1631 - update html versions

Html is a little more readable thanks to feedback from J David Eisenberg
(https://news.ycombinator.com/item?id=9766330), in particular the
suggestion to use https://addons.mozilla.org/En-us/firefox/addon/wcag-contrast-checker.

1 files changed, 570 insertions, 10 deletions

diff --git a/html/060string.mu.html b/html/060string.mu.html
index 43ecdd77..06164424 100644
--- a/html/060string.mu.html
+++ b/html/060string.mu.html
@@ -12,14 +12,14 @@
 <!--
 pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; }
 body { font-family: monospace; color: #eeeeee; background-color: #080808; }
-* { font-size: 1em; }
+* { font-size: 1.05em; }
 .muScenario { color: #00af00; }
-.Delimiter { color: #c000c0; }
-.Comment { color: #8080ff; }
-.Constant { color: #008080; }
+.Delimiter { color: #a04060; }
+.Comment { color: #9090ff; }
+.Constant { color: #00a0a0; }
 .Special { color: #ff6060; }
-.CommentedCode { color: #6c6c6c; }
-.muControl { color: #804000; }
+.Comment { color: #9090ff; }
+.muControl { color: #c0a020; }
 .muRecipe { color: #ff8700; }
 -->
 </style>
@@ -137,7 +137,7 @@ container buffer [
   data:address:array:character
 ]
 
-<span class="muRecipe">recipe</span> init-buffer [
+<span class="muRecipe">recipe</span> new-buffer [
   <span class="Constant">default-space</span>:address:array:location<span class="Special"> &lt;- </span>new location:type, <span class="Constant">30:literal</span>
 <span class="CommentedCode">#?   $print default-space:address:array:location, [</span>
 <span class="CommentedCode">#? ]</span>
@@ -216,7 +216,7 @@ container buffer [
 <span class="muScenario">scenario</span> buffer-append-works [
   run [
     <span class="Constant">default-space</span>:address:array:location<span class="Special"> &lt;- </span>new location:type, <span class="Constant">30:literal</span>
-    x:address:buffer<span class="Special"> &lt;- </span>init-buffer <span class="Constant">3:literal</span>
+    x:address:buffer<span class="Special"> &lt;- </span>new-buffer <span class="Constant">3:literal</span>
     s1:address:array:character<span class="Special"> &lt;- </span>get x:address:buffer/deref, data:offset
     x:address:buffer<span class="Special"> &lt;- </span>buffer-append x:address:buffer, <span class="Constant">97:literal</span>  <span class="Comment"># 'a'</span>
     x:address:buffer<span class="Special"> &lt;- </span>buffer-append x:address:buffer, <span class="Constant">98:literal</span>  <span class="Comment"># 'b'</span>
@@ -268,7 +268,7 @@ container buffer [
 <span class="muScenario">scenario</span> buffer-append-handles-backspace [
   run [
     <span class="Constant">default-space</span>:address:array:location<span class="Special"> &lt;- </span>new location:type, <span class="Constant">30:literal</span>
-    x:address:buffer<span class="Special"> &lt;- </span>init-buffer <span class="Constant">3:literal</span>
+    x:address:buffer<span class="Special"> &lt;- </span>new-buffer <span class="Constant">3:literal</span>
     x:address:buffer<span class="Special"> &lt;- </span>buffer-append x:address:buffer, <span class="Constant">97:literal</span>  <span class="Comment"># 'a'</span>
     x:address:buffer<span class="Special"> &lt;- </span>buffer-append x:address:buffer, <span class="Constant">98:literal</span>  <span class="Comment"># 'b'</span>
     x:address:buffer<span class="Special"> &lt;- </span>buffer-append x:address:buffer, <span class="Constant">8:literal/backspace</span>
@@ -301,7 +301,7 @@ container buffer [
     n:number<span class="Special"> &lt;- </span>multiply n:number, <span class="Constant">-1:literal</span>
   <span class="Delimiter">}</span>
   <span class="Comment"># add digits from right to left into intermediate buffer</span>
-  tmp:address:buffer<span class="Special"> &lt;- </span>init-buffer <span class="Constant">30:literal</span>
+  tmp:address:buffer<span class="Special"> &lt;- </span>new-buffer <span class="Constant">30:literal</span>
   digit-base:number<span class="Special"> &lt;- </span>copy <span class="Constant">48:literal</span>  <span class="Comment"># '0'</span>
   <span class="Delimiter">{</span>
     done?:boolean<span class="Special"> &lt;- </span>equal n:number, <span class="Constant">0:literal</span>
@@ -756,6 +756,566 @@ container buffer [
     3:string<span class="Special"> &lt;- </span><span class="Constant">[abc]</span>
   ]
 ]
+
+<span class="Comment"># next-index:number &lt;- find-next text:address:array:character, pattern:character</span>
+<span class="muRecipe">recipe</span> find-next [
+  <span class="Constant">default-space</span>:address:array:location<span class="Special"> &lt;- </span>new location:type, <span class="Constant">30:literal</span>
+  text:address:array:character<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  pattern:character<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  idx:number<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  len:number<span class="Special"> &lt;- </span>length text:address:array:character/deref
+  <span class="Delimiter">{</span>
+    eof?:boolean<span class="Special"> &lt;- </span>greater-or-equal idx:number, len:number
+    <span class="muControl">break-if</span> eof?:boolean
+    curr:character<span class="Special"> &lt;- </span>index text:address:array:character/deref, idx:number
+    found?:boolean<span class="Special"> &lt;- </span>equal curr:character, pattern:character
+    <span class="muControl">break-if</span> found?:boolean
+    idx:number<span class="Special"> &lt;- </span>add idx:number, <span class="Constant">1:literal</span>
+    <span class="muControl">loop</span>
+  <span class="Delimiter">}</span>
+  <span class="muControl">reply</span> idx:number
+]
+
+<span class="muScenario">scenario</span> string-find-next [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a/b]</span>
+    2:number<span class="Special"> &lt;- </span>find-next 1:address:array:character, <span class="Constant">47:literal/slash</span>, <span class="Constant">0:literal/start-index</span>
+  ]
+  memory-should-contain [
+    2<span class="Special"> &lt;- </span>1
+  ]
+]
+
+<span class="muScenario">scenario</span> string-find-next-empty [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[]</span>
+    2:number<span class="Special"> &lt;- </span>find-next 1:address:array:character, <span class="Constant">47:literal/slash</span>, <span class="Constant">0:literal/start-index</span>
+  ]
+  memory-should-contain [
+    2<span class="Special"> &lt;- </span>0
+  ]
+]
+
+<span class="muScenario">scenario</span> string-find-next-initial [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[/abc]</span>
+    2:number<span class="Special"> &lt;- </span>find-next 1:address:array:character, <span class="Constant">47:literal/slash</span>, <span class="Constant">0:literal/start-index</span>
+  ]
+  memory-should-contain [
+    2<span class="Special"> &lt;- </span>0  <span class="Comment"># prefix match</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> string-find-next-final [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc/]</span>
+    2:number<span class="Special"> &lt;- </span>find-next 1:address:array:character, <span class="Constant">47:literal/slash</span>, <span class="Constant">0:literal/start-index</span>
+  ]
+  memory-should-contain [
+    2<span class="Special"> &lt;- </span>3  <span class="Comment"># suffix match</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> string-find-next-missing [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:number<span class="Special"> &lt;- </span>find-next 1:address:array:character, <span class="Constant">47:literal/slash</span>, <span class="Constant">0:literal/start-index</span>
+  ]
+  memory-should-contain [
+    2<span class="Special"> &lt;- </span>3  <span class="Comment"># no match</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> string-find-next-invalid-index [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:number<span class="Special"> &lt;- </span>find-next 1:address:array:character, <span class="Constant">47:literal/slash</span>, <span class="Constant">4:literal/start-index</span>
+  ]
+  memory-should-contain [
+    2<span class="Special"> &lt;- </span>4  <span class="Comment"># no change</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> string-find-next-first [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[ab/c/]</span>
+    2:number<span class="Special"> &lt;- </span>find-next 1:address:array:character, <span class="Constant">47:literal/slash</span>, <span class="Constant">0:literal/start-index</span>
+  ]
+  memory-should-contain [
+    2<span class="Special"> &lt;- </span>2  <span class="Comment"># first '/' of multiple</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> string-find-next-second [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[ab/c/]</span>
+    2:number<span class="Special"> &lt;- </span>find-next 1:address:array:character, <span class="Constant">47:literal/slash</span>, <span class="Constant">3:literal/start-index</span>
+  ]
+  memory-should-contain [
+    2<span class="Special"> &lt;- </span>4  <span class="Comment"># second '/' of multiple</span>
+  ]
+]
+
+<span class="Comment"># like find-next, but searches for multiple characters</span>
+<span class="Comment"># fairly dumb algorithm</span>
+<span class="muRecipe">recipe</span> find-substring [
+  <span class="Constant">default-space</span>:address:array:location<span class="Special"> &lt;- </span>new location:type, <span class="Constant">30:literal</span>
+  text:address:array:character<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  pattern:address:array:character<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  idx:number<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  first:character<span class="Special"> &lt;- </span>index pattern:address:array:character/deref, <span class="Constant">0:literal</span>
+  <span class="Comment"># repeatedly check for match at current idx</span>
+  len:number<span class="Special"> &lt;- </span>length text:address:array:character/deref
+  <span class="Delimiter">{</span>
+    <span class="Comment"># does some unnecessary work checking for substrings even when there isn't enough of text left</span>
+    done?:boolean<span class="Special"> &lt;- </span>greater-or-equal idx:number, len:number
+    <span class="muControl">break-if</span> done?:boolean
+    found?:boolean<span class="Special"> &lt;- </span>match-at text:address:array:character pattern:address:array:character, idx:number
+    <span class="muControl">break-if</span> found?:boolean
+    idx:number<span class="Special"> &lt;- </span>add idx:number, <span class="Constant">1:literal</span>
+    <span class="Comment"># optimization: skip past indices that definitely won't match</span>
+    idx:number<span class="Special"> &lt;- </span>find-next text:address:array:character, first:character, idx:number
+    <span class="muControl">loop</span>
+  <span class="Delimiter">}</span>
+  <span class="muControl">reply</span> idx:number
+]
+
+<span class="muScenario">scenario</span> find-substring-1 [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[bc]</span>
+    3:number<span class="Special"> &lt;- </span>find-substring 1:address:array:character, 2:address:array:character, <span class="Constant">0:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>1
+  ]
+]
+
+<span class="muScenario">scenario</span> find-substring-2 [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcd]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[bc]</span>
+    3:number<span class="Special"> &lt;- </span>find-substring 1:address:array:character, 2:address:array:character, <span class="Constant">1:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>1
+  ]
+]
+
+<span class="muScenario">scenario</span> find-substring-no-match [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[bd]</span>
+    3:number<span class="Special"> &lt;- </span>find-substring 1:address:array:character, 2:address:array:character, <span class="Constant">0:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>3  <span class="Comment"># not found</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> find-substring-suffix-match [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcd]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[cd]</span>
+    3:number<span class="Special"> &lt;- </span>find-substring 1:address:array:character, 2:address:array:character, <span class="Constant">0:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>2
+  ]
+]
+
+<span class="muScenario">scenario</span> find-substring-suffix-match-2 [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcd]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[cde]</span>
+    3:number<span class="Special"> &lt;- </span>find-substring 1:address:array:character, 2:address:array:character, <span class="Constant">0:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>4  <span class="Comment"># not found</span>
+  ]
+]
+
+<span class="Comment"># result:boolean &lt;- match-at text:address:array:character, pattern:address:array:character, idx:number</span>
+<span class="Comment"># checks if substring matches at index 'idx'</span>
+<span class="muRecipe">recipe</span> match-at [
+  <span class="Constant">default-space</span>:address:array:location<span class="Special"> &lt;- </span>new location:type, <span class="Constant">30:literal</span>
+  text:address:array:character<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  pattern:address:array:character<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  idx:number<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  pattern-len:number<span class="Special"> &lt;- </span>length pattern:address:array:character/deref
+  <span class="Comment"># check that there's space left for the pattern</span>
+  <span class="Delimiter">{</span>
+    x:number<span class="Special"> &lt;- </span>length text:address:array:character/deref
+    x:number<span class="Special"> &lt;- </span>subtract x:number, pattern-len:number
+    enough-room?:boolean<span class="Special"> &lt;- </span>lesser-or-equal idx:number, x:number
+    <span class="muControl">break-if</span> enough-room?:boolean
+    <span class="muControl">reply</span> <span class="Constant">0:literal/not-found</span>
+  <span class="Delimiter">}</span>
+  <span class="Comment"># check each character of pattern</span>
+  pattern-idx:number<span class="Special"> &lt;- </span>copy <span class="Constant">0:literal</span>
+  <span class="Delimiter">{</span>
+    done?:boolean<span class="Special"> &lt;- </span>greater-or-equal pattern-idx:number, pattern-len:number
+    <span class="muControl">break-if</span> done?:boolean
+    c:character<span class="Special"> &lt;- </span>index text:address:array:character/deref, idx:number
+    exp:character<span class="Special"> &lt;- </span>index pattern:address:array:character/deref, pattern-idx:number
+    <span class="Delimiter">{</span>
+      match?:boolean<span class="Special"> &lt;- </span>equal c:character, exp:character
+      <span class="muControl">break-if</span> match?:boolean
+      <span class="muControl">reply</span> <span class="Constant">0:literal/not-found</span>
+    <span class="Delimiter">}</span>
+    idx:number<span class="Special"> &lt;- </span>add idx:number, <span class="Constant">1:literal</span>
+    pattern-idx:number<span class="Special"> &lt;- </span>add pattern-idx:number, <span class="Constant">1:literal</span>
+    <span class="muControl">loop</span>
+  <span class="Delimiter">}</span>
+  <span class="muControl">reply</span> <span class="Constant">1:literal/found</span>
+]
+
+<span class="muScenario">scenario</span> match-at-checks-substring-at-index [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[ab]</span>
+    3:boolean<span class="Special"> &lt;- </span>match-at 1:address:array:character, 2:address:array:character, <span class="Constant">0:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>1  <span class="Comment"># match found</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> match-at-reflexive [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    3:boolean<span class="Special"> &lt;- </span>match-at 1:address:array:character, 1:address:array:character, <span class="Constant">0:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>1  <span class="Comment"># match found</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> match-at-outside-bounds [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a]</span>
+    3:boolean<span class="Special"> &lt;- </span>match-at 1:address:array:character, 2:address:array:character, <span class="Constant">4:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>0  <span class="Comment"># never matches</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> match-at-empty-pattern [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[]</span>
+    3:boolean<span class="Special"> &lt;- </span>match-at 1:address:array:character, 2:address:array:character, <span class="Constant">0:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>1  <span class="Comment"># always matches empty pattern given a valid index</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> match-at-empty-pattern-outside-bound [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[]</span>
+    3:boolean<span class="Special"> &lt;- </span>match-at 1:address:array:character, 2:address:array:character, <span class="Constant">4:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>0  <span class="Comment"># no match</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> match-at-empty-text [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    3:boolean<span class="Special"> &lt;- </span>match-at 1:address:array:character, 2:address:array:character, <span class="Constant">0:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>0  <span class="Comment"># no match</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> match-at-empty-against-empty [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[]</span>
+    3:boolean<span class="Special"> &lt;- </span>match-at 1:address:array:character, 1:address:array:character, <span class="Constant">0:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>1  <span class="Comment"># matches because pattern is also empty</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> match-at-inside-bounds [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[bc]</span>
+    3:boolean<span class="Special"> &lt;- </span>match-at 1:address:array:character, 2:address:array:character, <span class="Constant">1:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>1  <span class="Comment"># matches inner substring</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> match-at-inside-bounds-2 [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[bc]</span>
+    3:boolean<span class="Special"> &lt;- </span>match-at 1:address:array:character, 2:address:array:character, <span class="Constant">0:literal</span>
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>0  <span class="Comment"># no match</span>
+  ]
+]
+
+<span class="Comment"># result:address:array:address:array:character &lt;- split s:address:array:character, delim:character</span>
+<span class="muRecipe">recipe</span> split [
+  <span class="Constant">default-space</span>:address:array:location<span class="Special"> &lt;- </span>new location:type, <span class="Constant">30:literal</span>
+  s:address:array:character<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  delim:character<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  <span class="Comment"># empty string? return empty array</span>
+  len:number<span class="Special"> &lt;- </span>length s:address:array:character/deref
+  <span class="Delimiter">{</span>
+    empty?:boolean<span class="Special"> &lt;- </span>equal len:number, <span class="Constant">0:literal</span>
+    <span class="muControl">break-unless</span> empty?:boolean
+    result:address:array:address:array:character<span class="Special"> &lt;- </span>new location:type, <span class="Constant">0:literal</span>
+    <span class="muControl">reply</span> result:address:array:address:array:character
+  <span class="Delimiter">}</span>
+  <span class="Comment"># count #pieces we need room for</span>
+  count:number<span class="Special"> &lt;- </span>copy <span class="Constant">1:literal</span>  <span class="Comment"># n delimiters = n+1 pieces</span>
+  idx:number<span class="Special"> &lt;- </span>copy <span class="Constant">0:literal</span>
+  <span class="Delimiter">{</span>
+    idx:number<span class="Special"> &lt;- </span>find-next s:address:array:character, delim:character, idx:number
+    done?:boolean<span class="Special"> &lt;- </span>greater-or-equal idx:number, len:number
+    <span class="muControl">break-if</span> done?:boolean
+    idx:number<span class="Special"> &lt;- </span>add idx:number, <span class="Constant">1:literal</span>
+    count:number<span class="Special"> &lt;- </span>add count:number, <span class="Constant">1:literal</span>
+    <span class="muControl">loop</span>
+  <span class="Delimiter">}</span>
+  <span class="Comment"># allocate space</span>
+  result:address:array:address:array:character<span class="Special"> &lt;- </span>new location:type, count:number
+  <span class="Comment"># repeatedly copy slices start..end until delimiter into result[curr-result]</span>
+  curr-result:number<span class="Special"> &lt;- </span>copy <span class="Constant">0:literal</span>
+  start:number<span class="Special"> &lt;- </span>copy <span class="Constant">0:literal</span>
+  <span class="Delimiter">{</span>
+    <span class="Comment"># while next delim exists</span>
+    done?:boolean<span class="Special"> &lt;- </span>greater-or-equal start:number, len:number
+    <span class="muControl">break-if</span> done?:boolean
+    end:number<span class="Special"> &lt;- </span>find-next s:address:array:character, delim:character, start:number
+    <span class="Comment"># copy start..end into result[curr-result]</span>
+    dest:address:address:array:character<span class="Special"> &lt;- </span>index-address result:address:array:address:array:character/deref, curr-result:number
+    dest:address:address:array:character/deref<span class="Special"> &lt;- </span>string-copy s:address:array:character, start:number, end:number
+    <span class="Comment"># slide over to next slice</span>
+    start:number<span class="Special"> &lt;- </span>add end:number, <span class="Constant">1:literal</span>
+    curr-result:number<span class="Special"> &lt;- </span>add curr-result:number, <span class="Constant">1:literal</span>
+    <span class="muControl">loop</span>
+  <span class="Delimiter">}</span>
+  <span class="muControl">reply</span> result:address:array:address:array:character
+]
+
+<span class="muScenario">scenario</span> string-split-1 [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a/b]</span>
+    2:address:array:address:array:character<span class="Special"> &lt;- </span>split 1:address:array:character, <span class="Constant">47:literal/slash</span>
+    3:number<span class="Special"> &lt;- </span>length 2:address:array:address:array:character/deref
+    4:address:array:character<span class="Special"> &lt;- </span>index 2:address:array:address:array:character/deref, <span class="Constant">0:literal</span>
+    5:address:array:character<span class="Special"> &lt;- </span>index 2:address:array:address:array:character/deref, <span class="Constant">1:literal</span>
+    10:array:character<span class="Special"> &lt;- </span>copy 4:address:array:character/deref
+    20:array:character<span class="Special"> &lt;- </span>copy 5:address:array:character/deref
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>2  <span class="Comment"># length of result</span>
+    10:string<span class="Special"> &lt;- </span><span class="Constant">[a]</span>
+    20:string<span class="Special"> &lt;- </span><span class="Constant">[b]</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> string-split-2 [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a/b/c]</span>
+    2:address:array:address:array:character<span class="Special"> &lt;- </span>split 1:address:array:character, <span class="Constant">47:literal/slash</span>
+    3:number<span class="Special"> &lt;- </span>length 2:address:array:address:array:character/deref
+    4:address:array:character<span class="Special"> &lt;- </span>index 2:address:array:address:array:character/deref, <span class="Constant">0:literal</span>
+    5:address:array:character<span class="Special"> &lt;- </span>index 2:address:array:address:array:character/deref, <span class="Constant">1:literal</span>
+    6:address:array:character<span class="Special"> &lt;- </span>index 2:address:array:address:array:character/deref, <span class="Constant">2:literal</span>
+    10:array:character<span class="Special"> &lt;- </span>copy 4:address:array:character/deref
+    20:array:character<span class="Special"> &lt;- </span>copy 5:address:array:character/deref
+    30:array:character<span class="Special"> &lt;- </span>copy 6:address:array:character/deref
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>3  <span class="Comment"># length of result</span>
+    10:string<span class="Special"> &lt;- </span><span class="Constant">[a]</span>
+    20:string<span class="Special"> &lt;- </span><span class="Constant">[b]</span>
+    30:string<span class="Special"> &lt;- </span><span class="Constant">[c]</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> string-split-missing [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:address:array:character<span class="Special"> &lt;- </span>split 1:address:array:character, <span class="Constant">47:literal/slash</span>
+    3:number<span class="Special"> &lt;- </span>length 2:address:array:address:array:character/deref
+    4:address:array:character<span class="Special"> &lt;- </span>index 2:address:array:address:array:character/deref, <span class="Constant">0:literal</span>
+    10:array:character<span class="Special"> &lt;- </span>copy 4:address:array:character/deref
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>1  <span class="Comment"># length of result</span>
+    10:string<span class="Special"> &lt;- </span><span class="Constant">[abc]</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> string-split-empty [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[]</span>
+    2:address:array:address:array:character<span class="Special"> &lt;- </span>split 1:address:array:character, <span class="Constant">47:literal/slash</span>
+    3:number<span class="Special"> &lt;- </span>length 2:address:array:address:array:character/deref
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>0  <span class="Comment"># empty result</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> string-split-empty-piece [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a/b//c]</span>
+    2:address:array:address:array:character<span class="Special"> &lt;- </span>split 1:address:array:character, <span class="Constant">47:literal/slash</span>
+    3:number<span class="Special"> &lt;- </span>length 2:address:array:address:array:character/deref
+    4:address:array:character<span class="Special"> &lt;- </span>index 2:address:array:address:array:character/deref, <span class="Constant">0:literal</span>
+    5:address:array:character<span class="Special"> &lt;- </span>index 2:address:array:address:array:character/deref, <span class="Constant">1:literal</span>
+    6:address:array:character<span class="Special"> &lt;- </span>index 2:address:array:address:array:character/deref, <span class="Constant">2:literal</span>
+    7:address:array:character<span class="Special"> &lt;- </span>index 2:address:array:address:array:character/deref, <span class="Constant">3:literal</span>
+    10:array:character<span class="Special"> &lt;- </span>copy 4:address:array:character/deref
+    20:array:character<span class="Special"> &lt;- </span>copy 5:address:array:character/deref
+    30:array:character<span class="Special"> &lt;- </span>copy 6:address:array:character/deref
+    40:array:character<span class="Special"> &lt;- </span>copy 7:address:array:character/deref
+  ]
+  memory-should-contain [
+    3<span class="Special"> &lt;- </span>4  <span class="Comment"># length of result</span>
+    10:string<span class="Special"> &lt;- </span><span class="Constant">[a]</span>
+    20:string<span class="Special"> &lt;- </span><span class="Constant">[b]</span>
+    30:string<span class="Special"> &lt;- </span><span class="Constant">[]</span>
+    40:string<span class="Special"> &lt;- </span><span class="Constant">[c]</span>
+  ]
+]
+
+<span class="Comment"># x:address:array:character, y:address:array:character &lt;- split-first text:address:array:character, delim:character</span>
+<span class="muRecipe">recipe</span> split-first [
+  <span class="Constant">default-space</span>:address:array:location<span class="Special"> &lt;- </span>new location:type, <span class="Constant">30:literal</span>
+  text:address:array:character<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  delim:character<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  <span class="Comment"># empty string? return empty strings</span>
+  len:number<span class="Special"> &lt;- </span>length text:address:array:character/deref
+  <span class="Delimiter">{</span>
+    empty?:boolean<span class="Special"> &lt;- </span>equal len:number, <span class="Constant">0:literal</span>
+    <span class="muControl">break-unless</span> empty?:boolean
+    x:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[]</span>
+    y:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[]</span>
+    <span class="muControl">reply</span> x:address:array:character, y:address:array:character
+  <span class="Delimiter">}</span>
+  idx:number<span class="Special"> &lt;- </span>find-next text:address:array:character, delim:character, <span class="Constant">0:literal</span>
+  x:address:array:character<span class="Special"> &lt;- </span>string-copy text:address:array:character, <span class="Constant">0:literal</span>, idx:number
+  idx:number<span class="Special"> &lt;- </span>add idx:number, <span class="Constant">1:literal</span>
+  y:address:array:character<span class="Special"> &lt;- </span>string-copy text:address:array:character, idx:number, len:number
+  <span class="muControl">reply</span> x:address:array:character, y:address:array:character
+]
+
+<span class="muScenario">scenario</span> string-split-first [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a/b]</span>
+    2:address:array:character, 3:address:array:character<span class="Special"> &lt;- </span>split-first 1:address:array:character, <span class="Constant">47:literal/slash</span>
+    10:array:character<span class="Special"> &lt;- </span>copy 2:address:array:character/deref
+    20:array:character<span class="Special"> &lt;- </span>copy 3:address:array:character/deref
+  ]
+  memory-should-contain [
+    10:string<span class="Special"> &lt;- </span><span class="Constant">[a]</span>
+    20:string<span class="Special"> &lt;- </span><span class="Constant">[b]</span>
+  ]
+]
+
+<span class="Comment"># result:address:array:character &lt;- string-copy buf:address:array:character, start:number, end:number</span>
+<span class="Comment"># todo: make this generic</span>
+<span class="muRecipe">recipe</span> string-copy [
+  <span class="Constant">default-space</span>:address:array:location<span class="Special"> &lt;- </span>new location:type, <span class="Constant">30:literal</span>
+  buf:address:array:character<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  start:number<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  end:number<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  <span class="Comment"># if end is out of bounds, trim it</span>
+  len:number<span class="Special"> &lt;- </span>length buf:address:array:character/deref
+  end:number<span class="Special"> &lt;- </span>min len:number, end:number
+  <span class="Comment"># allocate space for result</span>
+  len:number<span class="Special"> &lt;- </span>subtract end:number, start:number
+  result:address:array:character<span class="Special"> &lt;- </span>new character:type, len:number
+  <span class="Comment"># copy start..end into result[curr-result]</span>
+  src-idx:number<span class="Special"> &lt;- </span>copy start:number
+  dest-idx:number<span class="Special"> &lt;- </span>copy <span class="Constant">0:literal</span>
+  <span class="Delimiter">{</span>
+    done?:boolean<span class="Special"> &lt;- </span>greater-or-equal src-idx:number, end:number
+    <span class="muControl">break-if</span> done?:boolean
+    src:character<span class="Special"> &lt;- </span>index buf:address:array:character/deref, src-idx:number
+    dest:address:character<span class="Special"> &lt;- </span>index-address result:address:array:character/deref, dest-idx:number
+    dest:address:character/deref<span class="Special"> &lt;- </span>copy src:character
+    src-idx:number<span class="Special"> &lt;- </span>add src-idx:number, <span class="Constant">1:literal</span>
+    dest-idx:number<span class="Special"> &lt;- </span>add dest-idx:number, <span class="Constant">1:literal</span>
+    <span class="muControl">loop</span>
+  <span class="Delimiter">}</span>
+  <span class="muControl">reply</span> result:address:array:character
+]
+
+<span class="muScenario">scenario</span> string-copy-copies-substring [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>string-copy 1:address:array:character, <span class="Constant">1:literal</span>, <span class="Constant">3:literal</span>
+    3:array:character<span class="Special"> &lt;- </span>copy 2:address:array:character/deref
+  ]
+  memory-should-contain [
+    3:string<span class="Special"> &lt;- </span><span class="Constant">[bc]</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> string-copy-out-of-bounds [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>string-copy 1:address:array:character, <span class="Constant">2:literal</span>, <span class="Constant">4:literal</span>
+    3:array:character<span class="Special"> &lt;- </span>copy 2:address:array:character/deref
+  ]
+  memory-should-contain [
+    3:string<span class="Special"> &lt;- </span><span class="Constant">[c]</span>
+  ]
+]
+
+<span class="muScenario">scenario</span> string-copy-out-of-bounds-2 [
+  run [
+    1:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+    2:address:array:character<span class="Special"> &lt;- </span>string-copy 1:address:array:character, <span class="Constant">3:literal</span>, <span class="Constant">3:literal</span>
+    3:array:character<span class="Special"> &lt;- </span>copy 2:address:array:character/deref
+  ]
+  memory-should-contain [
+    3:string<span class="Special"> &lt;- </span><span class="Constant">[]</span>
+  ]
+]
+
+<span class="muRecipe">recipe</span> min [
+  <span class="Constant">default-space</span>:address:array:location<span class="Special"> &lt;- </span>new location:type, <span class="Constant">30:literal</span>
+  x:number<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  y:number<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  <span class="Delimiter">{</span>
+    return-x?:boolean<span class="Special"> &lt;- </span>lesser-than x:number, y:number
+    <span class="muControl">break-if</span> return-x?:boolean
+    <span class="muControl">reply</span> y:number
+  <span class="Delimiter">}</span>
+  <span class="muControl">reply</span> x:number
+]
+
+<span class="muRecipe">recipe</span> max [
+  <span class="Constant">default-space</span>:address:array:location<span class="Special"> &lt;- </span>new location:type, <span class="Constant">30:literal</span>
+  x:number<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  y:number<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  <span class="Delimiter">{</span>
+    return-x?:boolean<span class="Special"> &lt;- </span>greater-than x:number, y:number
+    <span class="muControl">break-if</span> return-x?:boolean
+    <span class="muControl">reply</span> y:number
+  <span class="Delimiter">}</span>
+  <span class="muControl">reply</span> x:number
+]
 </pre>
 </body>
 </html>