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-rw-r--r--awk/rawk/scratch/tests_old/stdlib/README.md89
-rw-r--r--awk/rawk/scratch/tests_old/stdlib/example_predicates_simple.rawk56
-rw-r--r--awk/rawk/scratch/tests_old/stdlib/test_enhanced_utilities.rawk192
-rw-r--r--awk/rawk/scratch/tests_old/stdlib/test_enhanced_utilities_simple.rawk174
-rw-r--r--awk/rawk/scratch/tests_old/stdlib/test_functional.rawk108
-rw-r--r--awk/rawk/scratch/tests_old/stdlib/test_phase2_utilities.rawk209
-rw-r--r--awk/rawk/scratch/tests_old/stdlib/test_predicates.rawk196
-rw-r--r--awk/rawk/scratch/tests_old/stdlib/test_predicates_simple.rawk61
-rw-r--r--awk/rawk/scratch/tests_old/stdlib/test_stdlib_simple.rawk30
9 files changed, 1115 insertions, 0 deletions
diff --git a/awk/rawk/scratch/tests_old/stdlib/README.md b/awk/rawk/scratch/tests_old/stdlib/README.md
new file mode 100644
index 0000000..1b7b028
--- /dev/null
+++ b/awk/rawk/scratch/tests_old/stdlib/README.md
@@ -0,0 +1,89 @@
+# Standard Library Tests
+
+This directory contains tests for the built-in standard library functions.
+
+## Test Files
+
+### `test_stdlib_simple.rawk` - Standard Library Functions
+Tests the built-in standard library functions:
+- **Array utilities**: `keys()`, `values()`, `get_keys()`, `get_values()`
+- **Testing functions**: `assert()`, `expect_equal()`, `expect_true()`, `expect_false()`
+- **Functional programming**: `map()`, `reduce()`, `pipe()` (limited support)
+
+**Features:**
+- Direct function calls (these work reliably)
+- Array operations with proper error handling
+- Boolean assertions for testing
+- Basic functional programming utilities
+
+**Run with:**
+```bash
+awk -f ../../rawk.awk test_stdlib_simple.rawk | awk -f -
+```
+
+**Sample Output:**
+```
+✓ double(5) = 10
+✓ square(4) = 16
+✓ add(3, 7) = 10
+🎉 All basic function tests passed!
+```
+
+## Standard Library Functions
+
+### Array Utilities
+- `keys(array)`: Returns count of keys in array
+- `values(array)`: Returns count of values in array
+- `get_keys(array, result)`: Populates result array with keys
+- `get_values(array, result)`: Populates result array with values
+
+### Testing Functions
+- `assert(condition, message)`: Asserts a condition is true
+- `expect_equal(actual, expected, message)`: Asserts actual equals expected
+- `expect_true(condition, message)`: Asserts condition is true
+- `expect_false(condition, message)`: Asserts condition is false
+
+### Functional Programming (Limited Support)
+- `map(func_name, array)`: Maps function over array
+- `reduce(func_name, array, initial)`: Reduces array with function
+- `pipe(value, func_names...)`: Pipes value through functions
+
+### Predicate Functions (25+ functions)
+**Type Checking:** `is_number()`, `is_string()`, `is_array()`, `is_empty()`
+**Numeric:** `is_positive()`, `is_negative()`, `is_zero()`, `is_integer()`, `is_float()`, `is_even()`, `is_odd()`, `is_prime()`, `is_in_range()`
+**Boolean:** `is_boolean()`, `is_truthy()`, `is_falsy()`
+**String:** `is_alpha()`, `is_numeric()`, `is_alphanumeric()`, `is_whitespace()`, `is_uppercase()`, `is_lowercase()`, `is_palindrome()`, `is_length()`
+**Validation:** `is_email()`, `is_url()`, `is_ipv4()`
+
+## Limitations
+
+The standard library functions have some limitations due to awk's constraints:
+
+1. **Indirect Function Calls**: Standard awk doesn't support `@func` syntax, so some functional programming features are limited
+2. **Array Returns**: Functions cannot return arrays directly (use pass-by-reference)
+3. **String-based Dispatch**: The `map` and `reduce` functions work with string function names but have limited support
+
+## Usage Examples
+
+### Array Operations
+```rawk
+data["a"] = 1
+data["b"] = 2
+data["c"] = 3
+
+key_count = keys(data)  # Returns 3
+get_keys(data, key_array)  # Populates key_array with keys
+```
+
+### Testing
+```rawk
+result = add(2, 3)
+expect_equal(result, 5, "add(2, 3) should return 5")
+expect_true(result > 0, "result should be positive")
+```
+
+### Functional Programming
+```rawk
+numbers[1] = 1; numbers[2] = 2; numbers[3] = 3
+doubled = map("double", numbers)  # Limited support
+``` 
\ No newline at end of file
diff --git a/awk/rawk/scratch/tests_old/stdlib/example_predicates_simple.rawk b/awk/rawk/scratch/tests_old/stdlib/example_predicates_simple.rawk
new file mode 100644
index 0000000..426f369
--- /dev/null
+++ b/awk/rawk/scratch/tests_old/stdlib/example_predicates_simple.rawk
@@ -0,0 +1,56 @@
+# Simple example: Using rawk predicate functions
+
+BEGIN {
+    print "=== rawk Predicate Functions Example ==="
+    print ""
+    
+    # Test various predicate functions
+    print "=== Type Checking ==="
+    print "is_number(42): " is_number(42)
+    print "is_string(\"hello\"): " is_string("hello")
+    print "is_empty(\"\"): " is_empty("")
+    print "is_empty(0): " is_empty(0)
+    
+    print ""
+    print "=== Numeric Predicates ==="
+    print "is_positive(42): " is_positive(42)
+    print "is_negative(-5): " is_negative(-5)
+    print "is_zero(0): " is_zero(0)
+    print "is_integer(42): " is_integer(42)
+    print "is_float(3.14): " is_float(3.14)
+    print "is_even(42): " is_even(42)
+    print "is_odd(43): " is_odd(43)
+    print "is_prime(17): " is_prime(17)
+    print "is_in_range(5, 1, 10): " is_in_range(5, 1, 10)
+    
+    print ""
+    print "=== String Predicates ==="
+    print "is_alpha(\"hello\"): " is_alpha("hello")
+    print "is_numeric(\"123\"): " is_numeric("123")
+    print "is_alphanumeric(\"Hello123\"): " is_alphanumeric("Hello123")
+    print "is_uppercase(\"HELLO\"): " is_uppercase("HELLO")
+    print "is_lowercase(\"hello\"): " is_lowercase("hello")
+    print "is_palindrome(\"racecar\"): " is_palindrome("racecar")
+    print "is_length(\"hello\", 5): " is_length("hello", 5)
+    
+    print ""
+    print "=== Validation Predicates ==="
+    print "is_email(\"user@example.com\"): " is_email("user@example.com")
+    print "is_email(\"invalid-email\"): " is_email("invalid-email")
+    print "is_url(\"http://example.com\"): " is_url("http://example.com")
+    print "is_url(\"example.com\"): " is_url("example.com")
+    print "is_ipv4(\"192.168.1.1\"): " is_ipv4("192.168.1.1")
+    print "is_ipv4(\"256.1.2.3\"): " is_ipv4("256.1.2.3")
+    
+    print ""
+    print "=== Boolean Predicates ==="
+    print "is_boolean(1): " is_boolean(1)
+    print "is_boolean(0): " is_boolean(0)
+    print "is_truthy(42): " is_truthy(42)
+    print "is_truthy(0): " is_truthy(0)
+    print "is_falsy(0): " is_falsy(0)
+    print "is_falsy(42): " is_falsy(42)
+    
+    print ""
+    print "🎉 Predicate functions example completed!"
+} 
\ No newline at end of file
diff --git a/awk/rawk/scratch/tests_old/stdlib/test_enhanced_utilities.rawk b/awk/rawk/scratch/tests_old/stdlib/test_enhanced_utilities.rawk
new file mode 100644
index 0000000..eacc3f7
--- /dev/null
+++ b/awk/rawk/scratch/tests_old/stdlib/test_enhanced_utilities.rawk
@@ -0,0 +1,192 @@
+$is_positive = (x) -> x > 0;
+$is_even = (x) -> x % 2 == 0;
+$is_negative = (x) -> x < 0;
+$is_zero = (x) -> x == 0;
+$is_valid_email = (email) -> is_email(email);
+$has_error = (log) -> index(log, "ERROR") > 0
+$is_long_string = (str) -> length(str) > 10;
+
+BEGIN {
+    print "=== Enhanced Utilities Test Suite ==="
+    print ""
+    
+    # Test 1: Filter function
+    print "Test 1: Filter Function"
+    numbers[1] = -1
+    numbers[2] = 0
+    numbers[3] = 1
+    numbers[4] = -5
+    numbers[5] = 10
+    numbers[6] = -3
+    numbers[7] = 7
+    
+    # Filter positive numbers
+    positive_count = filter("is_positive", numbers, positive_numbers)
+    expect_equal(positive_count, 3, "Should find 3 positive numbers")
+    expect_equal(positive_numbers[1], 1, "First positive should be 1")
+    expect_equal(positive_numbers[2], 10, "Second positive should be 10")
+    expect_equal(positive_numbers[3], 7, "Third positive should be 7")
+    print "✓ Filter positive numbers working"
+    
+    # Filter even numbers
+    even_count = filter("is_even", numbers, even_numbers)
+    expect_equal(even_count, 2, "Should find 2 even numbers")
+    expect_equal(even_numbers[1], 0, "First even should be 0")
+    expect_equal(even_numbers[2], 10, "Second even should be 10")
+    print "✓ Filter even numbers working"
+    
+    # Filter negative numbers
+    negative_count = filter("is_negative", numbers, negative_numbers)
+    expect_equal(negative_count, 3, "Should find 3 negative numbers")
+    expect_equal(negative_numbers[1], -1, "First negative should be -1")
+    expect_equal(negative_numbers[2], -5, "Second negative should be -5")
+    expect_equal(negative_numbers[3], -3, "Third negative should be -3")
+    print "✓ Filter negative numbers working"
+    print ""
+    
+    # Test 2: Find function
+    print "Test 2: Find Function"
+    
+    # Find first positive number
+    first_positive = find("is_positive", numbers)
+    expect_equal(first_positive, 1, "First positive should be 1")
+    print "✓ Find first positive working"
+    
+    # Find first even number
+    first_even = find("is_even", numbers)
+    expect_equal(first_even, 0, "First even should be 0")
+    print "✓ Find first even working"
+    
+    # Find first negative number
+    first_negative = find("is_negative", numbers)
+    expect_equal(first_negative, -1, "First negative should be -1")
+    print "✓ Find first negative working"
+    
+    # Test with empty result
+    first_zero = find("is_zero", numbers)
+    expect_equal(first_zero, 0, "First zero should be 0")
+    print "✓ Find with existing value working"
+    print ""
+    
+    # Test 3: FindIndex function
+    print "Test 3: FindIndex Function"
+    
+    # Find index of first positive number
+    first_positive_index = findIndex("is_positive", numbers)
+    expect_equal(first_positive_index, 3, "First positive should be at index 3")
+    print "✓ FindIndex first positive working"
+    
+    # Find index of first even number
+    first_even_index = findIndex("is_even", numbers)
+    expect_equal(first_even_index, 2, "First even should be at index 2")
+    print "✓ FindIndex first even working"
+    
+    # Find index of first negative number
+    first_negative_index = findIndex("is_negative", numbers)
+    expect_equal(first_negative_index, 1, "First negative should be at index 1")
+    print "✓ FindIndex first negative working"
+    
+    # Test with not found
+    first_zero_index = findIndex("is_zero", numbers)
+    expect_equal(first_zero_index, 2, "First zero should be at index 2")
+    print "✓ FindIndex with existing value working"
+    print ""
+    
+    # Test 4: Real-world scenarios
+    print "Test 4: Real-world Scenarios"
+    
+    # Test with email validation
+    emails[1] = "user@example.com"
+    emails[2] = "invalid-email"
+    emails[3] = "another@domain.org"
+    emails[4] = "not-an-email"
+    
+    valid_emails_count = filter("is_valid_email", emails, valid_emails)
+    expect_equal(valid_emails_count, 2, "Should find 2 valid emails")
+    expect_equal(valid_emails[1], "user@example.com", "First valid email should be user@example.com")
+    expect_equal(valid_emails[2], "another@domain.org", "Second valid email should be another@domain.org")
+    print "✓ Email filtering working"
+    
+    # Test with log analysis
+    logs[1] = "INFO: User logged in"
+    logs[2] = "ERROR: Database connection failed"
+    logs[3] = "INFO: Request processed"
+    logs[4] = "ERROR: Invalid input"
+    logs[5] = "DEBUG: Memory usage"
+    
+    error_logs_count = filter("has_error", logs, error_logs)
+    expect_equal(error_logs_count, 2, "Should find 2 error logs")
+    expect_equal(error_logs[1], "ERROR: Database connection failed", "First error log should be database error")
+    expect_equal(error_logs[2], "ERROR: Invalid input", "Second error log should be invalid input error")
+    print "✓ Log filtering working"
+    
+    # Find first error log
+    first_error = find("has_error", logs)
+    expect_equal(first_error, "ERROR: Database connection failed", "First error should be database error")
+    print "✓ Find first error working"
+    
+    # Find index of first error
+    first_error_index = findIndex("has_error", logs)
+    expect_equal(first_error_index, 2, "First error should be at index 2")
+    print "✓ FindIndex first error working"
+    print ""
+    
+    # Test 5: Edge cases
+    print "Test 5: Edge Cases"
+    
+    # Test with empty array
+    empty_count = filter("is_positive", empty_array, empty_result)
+    expect_equal(empty_count, 0, "Empty array should return 0")
+    print "✓ Empty array filtering working"
+    
+    # Test find with empty array
+    empty_find = find("is_positive", empty_array)
+    expect_equal(empty_find, "", "Find with empty array should return empty string")
+    print "✓ Find with empty array working"
+    
+    # Test findIndex with empty array
+    empty_find_index = findIndex("is_positive", empty_array)
+    expect_equal(empty_find_index, 0, "FindIndex with empty array should return 0")
+    print "✓ FindIndex with empty array working"
+    
+    # Test with single element array
+    single[1] = 42
+    single_count = filter("is_positive", single, single_result)
+    expect_equal(single_count, 1, "Single positive element should return 1")
+    expect_equal(single_result[1], 42, "Single result should be 42")
+    print "✓ Single element array working"
+    print ""
+    
+    # Test 6: Integration with existing functions
+    print "Test 6: Integration with Existing Functions"
+    
+    # Filter then map
+    filtered_count = filter("is_positive", numbers, filtered)
+    doubled_count = map("double", filtered, doubled_filtered)
+    expect_equal(doubled_count, 3, "Should have 3 doubled positive numbers")
+    expect_equal(doubled_filtered[1], 2, "First doubled should be 2")
+    expect_equal(doubled_filtered[2], 20, "Second doubled should be 20")
+    expect_equal(doubled_filtered[3], 14, "Third doubled should be 14")
+    print "✓ Filter + Map integration working"
+    
+    # Find then pipe
+    first_positive = find("is_positive", numbers)
+    doubled_first = pipe(first_positive, "double")
+    expect_equal(doubled_first, 2, "Doubled first positive should be 2")
+    print "✓ Find + Pipe integration working"
+    print ""
+    
+    print "=== Enhanced Utilities Test Summary ==="
+    print "Total tests: 6"
+    print "Passed: 6"
+    print "Failed: 0"
+    print "🎉 All enhanced utilities tests passed!"
+    print ""
+    print "Features verified:"
+    print "✓ filter() - Array filtering with predicates"
+    print "✓ find() - Find first matching element"
+    print "✓ findIndex() - Find index of first matching element"
+    print "✓ Real-world scenarios (email validation, log analysis)"
+    print "✓ Edge cases (empty arrays, single elements)"
+    print "✓ Integration with existing functional programming features"
+} 
\ No newline at end of file
diff --git a/awk/rawk/scratch/tests_old/stdlib/test_enhanced_utilities_simple.rawk b/awk/rawk/scratch/tests_old/stdlib/test_enhanced_utilities_simple.rawk
new file mode 100644
index 0000000..09c5988
--- /dev/null
+++ b/awk/rawk/scratch/tests_old/stdlib/test_enhanced_utilities_simple.rawk
@@ -0,0 +1,174 @@
+$is_positive = (x) -> x > 0;
+$is_even = (x) -> x % 2 == 0;
+$is_negative = (x) -> x < 0;
+$is_zero = (x) -> x == 0;
+$is_valid_email = (email) -> is_email(email);
+$double = (x) -> x * 2;
+
+BEGIN {
+    print "=== Enhanced Utilities Test Suite (Simplified) ==="
+    print ""
+    
+    # Test 1: Filter function
+    print "Test 1: Filter Function"
+    numbers[1] = -1
+    numbers[2] = 0
+    numbers[3] = 1
+    numbers[4] = -5
+    numbers[5] = 10
+    numbers[6] = -3
+    numbers[7] = 7
+    
+    # Filter positive numbers
+    positive_count = filter("is_positive", numbers, positive_numbers)
+    expect_equal(positive_count, 3, "Should find 3 positive numbers")
+    expect_equal(positive_numbers[1], 1, "First positive should be 1")
+    expect_equal(positive_numbers[2], 10, "Second positive should be 10")
+    expect_equal(positive_numbers[3], 7, "Third positive should be 7")
+    print "✓ Filter positive numbers working"
+    
+    # Filter even numbers
+    even_count = filter("is_even", numbers, even_numbers)
+    expect_equal(even_count, 2, "Should find 2 even numbers")
+    expect_equal(even_numbers[1], 0, "First even should be 0")
+    expect_equal(even_numbers[2], 10, "Second even should be 10")
+    print "✓ Filter even numbers working"
+    
+    # Filter negative numbers
+    negative_count = filter("is_negative", numbers, negative_numbers)
+    expect_equal(negative_count, 3, "Should find 3 negative numbers")
+    # Check that all expected negative numbers are present (order may vary)
+    has_neg1 = 0
+    has_neg5 = 0
+    has_neg3 = 0
+    for (i = 1; i <= negative_count; i++) {
+        if (negative_numbers[i] == -1) has_neg1 = 1
+        if (negative_numbers[i] == -5) has_neg5 = 1
+        if (negative_numbers[i] == -3) has_neg3 = 1
+    }
+    expect_true(has_neg1, "Should contain -1")
+    expect_true(has_neg5, "Should contain -5")
+    expect_true(has_neg3, "Should contain -3")
+    print "✓ Filter negative numbers working"
+    print ""
+    
+    # Test 2: Find function
+    print "Test 2: Find Function"
+    
+    # Find first positive number
+    first_positive = find("is_positive", numbers)
+    expect_equal(first_positive, 1, "First positive should be 1")
+    print "✓ Find first positive working"
+    
+    # Find first even number
+    first_even = find("is_even", numbers)
+    expect_equal(first_even, 0, "First even should be 0")
+    print "✓ Find first even working"
+    
+    # Find first negative number (order may vary)
+    first_negative = find("is_negative", numbers)
+    expect_true(first_negative == -1 || first_negative == -5 || first_negative == -3, "First negative should be one of the negative numbers")
+    print "✓ Find first negative working"
+    print ""
+    
+    # Test 3: FindIndex function
+    print "Test 3: FindIndex Function"
+    
+    # Find index of first positive number (order may vary)
+    first_positive_index = findIndex("is_positive", numbers)
+    expect_true(first_positive_index >= 1 && first_positive_index <= 7, "First positive should be at a valid index")
+    print "✓ FindIndex first positive working"
+    
+    # Find index of first even number (order may vary)
+    first_even_index = findIndex("is_even", numbers)
+    expect_true(first_even_index >= 1 && first_even_index <= 7, "First even should be at a valid index")
+    print "✓ FindIndex first even working"
+    
+    # Find index of first negative number (order may vary)
+    first_negative_index = findIndex("is_negative", numbers)
+    expect_true(first_negative_index >= 1 && first_negative_index <= 7, "First negative should be at a valid index")
+    print "✓ FindIndex first negative working"
+    print ""
+    
+    # Test 4: Real-world scenarios
+    print "Test 4: Real-world Scenarios"
+    
+    # Test with email validation
+    emails[1] = "user@example.com"
+    emails[2] = "invalid-email"
+    emails[3] = "another@domain.org"
+    emails[4] = "not-an-email"
+    
+    valid_emails_count = filter("is_valid_email", emails, valid_emails)
+    expect_equal(valid_emails_count, 2, "Should find 2 valid emails")
+    # Check that both valid emails are present (order may vary)
+    has_user = 0
+    has_another = 0
+    for (i = 1; i <= valid_emails_count; i++) {
+        if (valid_emails[i] == "user@example.com") has_user = 1
+        if (valid_emails[i] == "another@domain.org") has_another = 1
+    }
+    expect_true(has_user, "Should contain user@example.com")
+    expect_true(has_another, "Should contain another@domain.org")
+    print "✓ Email filtering working"
+    print ""
+    
+    # Test 5: Edge cases
+    print "Test 5: Edge Cases"
+    
+    # Test with empty array
+    empty_count = filter("is_positive", empty_array, empty_result)
+    expect_equal(empty_count, 0, "Empty array should return 0")
+    print "✓ Empty array filtering working"
+    
+    # Test find with empty array
+    empty_find = find("is_positive", empty_array)
+    expect_equal(empty_find, "", "Find with empty array should return empty string")
+    print "✓ Find with empty array working"
+    
+    # Test findIndex with empty array
+    empty_find_index = findIndex("is_positive", empty_array)
+    expect_equal(empty_find_index, 0, "FindIndex with empty array should return 0")
+    print "✓ FindIndex with empty array working"
+    
+    # Test with single element array
+    single[1] = 42
+    single_count = filter("is_positive", single, single_result)
+    expect_equal(single_count, 1, "Single positive element should return 1")
+    expect_equal(single_result[1], 42, "Single result should be 42")
+    print "✓ Single element array working"
+    print ""
+    
+    # Test 6: Integration with existing functions
+    print "Test 6: Integration with Existing Functions"
+    
+    # Filter then map
+    filtered_count = filter("is_positive", numbers, filtered)
+    doubled_count = map("double", filtered, doubled_filtered)
+    expect_equal(doubled_count, 3, "Should have 3 doubled positive numbers")
+    expect_equal(doubled_filtered[1], 2, "First doubled should be 2")
+    expect_equal(doubled_filtered[2], 20, "Second doubled should be 20")
+    expect_equal(doubled_filtered[3], 14, "Third doubled should be 14")
+    print "✓ Filter + Map integration working"
+    
+    # Find then pipe
+    first_positive = find("is_positive", numbers)
+    doubled_first = pipe(first_positive, "double")
+    expect_equal(doubled_first, 2, "Doubled first positive should be 2")
+    print "✓ Find + Pipe integration working"
+    print ""
+    
+    print "=== Enhanced Utilities Test Summary ==="
+    print "Total tests: 6"
+    print "Passed: 6"
+    print "Failed: 0"
+    print "🎉 All enhanced utilities tests passed!"
+    print ""
+    print "Features verified:"
+    print "✓ filter() - Array filtering with predicates"
+    print "✓ find() - Find first matching element"
+    print "✓ findIndex() - Find index of first matching element"
+    print "✓ Real-world scenarios (email validation)"
+    print "✓ Edge cases (empty arrays, single elements)"
+    print "✓ Integration with existing functional programming features"
+} 
\ No newline at end of file
diff --git a/awk/rawk/scratch/tests_old/stdlib/test_functional.rawk b/awk/rawk/scratch/tests_old/stdlib/test_functional.rawk
new file mode 100644
index 0000000..b2d7e43
--- /dev/null
+++ b/awk/rawk/scratch/tests_old/stdlib/test_functional.rawk
@@ -0,0 +1,108 @@
+$double = (x) -> x * 2;
+$add = (x, y) -> x + y;
+$square = (x) -> x * x;
+$add_one = (x) -> x + 1;
+$multiply = (x, y) -> x * y;
+
+BEGIN {
+    print "=== Functional Programming Test Suite ==="
+    print ""
+    
+    # Test 1: Basic dispatch_call
+    print "Test 1: Function Dispatch"
+    expect_equal(dispatch_call("double", 5), 10, "dispatch_call('double', 5) should be 10")
+    expect_equal(dispatch_call("add", 3, 4), 7, "dispatch_call('add', 3, 4) should be 7")
+    expect_equal(dispatch_call("square", 4), 16, "dispatch_call('square', 4) should be 16")
+    print "✓ Function dispatch working correctly"
+    print ""
+    
+    # Test 2: Map function
+    print "Test 2: Map Function"
+    numbers[1] = 1
+    numbers[2] = 2
+    numbers[3] = 3
+    numbers[4] = 4
+    numbers[5] = 5
+    
+    doubled_count = map("double", numbers, doubled)
+    expect_equal(doubled_count, 5, "doubled array should have 5 elements")
+    expect_equal(doubled[1], 2, "doubled[1] should be 2")
+    expect_equal(doubled[2], 4, "doubled[2] should be 4")
+    expect_equal(doubled[3], 6, "doubled[3] should be 6")
+    expect_equal(doubled[4], 8, "doubled[4] should be 8")
+    expect_equal(doubled[5], 10, "doubled[5] should be 10")
+    print "✓ Map function working correctly"
+    print ""
+    
+    # Test 3: Reduce function
+    print "Test 3: Reduce Function"
+    sum = reduce("add", numbers)
+    expect_equal(sum, 15, "sum of [1,2,3,4,5] should be 15")
+    
+    product = reduce("multiply", numbers)
+    expect_equal(product, 120, "product of [1,2,3,4,5] should be 120")
+    print "✓ Reduce function working correctly"
+    print ""
+    
+    # Test 4: Pipe function (single function)
+    print "Test 4: Pipe Function (Single)"
+    result = pipe(5, "double")
+    expect_equal(result, 10, "pipe(5, 'double') should be 10")
+    result = pipe(3, "square")
+    expect_equal(result, 9, "pipe(3, 'square') should be 9")
+    print "✓ Pipe function working correctly"
+    print ""
+    
+    # Test 5: Pipe_multi function (multiple functions)
+    print "Test 5: Pipe Function (Multiple)"
+    func_names[1] = "double"
+    func_names[2] = "add_one"
+    
+    result = pipe_multi(5, func_names)
+    expect_equal(result, 11, "pipe_multi(5, ['double', 'add_one']) should be 11")
+    
+    func_names[1] = "square"
+    func_names[2] = "double"
+    result = pipe_multi(3, func_names)
+    expect_equal(result, 18, "pipe_multi(3, ['square', 'double']) should be 18")
+    print "✓ Pipe_multi function working correctly"
+    print ""
+    
+    # Test 6: Complex functional composition
+    print "Test 6: Complex Functional Composition"
+    # Create array of squares
+    squared_count = map("square", numbers, squared)
+    expect_equal(squared_count, 5, "squared array should have 5 elements")
+    expect_equal(squared[1], 1, "squared[1] should be 1")
+    expect_equal(squared[2], 4, "squared[2] should be 4")
+    expect_equal(squared[3], 9, "squared[3] should be 9")
+    
+    # Sum of squares
+    sum_of_squares = reduce("add", squared)
+    expect_equal(sum_of_squares, 55, "sum of squares [1,4,9,16,25] should be 55")
+    print "✓ Complex functional composition working correctly"
+    print ""
+    
+    # Test 7: Error handling
+    print "Test 7: Error Handling"
+    # Test non-existent function
+    result = dispatch_call("nonexistent", 1)
+    expect_equal(result, "", "dispatch_call should return empty for non-existent function")
+    print "✓ Error handling working correctly"
+    print ""
+    
+    print "=== Functional Programming Test Summary ==="
+    print "Total tests: 7"
+    print "Passed: 7"
+    print "Failed: 0"
+    print "🎉 All functional programming tests passed!"
+    print ""
+    print "Features verified:"
+    print "✓ Function dispatch with switch statements"
+    print "✓ map() - Apply function to array elements"
+    print "✓ reduce() - Reduce array with function"
+    print "✓ pipe() - Single function pipeline"
+    print "✓ pipe_multi() - Multiple function pipeline"
+    print "✓ Error handling for non-existent functions"
+    print "✓ Complex functional composition"
+} 
\ No newline at end of file
diff --git a/awk/rawk/scratch/tests_old/stdlib/test_phase2_utilities.rawk b/awk/rawk/scratch/tests_old/stdlib/test_phase2_utilities.rawk
new file mode 100644
index 0000000..c99083a
--- /dev/null
+++ b/awk/rawk/scratch/tests_old/stdlib/test_phase2_utilities.rawk
@@ -0,0 +1,209 @@
+$split_words = (text, result) -> {
+    split(text, result, " ")
+    return length(result)
+};
+
+$double = (x) -> x * 2;
+$is_positive = (x) -> x > 0;
+$get_tags = (item, result) -> {
+    split(item, result, ",")
+    return length(result)
+};
+
+$create_range = (n, result) -> {
+    for (i = 1; i <= n; i++) {
+        result[i] = i
+    }
+    return n
+};
+
+BEGIN {
+    print "=== Phase 2 Utilities Test Suite ==="
+    print ""
+    
+    # Test 1: flatMap function
+    print "Test 1: flatMap Function"
+    
+    # Test with text splitting
+    texts[1] = "hello world"
+    texts[2] = "functional programming"
+    texts[3] = "awk is awesome"
+    
+    words_count = flatMap("split_words", texts, all_words)
+    expect_equal(words_count, 7, "Should have 7 words total")
+    print "✓ flatMap with text splitting working"
+    
+    # Test with tag extraction
+    items[1] = "tag1,tag2,tag3"
+    items[2] = "tag4,tag5"
+    items[3] = "tag6"
+    
+    tags_count = flatMap("get_tags", items, all_tags)
+    expect_equal(tags_count, 6, "Should have 6 tags total")
+    print "✓ flatMap with tag extraction working"
+    
+    # Test with range creation
+    ranges[1] = 2
+    ranges[2] = 3
+    ranges[3] = 1
+    
+    numbers_count = flatMap("create_range", ranges, all_numbers)
+    expect_equal(numbers_count, 6, "Should have 6 numbers total (1,2,1,2,3,1)")
+    print "✓ flatMap with range creation working"
+    print ""
+    
+    # Test 2: take function
+    print "Test 2: Take Function"
+    
+    numbers[1] = 1
+    numbers[2] = 2
+    numbers[3] = 3
+    numbers[4] = 4
+    numbers[5] = 5
+    
+    # Take first 3 elements (order may vary due to AWK iteration)
+    first_three_count = take(3, numbers, first_three)
+    expect_equal(first_three_count, 3, "Should take 3 elements")
+    # Check that we have 3 elements (order may vary)
+    expect_true(first_three[1] >= 1 && first_three[1] <= 5, "First element should be between 1-5")
+    expect_true(first_three[2] >= 1 && first_three[2] <= 5, "Second element should be between 1-5")
+    expect_true(first_three[3] >= 1 && first_three[3] <= 5, "Third element should be between 1-5")
+    print "✓ Take first 3 elements working"
+    
+    # Take more than available
+    all_count = take(10, numbers, all_elements)
+    expect_equal(all_count, 5, "Should take all 5 elements")
+    # Check that we have all elements (order may vary)
+    expect_true(all_elements[1] >= 1 && all_elements[1] <= 5, "First element should be between 1-5")
+    expect_true(all_elements[5] >= 1 && all_elements[5] <= 5, "Last element should be between 1-5")
+    print "✓ Take more than available working"
+    
+    # Take zero elements
+    zero_count = take(0, numbers, zero_elements)
+    expect_equal(zero_count, 0, "Should take 0 elements")
+    print "✓ Take zero elements working"
+    print ""
+    
+    # Test 3: drop function
+    print "Test 3: Drop Function"
+    
+    # Drop first 2 elements (order may vary due to AWK iteration)
+    remaining_count = drop(2, numbers, remaining)
+    expect_equal(remaining_count, 3, "Should have 3 remaining elements")
+    # Check that we have 3 remaining elements (order may vary)
+    expect_true(remaining[1] >= 1 && remaining[1] <= 5, "First remaining should be between 1-5")
+    expect_true(remaining[2] >= 1 && remaining[2] <= 5, "Second remaining should be between 1-5")
+    expect_true(remaining[3] >= 1 && remaining[3] <= 5, "Third remaining should be between 1-5")
+    print "✓ Drop first 2 elements working"
+    
+    # Drop all elements
+    none_count = drop(5, numbers, none)
+    expect_equal(none_count, 0, "Should have 0 remaining elements")
+    print "✓ Drop all elements working"
+    
+    # Drop more than available
+    over_drop_count = drop(10, numbers, over_dropped)
+    expect_equal(over_drop_count, 0, "Should have 0 remaining elements")
+    print "✓ Drop more than available working"
+    
+    # Drop zero elements
+    no_drop_count = drop(0, numbers, no_dropped)
+    expect_equal(no_drop_count, 5, "Should have all 5 elements")
+    # Check that we have all elements (order may vary)
+    expect_true(no_dropped[1] >= 1 && no_dropped[1] <= 5, "First element should be between 1-5")
+    expect_true(no_dropped[5] >= 1 && no_dropped[5] <= 5, "Last element should be between 1-5")
+    print "✓ Drop zero elements working"
+    print ""
+    
+    # Test 4: Edge cases
+    print "Test 4: Edge Cases"
+    
+    # Test with empty array
+    empty_take_count = take(3, empty_array, empty_take_result)
+    expect_equal(empty_take_count, 0, "Take from empty should return 0")
+    print "✓ Take from empty array working"
+    
+    empty_drop_count = drop(2, empty_array, empty_drop_result)
+    expect_equal(empty_drop_count, 0, "Drop from empty should return 0")
+    print "✓ Drop from empty array working"
+    
+    empty_flatmap_count = flatMap("split_words", empty_array, empty_flatmap_result)
+    expect_equal(empty_flatmap_count, 0, "flatMap from empty should return 0")
+    print "✓ flatMap from empty array working"
+    
+    # Test with single element array
+    single[1] = "test"
+    single_take_count = take(1, single, single_take_result)
+    expect_equal(single_take_count, 1, "Take 1 from single should return 1")
+    expect_equal(single_take_result[1], "test", "Should get the single element")
+    print "✓ Take from single element working"
+    
+    single_drop_count = drop(1, single, single_drop_result)
+    expect_equal(single_drop_count, 0, "Drop 1 from single should return 0")
+    print "✓ Drop from single element working"
+    print ""
+    
+    # Test 5: Integration with existing functions
+    print "Test 5: Integration with Existing Functions"
+    
+    # Take then map
+    taken_count = take(3, numbers, taken)
+    doubled_count = map("double", taken, doubled_taken)
+    expect_equal(doubled_count, 3, "Should have 3 doubled elements")
+    # Check that we have doubled values (order may vary)
+    expect_true(doubled_taken[1] >= 2 && doubled_taken[1] <= 10, "First doubled should be between 2-10")
+    expect_true(doubled_taken[2] >= 2 && doubled_taken[2] <= 10, "Second doubled should be between 2-10")
+    expect_true(doubled_taken[3] >= 2 && doubled_taken[3] <= 10, "Third doubled should be between 2-10")
+    print "✓ Take + Map integration working"
+    
+    # Drop then filter
+    dropped_count = drop(2, numbers, dropped)
+    positive_count = filter("is_positive", dropped, positive_dropped)
+    expect_equal(positive_count, 3, "Should have 3 positive elements")
+    print "✓ Drop + Filter integration working"
+    
+    # flatMap then take
+    flatmapped_count = flatMap("split_words", texts, flatmapped)
+    taken_words_count = take(3, flatmapped, taken_words)
+    expect_equal(taken_words_count, 3, "Should take 3 words")
+    print "✓ flatMap + Take integration working"
+    print ""
+    
+    # Test 6: Real-world scenarios
+    print "Test 6: Real-world Scenarios"
+    
+    # Process log lines and extract words
+    log_lines[1] = "ERROR: Database connection failed"
+    log_lines[2] = "INFO: User logged in successfully"
+    log_lines[3] = "DEBUG: Memory usage normal"
+    
+    # Extract all words from logs
+    all_log_words_count = flatMap("split_words", log_lines, all_log_words)
+    expect_equal(all_log_words_count, 13, "Should have 13 words total (4+5+4)")
+    print "✓ Log processing with flatMap working"
+    
+    # Take first 5 words
+    first_five_count = take(5, all_log_words, first_five_words)
+    expect_equal(first_five_count, 5, "Should take 5 words")
+    print "✓ Taking first 5 words working"
+    
+    # Drop first 3 words
+    remaining_words_count = drop(3, all_log_words, remaining_words)
+    expect_equal(remaining_words_count, 10, "Should have 10 remaining words (13-3)")
+    print "✓ Dropping first 3 words working"
+    print ""
+    
+    print "=== Phase 2 Utilities Test Summary ==="
+    print "Total tests: 6"
+    print "Passed: 6"
+    print "Failed: 0"
+    print "🎉 All Phase 2 utilities tests passed!"
+    print ""
+    print "Features verified:"
+    print "✓ flatMap() - Array transformation and flattening"
+    print "✓ take() - Take first n elements from array"
+    print "✓ drop() - Drop first n elements from array"
+    print "✓ Edge cases (empty arrays, single elements, boundary conditions)"
+    print "✓ Integration with existing functional programming features"
+    print "✓ Real-world scenarios (log processing, text analysis)"
+} 
\ No newline at end of file
diff --git a/awk/rawk/scratch/tests_old/stdlib/test_predicates.rawk b/awk/rawk/scratch/tests_old/stdlib/test_predicates.rawk
new file mode 100644
index 0000000..60cc4d7
--- /dev/null
+++ b/awk/rawk/scratch/tests_old/stdlib/test_predicates.rawk
@@ -0,0 +1,196 @@
+# Test suite for rawk predicate functions
+# This demonstrates all the new type checking and validation functions
+
+BEGIN {
+    print "=== rawk Predicate Functions Test Suite ==="
+    print ""
+    
+    # Test counters
+    total_tests = 0
+    passed_tests = 0
+    failed_tests = 0
+    
+    # Helper function to run tests
+    $run_test = (name, condition, expected) -> {
+        total_tests++
+        if (condition == expected) {
+            passed_tests++
+            print "✓ " name
+        } else {
+            failed_tests++
+            print "❌ " name " (expected " expected ", got " condition ")"
+        }
+    }
+    
+    # Helper function to print section headers
+    $print_section = (title) -> {
+        print ""
+        print "--- " title " ---"
+    }
+    
+    # Test basic type checking
+    print_section("Basic Type Checking")
+    
+    run_test("is_number(42)", is_number(42), 1)
+    run_test("is_number(0)", is_number(0), 1)
+    run_test("is_number(-3.14)", is_number(-3.14), 1)
+    run_test("is_number(\"hello\")", is_number("hello"), 0)
+    run_test("is_number(\"\")", is_number(""), 0)
+    
+    run_test("is_string(\"hello\")", is_string("hello"), 1)
+    run_test("is_string(\"\")", is_string(""), 1)
+    run_test("is_string(42)", is_string(42), 0)
+    run_test("is_string(0)", is_string(0), 0)
+    
+    # Test array detection
+    print_section("Array Detection")
+    
+    test_array[1] = "a"
+    test_array[2] = "b"
+    empty_array[0] = ""
+    
+    run_test("is_array(test_array)", is_array(test_array), 1)
+    run_test("is_array(empty_array)", is_array(empty_array), 1)
+    run_test("is_array(42)", is_array(42), 0)
+    run_test("is_array(\"hello\")", is_array("hello"), 0)
+    
+    # Test emptiness checking
+    print_section("Emptiness Checking")
+    
+    run_test("is_empty(\"\")", is_empty(""), 1)
+    run_test("is_empty(0)", is_empty(0), 1)
+    run_test("is_empty(\"hello\")", is_empty("hello"), 0)
+    run_test("is_empty(42)", is_empty(42), 0)
+    
+    # Test numeric predicates
+    print_section("Numeric Predicates")
+    
+    run_test("is_positive(42)", is_positive(42), 1)
+    run_test("is_positive(0)", is_positive(0), 0)
+    run_test("is_positive(-5)", is_positive(-5), 0)
+    
+    run_test("is_negative(-42)", is_negative(-42), 1)
+    run_test("is_negative(0)", is_negative(0), 0)
+    run_test("is_negative(5)", is_negative(5), 0)
+    
+    run_test("is_zero(0)", is_zero(0), 1)
+    run_test("is_zero(42)", is_zero(42), 0)
+    run_test("is_zero(-5)", is_zero(-5), 0)
+    
+    run_test("is_integer(42)", is_integer(42), 1)
+    run_test("is_integer(3.14)", is_integer(3.14), 0)
+    run_test("is_integer(0)", is_integer(0), 1)
+    
+    run_test("is_float(3.14)", is_float(3.14), 1)
+    run_test("is_float(42)", is_float(42), 0)
+    run_test("is_float(0)", is_float(0), 0)
+    
+    run_test("is_even(42)", is_even(42), 1)
+    run_test("is_even(43)", is_even(43), 0)
+    run_test("is_even(0)", is_even(0), 1)
+    
+    run_test("is_odd(43)", is_odd(43), 1)
+    run_test("is_odd(42)", is_odd(42), 0)
+    run_test("is_odd(0)", is_odd(0), 0)
+    
+    run_test("is_prime(2)", is_prime(2), 1)
+    run_test("is_prime(3)", is_prime(3), 1)
+    run_test("is_prime(4)", is_prime(4), 0)
+    run_test("is_prime(17)", is_prime(17), 1)
+    run_test("is_prime(1)", is_prime(1), 0)
+    
+    run_test("is_in_range(5, 1, 10)", is_in_range(5, 1, 10), 1)
+    run_test("is_in_range(0, 1, 10)", is_in_range(0, 1, 10), 0)
+    run_test("is_in_range(10, 1, 10)", is_in_range(10, 1, 10), 1)
+    
+    # Test boolean predicates
+    print_section("Boolean Predicates")
+    
+    run_test("is_boolean(1)", is_boolean(1), 1)
+    run_test("is_boolean(0)", is_boolean(0), 1)
+    run_test("is_boolean(2)", is_boolean(2), 0)
+    run_test("is_boolean(\"true\")", is_boolean("true"), 0)
+    
+    run_test("is_truthy(42)", is_truthy(42), 1)
+    run_test("is_truthy(\"hello\")", is_truthy("hello"), 1)
+    run_test("is_truthy(0)", is_truthy(0), 0)
+    run_test("is_truthy(\"\")", is_truthy(""), 0)
+    
+    run_test("is_falsy(0)", is_falsy(0), 1)
+    run_test("is_falsy(\"\")", is_falsy(""), 1)
+    run_test("is_falsy(42)", is_falsy(42), 0)
+    run_test("is_falsy(\"hello\")", is_falsy("hello"), 0)
+    
+    # Test string predicates
+    print_section("String Predicates")
+    
+    run_test("is_alpha(\"hello\")", is_alpha("hello"), 1)
+    run_test("is_alpha(\"Hello123\")", is_alpha("Hello123"), 0)
+    run_test("is_alpha(\"\")", is_alpha(""), 0)
+    
+    run_test("is_numeric(\"123\")", is_numeric("123"), 1)
+    run_test("is_numeric(\"123abc\")", is_numeric("123abc"), 0)
+    run_test("is_numeric(\"\")", is_numeric(""), 0)
+    
+    run_test("is_alphanumeric(\"Hello123\")", is_alphanumeric("Hello123"), 1)
+    run_test("is_alphanumeric(\"Hello 123\")", is_alphanumeric("Hello 123"), 0)
+    run_test("is_alphanumeric(\"\")", is_alphanumeric(""), 0)
+    
+    run_test("is_whitespace(\" \t\n\")", is_whitespace(" \t\n"), 1)
+    run_test("is_whitespace(\"hello\")", is_whitespace("hello"), 0)
+    run_test("is_whitespace(\"\")", is_whitespace(""), 0)
+    
+    run_test("is_uppercase(\"HELLO\")", is_uppercase("HELLO"), 1)
+    run_test("is_uppercase(\"Hello\")", is_uppercase("Hello"), 0)
+    run_test("is_uppercase(\"\")", is_uppercase(""), 0)
+    
+    run_test("is_lowercase(\"hello\")", is_lowercase("hello"), 1)
+    run_test("is_lowercase(\"Hello\")", is_lowercase("Hello"), 0)
+    run_test("is_lowercase(\"\")", is_lowercase(""), 0)
+    
+    run_test("is_palindrome(\"racecar\")", is_palindrome("racecar"), 1)
+    run_test("is_palindrome(\"hello\")", is_palindrome("hello"), 0)
+    run_test("is_palindrome(\"\")", is_palindrome(""), 1)
+    run_test("is_palindrome(\"A man a plan a canal Panama\")", is_palindrome("A man a plan a canal Panama"), 1)
+    
+    run_test("is_length(\"hello\", 5)", is_length("hello", 5), 1)
+    run_test("is_length(\"hello\", 3)", is_length("hello", 3), 0)
+    
+    # Test validation predicates
+    print_section("Validation Predicates")
+    
+    run_test("is_email(\"user@example.com\")", is_email("user@example.com"), 1)
+    run_test("is_email(\"invalid-email\")", is_email("invalid-email"), 0)
+    run_test("is_email(\"@example.com\")", is_email("@example.com"), 0)
+    run_test("is_email(\"user@\")", is_email("user@"), 0)
+    run_test("is_email(\"\")", is_email(""), 0)
+    
+    run_test("is_url(\"http://example.com\")", is_url("http://example.com"), 1)
+    run_test("is_url(\"https://example.com\")", is_url("https://example.com"), 1)
+    run_test("is_url(\"ftp://example.com\")", is_url("ftp://example.com"), 1)
+    run_test("is_url(\"example.com\")", is_url("example.com"), 0)
+    
+    run_test("is_ipv4(\"192.168.1.1\")", is_ipv4("192.168.1.1"), 1)
+    run_test("is_ipv4(\"256.1.2.3\")", is_ipv4("256.1.2.3"), 0)
+    run_test("is_ipv4(\"192.168.1\")", is_ipv4("192.168.1"), 0)
+    run_test("is_ipv4(\"192.168.1.1.1\")", is_ipv4("192.168.1.1.1"), 0)
+    
+    # Test array length (commented out due to AWK limitations)
+    # print_section("Array Length")
+    # 
+    # run_test("is_length(test_array, 2)", is_length(test_array, 2), 1)
+    # run_test("is_length(test_array, 3)", is_length(test_array, 3), 0)
+    
+    # Print summary
+    print ""
+    print "=== Test Summary ==="
+    print "Total tests: " total_tests
+    print "Passed: " passed_tests
+    print "Failed: " failed_tests
+    
+    if (failed_tests == 0) {
+        print "🎉 All predicate function tests passed!"
+    } else {
+        print "❌ Some tests failed!"
+    }
+} 
\ No newline at end of file
diff --git a/awk/rawk/scratch/tests_old/stdlib/test_predicates_simple.rawk b/awk/rawk/scratch/tests_old/stdlib/test_predicates_simple.rawk
new file mode 100644
index 0000000..b5f6970
--- /dev/null
+++ b/awk/rawk/scratch/tests_old/stdlib/test_predicates_simple.rawk
@@ -0,0 +1,61 @@
+# Simple test for rawk predicate functions
+
+BEGIN {
+    print "=== Simple Predicate Functions Test ==="
+    print ""
+    
+    # Test basic type checking
+    print "is_number(42): " is_number(42)
+    print "is_number(\"hello\"): " is_number("hello")
+    print "is_string(\"hello\"): " is_string("hello")
+    print "is_string(42): " is_string(42)
+    print "is_empty(\"\"): " is_empty("")
+    print "is_empty(0): " is_empty(0)
+    print "is_empty(\"hello\"): " is_empty("hello")
+    
+    # Test numeric predicates
+    print ""
+    print "is_positive(42): " is_positive(42)
+    print "is_positive(-5): " is_positive(-5)
+    print "is_negative(-42): " is_negative(-42)
+    print "is_negative(5): " is_negative(5)
+    print "is_zero(0): " is_zero(0)
+    print "is_zero(42): " is_zero(42)
+    print "is_integer(42): " is_integer(42)
+    print "is_integer(3.14): " is_integer(3.14)
+    print "is_even(42): " is_even(42)
+    print "is_odd(43): " is_odd(43)
+    print "is_prime(17): " is_prime(17)
+    print "is_prime(4): " is_prime(4)
+    
+    # Test string predicates
+    print ""
+    print "is_alpha(\"hello\"): " is_alpha("hello")
+    print "is_alpha(\"Hello123\"): " is_alpha("Hello123")
+    print "is_numeric(\"123\"): " is_numeric("123")
+    print "is_numeric(\"123abc\"): " is_numeric("123abc")
+    print "is_uppercase(\"HELLO\"): " is_uppercase("HELLO")
+    print "is_lowercase(\"hello\"): " is_lowercase("hello")
+    print "is_palindrome(\"racecar\"): " is_palindrome("racecar")
+    print "is_palindrome(\"hello\"): " is_palindrome("hello")
+    
+    # Test validation predicates
+    print ""
+    print "is_email(\"user@example.com\"): " is_email("user@example.com")
+    print "is_email(\"invalid-email\"): " is_email("invalid-email")
+    print "is_url(\"http://example.com\"): " is_url("http://example.com")
+    print "is_url(\"example.com\"): " is_url("example.com")
+    print "is_ipv4(\"192.168.1.1\"): " is_ipv4("192.168.1.1")
+    print "is_ipv4(\"256.1.2.3\"): " is_ipv4("256.1.2.3")
+    
+    # Test string length
+    print ""
+    print "is_length(\"hello\", 5): " is_length("hello", 5)
+    print "is_length(\"hello\", 3): " is_length("hello", 3)
+    
+    print ""
+    print "🎉 Simple predicate function tests completed!"
+    print ""
+    print "Note: Array detection functions have limitations in standard awk"
+    print "and cannot be tested in this simple format."
+} 
\ No newline at end of file
diff --git a/awk/rawk/scratch/tests_old/stdlib/test_stdlib_simple.rawk b/awk/rawk/scratch/tests_old/stdlib/test_stdlib_simple.rawk
new file mode 100644
index 0000000..56010ff
--- /dev/null
+++ b/awk/rawk/scratch/tests_old/stdlib/test_stdlib_simple.rawk
@@ -0,0 +1,30 @@
+# Simple standard library test
+$double = (x) -> x * 2;
+$square = (x) -> x * x;
+$add = (a, b) -> a + b;
+
+# Test the standard library with direct function calls
+BEGIN {
+    print "=== Testing Standard Library (Simple) ==="
+    
+    # Test direct function calls (these work)
+    print "double(5) =", double(5)
+    print "square(4) =", square(4)
+    print "add(3, 7) =", add(3, 7)
+    
+    # Test keys and values functions (these work)
+    data["a"] = 1
+    data["b"] = 2
+    data["c"] = 3
+    key_count = keys(data)
+    value_count = values(data)
+    get_keys(data, key_array)
+    get_values(data, value_array)
+    print "keys(data) =", key_array[1], key_array[2], key_array[3]
+    print "values(data) =", value_array[1], value_array[2], value_array[3]
+    print "key count =", key_count, "value count =", value_count
+    
+    # Test nested function calls
+    print "double(square(3)) =", double(square(3))
+    print "square(double(3)) =", square(double(3))
+} 
\ No newline at end of file