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Diffstat (limited to 'html')
| -rw-r--r-- | html/playground/little-regex.html | 728 |
1 files changed, 728 insertions, 0 deletions
diff --git a/html/playground/little-regex.html b/html/playground/little-regex.html new file mode 100644 index 0000000..c09139f --- /dev/null +++ b/html/playground/little-regex.html @@ -0,0 +1,728 @@ +<html lang="en"><head> + <meta charset="UTF-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + <title>JavaScript Playground</title> + <meta name="description" content="A JavaScript jungle-gym for doing experiments and sharing scrappy fiddles."> + <style> + body { + display: flex; + flex-direction: column; + align-items: center; + background-color: #ddd; + padding: 10px; + height: 100vh; + margin: 0; + } + + textarea { + width: 100%; + height: 64%; + font-family: monospace; + background-color: #FFFEEC; + border: 2px solid #000; + scrollbar-width: none; + font-size: 1rem; + margin-bottom: 10px; + padding: 10px; + box-sizing: border-box; + resize: none; + border-bottom: 12px solid teal; + -webkit-user-modify: read-write-plaintext-only; + } + + textarea::-webkit-scrollbar { + display: none; + } + + textarea::selection { + background-color: #EFECA7; + } + + textarea:focus { + outline: none; + } + + #console { + width: 100%; + height: 22%; + background-color: #000; + color: #0fc; + font-family: monospace; + font-size: 1rem; + overflow-y: auto; + padding: 10px; + box-sizing: border-box; + white-space: pre-wrap; + } + + .button-container { + width: 100%; + display: flex; + justify-content: flex-end; + margin-bottom: 10px; + } + + button { + padding: 10px 20px; + font-size: 1rem; + margin-left: 10px; + cursor: pointer; + border: none; + transition: background-color 0.3s ease; + } + + button:hover, button:focus { + outline: none; + } + + button.run { + background-color: teal; + color: #FFFFFF; + } + </style> +</head> +<body> + + <div class="playground" id="playground"> + <div class="seesaw" id="seesaw"></div> + <div class="slide" id="slide"></div> + </div> + + <div class="button-container"> + <button onclick="clearEverything()">Clear</button> + <button onclick="downloadCodeAndEditor()">Download</button> + <button onclick="shareCode()">Share</button> + <button onclick="evaluateCode()" class="run">Run Code</button> + </div> + <textarea id="codeInput">// Inspired by <https://www.cs.princeton.edu/courses/archive/spr09/cos333/beautiful.html> +const matchHere = (pattern, text) => { + if (pattern.length === 0) return true; + + // If pattern ends with $, match end of string + if (pattern[0] === ' + <div id="console"></div> + + <script> + function evaluateCode() { + const code = document.getElementById('codeInput').value; + const consoleDiv = document.getElementById('console'); + consoleDiv.innerHTML = ''; + + // Custom console.log function to output to the console div + const originalConsoleLog = console.log; + console.log = function(...args) { + args.forEach(arg => { + const output = document.createElement('div'); + output.textContent = typeof arg === 'object' ? JSON.stringify(arg, null, 2) : arg; + consoleDiv.appendChild(output); + }); + originalConsoleLog.apply(console, args); + }; + + try { + eval(code); + } catch (error) { + const errorOutput = document.createElement('div'); + errorOutput.textContent = error; + errorOutput.style.color = 'red'; + consoleDiv.appendChild(errorOutput); + } + + // Restore browser's console.log + console.log = originalConsoleLog; + } + + function downloadCodeAndEditor() { + const codeInput = document.getElementById('codeInput').value; + const htmlContent = document.documentElement.outerHTML.replace( + /<textarea id="codeInput"[^>]*>.*<\/textarea>/, + `<textarea id="codeInput">${codeInput}</textarea>` + ); + + const blob = new Blob([htmlContent], { type: 'text/html' }); + const url = URL.createObjectURL(blob); + const a = document.createElement('a'); + a.href = url; + a.download = 'code_editor.html'; + document.body.appendChild(a); + a.click(); + document.body.removeChild(a); + URL.revokeObjectURL(url); + } + + function shareCode() { + const code = document.getElementById('codeInput').value; + const encodedCode = btoa(encodeURIComponent(code)); + window.location.hash = encodedCode; + window.prompt("Copy the URL to share.\nBe warned! Very long URLs don't share wicked well, sometimes.", window.location.href); + } + + function clearEverything() { + if (!confirm('Are you sure you want to reset the playground?')) { + return; + } else { + window.location.hash = ''; + window.location.reload(); + } + } + + function loadCodeFromHash() { + const hash = window.location.hash.substring(1); + if (hash) { + try { + const decodedCode = decodeURIComponent(atob(hash)); + document.getElementById('codeInput').value = decodedCode; + } catch (error) { + console.error('Failed to decode the URL hash:', error); + } + } + } + + function help() { + const helpText = ` + Welcome to the JavaScript Playground! Here are some tips to get you started: + + 1. Enter your JavaScript code in the textarea. + 2. Click the "Run Code" button to execute your code. + 3. The console output will be displayed below the textarea. + 4. Click the "Clear" button to reset the playground. + 5. Click the "Download" button to save your code and editor as an HTML file. + 6. Click the "Share" button to generate a URL to share your code with others. + 7. You can also press "Cmd + Enter" to run your code. + 8. There's an empty div above the buttons with the id "playground" + 9. You can mount stuff to it using the "mount" function, for more info run "mountHelp()" + 10. You can use the "clear()" function to clear the content's of the console. + + Go nuts! Share scrappy fiddles! + `; + console.log(helpText); + } + + function clear() { + document.getElementById('console').innerHTML = ''; + } + + function mountHelp() { + console.log(` + The mount function is used to mount stuff to the playground div. + It takes a function as an argument, which in turn receives the playground div as an argument. + Before mounting, it clears the playground div. + Here's an example of how to use the mount function: + + mount(playground => { + const h1 = document.createElement('h1'); + h1.textContent = 'Hell is empty and all the devils are here.'; + playground.appendChild(h1); + }); + + This will add an h1 element to the playground div. + `); + } + + function mount(mountFunction) { + const playground = document.getElementById('playground'); + if (!playground) { + console.error("Couldn't find a div with the id 'playground'! You may need to reload the page."); + return; + } + + if (playground.innerHTML.trim() !== "") { + playground.innerHTML = ""; + } + mountFunction(playground); + } + + + document.getElementById('codeInput').addEventListener('keydown', function(event) { + if (event.metaKey && event.key === 'Enter') { + event.preventDefault(); + evaluateCode(); + } + }); + + window.onload = loadCodeFromHash; + </script> + + +</body></html> && pattern.length === 1) return text.length === 0; + + // If next char is '*', match zero or more occurrences of prev char + if (pattern[1] === '*') return matchStar(pattern[0], pattern.slice(2), text); + + // Match . or literal character + if (text.length !== 0 && (pattern[0] === '.' || pattern[0] === text[0])) { + return matchHere(pattern.slice(1), text.slice(1)); + } + + return false; +}; + +const matchStar = (prevChar, pattern, text) => { + // Try matching zero occurrences first + if (matchHere(pattern, text)) return true; + + // Then, match one or more occurrences of prevChar + while (text.length > 0 && (text[0] === prevChar || prevChar === '.')) { + text = text.slice(1); + if (matchHere(pattern, text)) return true; + } + + return false; +}; + +const match = (pattern, text) => { + // Handle ^ anchor at the beginning + if (pattern[0] === '^') { + return matchHere(pattern.slice(1), text); + } + + // Otherwise, check the entire string + for (let i = 0; i <= text.length; i++) { + if (matchHere(pattern, text.slice(i))) return true; + } + + return false; +}; + +const assertEqual = (actual, expected, testName) => + console.log(actual === expected ? `Passed: ${testName}` : `Failed: ${testName}. Expected ${expected} but got ${actual}`); + +assertEqual(match("ab*c", "ac"), true, "Star match 'ab*c' vs 'ac' (zero occurrences)"); +assertEqual(match("ab*c", "abbbc"), true, "Star match 'ab*c' vs 'abbbc' (multiple occurrences)"); +assertEqual(match("^ab.*c$", "abc"), true, "Complex match '^ab.*c + <div id="console"></div> + + <script> + function evaluateCode() { + const code = document.getElementById('codeInput').value; + const consoleDiv = document.getElementById('console'); + consoleDiv.innerHTML = ''; + + // Custom console.log function to output to the console div + const originalConsoleLog = console.log; + console.log = function(...args) { + args.forEach(arg => { + const output = document.createElement('div'); + output.textContent = typeof arg === 'object' ? JSON.stringify(arg, null, 2) : arg; + consoleDiv.appendChild(output); + }); + originalConsoleLog.apply(console, args); + }; + + try { + eval(code); + } catch (error) { + const errorOutput = document.createElement('div'); + errorOutput.textContent = error; + errorOutput.style.color = 'red'; + consoleDiv.appendChild(errorOutput); + } + + // Restore browser's console.log + console.log = originalConsoleLog; + } + + function downloadCodeAndEditor() { + const codeInput = document.getElementById('codeInput').value; + const htmlContent = document.documentElement.outerHTML.replace( + /<textarea id="codeInput"[^>]*>.*<\/textarea>/, + `<textarea id="codeInput">${codeInput}</textarea>` + ); + + const blob = new Blob([htmlContent], { type: 'text/html' }); + const url = URL.createObjectURL(blob); + const a = document.createElement('a'); + a.href = url; + a.download = 'code_editor.html'; + document.body.appendChild(a); + a.click(); + document.body.removeChild(a); + URL.revokeObjectURL(url); + } + + function shareCode() { + const code = document.getElementById('codeInput').value; + const encodedCode = btoa(encodeURIComponent(code)); + window.location.hash = encodedCode; + window.prompt("Copy the URL to share.\nBe warned! Very long URLs don't share wicked well, sometimes.", window.location.href); + } + + function clearEverything() { + if (!confirm('Are you sure you want to reset the playground?')) { + return; + } else { + window.location.hash = ''; + window.location.reload(); + } + } + + function loadCodeFromHash() { + const hash = window.location.hash.substring(1); + if (hash) { + try { + const decodedCode = decodeURIComponent(atob(hash)); + document.getElementById('codeInput').value = decodedCode; + } catch (error) { + console.error('Failed to decode the URL hash:', error); + } + } + } + + function help() { + const helpText = ` + Welcome to the JavaScript Playground! Here are some tips to get you started: + + 1. Enter your JavaScript code in the textarea. + 2. Click the "Run Code" button to execute your code. + 3. The console output will be displayed below the textarea. + 4. Click the "Clear" button to reset the playground. + 5. Click the "Download" button to save your code and editor as an HTML file. + 6. Click the "Share" button to generate a URL to share your code with others. + 7. You can also press "Cmd + Enter" to run your code. + 8. There's an empty div above the buttons with the id "playground" + 9. You can mount stuff to it using the "mount" function, for more info run "mountHelp()" + 10. You can use the "clear()" function to clear the content's of the console. + + Go nuts! Share scrappy fiddles! + `; + console.log(helpText); + } + + function clear() { + document.getElementById('console').innerHTML = ''; + } + + function mountHelp() { + console.log(` + The mount function is used to mount stuff to the playground div. + It takes a function as an argument, which in turn receives the playground div as an argument. + Before mounting, it clears the playground div. + Here's an example of how to use the mount function: + + mount(playground => { + const h1 = document.createElement('h1'); + h1.textContent = 'Hell is empty and all the devils are here.'; + playground.appendChild(h1); + }); + + This will add an h1 element to the playground div. + `); + } + + function mount(mountFunction) { + const playground = document.getElementById('playground'); + if (!playground) { + console.error("Couldn't find a div with the id 'playground'! You may need to reload the page."); + return; + } + + if (playground.innerHTML.trim() !== "") { + playground.innerHTML = ""; + } + mountFunction(playground); + } + + + document.getElementById('codeInput').addEventListener('keydown', function(event) { + if (event.metaKey && event.key === 'Enter') { + event.preventDefault(); + evaluateCode(); + } + }); + + window.onload = loadCodeFromHash; + </script> + + +</body></html> vs 'abc'"); +assertEqual(match("^ab.*c$", "abcd"), false, "Complex mismatch '^ab.*c + <div id="console"></div> + + <script> + function evaluateCode() { + const code = document.getElementById('codeInput').value; + const consoleDiv = document.getElementById('console'); + consoleDiv.innerHTML = ''; + + // Custom console.log function to output to the console div + const originalConsoleLog = console.log; + console.log = function(...args) { + args.forEach(arg => { + const output = document.createElement('div'); + output.textContent = typeof arg === 'object' ? JSON.stringify(arg, null, 2) : arg; + consoleDiv.appendChild(output); + }); + originalConsoleLog.apply(console, args); + }; + + try { + eval(code); + } catch (error) { + const errorOutput = document.createElement('div'); + errorOutput.textContent = error; + errorOutput.style.color = 'red'; + consoleDiv.appendChild(errorOutput); + } + + // Restore browser's console.log + console.log = originalConsoleLog; + } + + function downloadCodeAndEditor() { + const codeInput = document.getElementById('codeInput').value; + const htmlContent = document.documentElement.outerHTML.replace( + /<textarea id="codeInput"[^>]*>.*<\/textarea>/, + `<textarea id="codeInput">${codeInput}</textarea>` + ); + + const blob = new Blob([htmlContent], { type: 'text/html' }); + const url = URL.createObjectURL(blob); + const a = document.createElement('a'); + a.href = url; + a.download = 'code_editor.html'; + document.body.appendChild(a); + a.click(); + document.body.removeChild(a); + URL.revokeObjectURL(url); + } + + function shareCode() { + const code = document.getElementById('codeInput').value; + const encodedCode = btoa(encodeURIComponent(code)); + window.location.hash = encodedCode; + window.prompt("Copy the URL to share.\nBe warned! Very long URLs don't share wicked well, sometimes.", window.location.href); + } + + function clearEverything() { + if (!confirm('Are you sure you want to reset the playground?')) { + return; + } else { + window.location.hash = ''; + window.location.reload(); + } + } + + function loadCodeFromHash() { + const hash = window.location.hash.substring(1); + if (hash) { + try { + const decodedCode = decodeURIComponent(atob(hash)); + document.getElementById('codeInput').value = decodedCode; + } catch (error) { + console.error('Failed to decode the URL hash:', error); + } + } + } + + function help() { + const helpText = ` + Welcome to the JavaScript Playground! Here are some tips to get you started: + + 1. Enter your JavaScript code in the textarea. + 2. Click the "Run Code" button to execute your code. + 3. The console output will be displayed below the textarea. + 4. Click the "Clear" button to reset the playground. + 5. Click the "Download" button to save your code and editor as an HTML file. + 6. Click the "Share" button to generate a URL to share your code with others. + 7. You can also press "Cmd + Enter" to run your code. + 8. There's an empty div above the buttons with the id "playground" + 9. You can mount stuff to it using the "mount" function, for more info run "mountHelp()" + 10. You can use the "clear()" function to clear the content's of the console. + + Go nuts! Share scrappy fiddles! + `; + console.log(helpText); + } + + function clear() { + document.getElementById('console').innerHTML = ''; + } + + function mountHelp() { + console.log(` + The mount function is used to mount stuff to the playground div. + It takes a function as an argument, which in turn receives the playground div as an argument. + Before mounting, it clears the playground div. + Here's an example of how to use the mount function: + + mount(playground => { + const h1 = document.createElement('h1'); + h1.textContent = 'Hell is empty and all the devils are here.'; + playground.appendChild(h1); + }); + + This will add an h1 element to the playground div. + `); + } + + function mount(mountFunction) { + const playground = document.getElementById('playground'); + if (!playground) { + console.error("Couldn't find a div with the id 'playground'! You may need to reload the page."); + return; + } + + if (playground.innerHTML.trim() !== "") { + playground.innerHTML = ""; + } + mountFunction(playground); + } + + + document.getElementById('codeInput').addEventListener('keydown', function(event) { + if (event.metaKey && event.key === 'Enter') { + event.preventDefault(); + evaluateCode(); + } + }); + + window.onload = loadCodeFromHash; + </script> + + +</body></html> vs 'abcd'");</textarea> + <div id="console"></div> + + <script> + function evaluateCode() { + const code = document.getElementById('codeInput').value; + const consoleDiv = document.getElementById('console'); + consoleDiv.innerHTML = ''; + + // Custom console.log function to output to the console div + const originalConsoleLog = console.log; + console.log = function(...args) { + args.forEach(arg => { + const output = document.createElement('div'); + output.textContent = typeof arg === 'object' ? JSON.stringify(arg, null, 2) : arg; + consoleDiv.appendChild(output); + }); + originalConsoleLog.apply(console, args); + }; + + try { + eval(code); + } catch (error) { + const errorOutput = document.createElement('div'); + errorOutput.textContent = error; + errorOutput.style.color = 'red'; + consoleDiv.appendChild(errorOutput); + } + + // Restore browser's console.log + console.log = originalConsoleLog; + } + + function downloadCodeAndEditor() { + const codeInput = document.getElementById('codeInput').value; + const htmlContent = document.documentElement.outerHTML.replace( + /<textarea id="codeInput"[^>]*>.*<\/textarea>/, + `<textarea id="codeInput">${codeInput}</textarea>` + ); + + const blob = new Blob([htmlContent], { type: 'text/html' }); + const url = URL.createObjectURL(blob); + const a = document.createElement('a'); + a.href = url; + a.download = 'code_editor.html'; + document.body.appendChild(a); + a.click(); + document.body.removeChild(a); + URL.revokeObjectURL(url); + } + + function shareCode() { + const code = document.getElementById('codeInput').value; + const encodedCode = btoa(encodeURIComponent(code)); + window.location.hash = encodedCode; + window.prompt("Copy the URL to share.\nBe warned! Very long URLs don't share wicked well, sometimes.", window.location.href); + } + + function clearEverything() { + if (!confirm('Are you sure you want to reset the playground?')) { + return; + } else { + window.location.hash = ''; + window.location.reload(); + } + } + + function loadCodeFromHash() { + const hash = window.location.hash.substring(1); + if (hash) { + try { + const decodedCode = decodeURIComponent(atob(hash)); + document.getElementById('codeInput').value = decodedCode; + } catch (error) { + console.error('Failed to decode the URL hash:', error); + } + } + } + + function help() { + const helpText = ` + Welcome to the JavaScript Playground! Here are some tips to get you started: + + 1. Enter your JavaScript code in the textarea. + 2. Click the "Run Code" button to execute your code. + 3. The console output will be displayed below the textarea. + 4. Click the "Clear" button to reset the playground. + 5. Click the "Download" button to save your code and editor as an HTML file. + 6. Click the "Share" button to generate a URL to share your code with others. + 7. You can also press "Cmd + Enter" to run your code. + 8. There's an empty div above the buttons with the id "playground" + 9. You can mount stuff to it using the "mount" function, for more info run "mountHelp()" + 10. You can use the "clear()" function to clear the content's of the console. + + Go nuts! Share scrappy fiddles! + `; + console.log(helpText); + } + + function clear() { + document.getElementById('console').innerHTML = ''; + } + + function mountHelp() { + console.log(` + The mount function is used to mount stuff to the playground div. + It takes a function as an argument, which in turn receives the playground div as an argument. + Before mounting, it clears the playground div. + Here's an example of how to use the mount function: + + mount(playground => { + const h1 = document.createElement('h1'); + h1.textContent = 'Hell is empty and all the devils are here.'; + playground.appendChild(h1); + }); + + This will add an h1 element to the playground div. + `); + } + + function mount(mountFunction) { + const playground = document.getElementById('playground'); + if (!playground) { + console.error("Couldn't find a div with the id 'playground'! You may need to reload the page."); + return; + } + + if (playground.innerHTML.trim() !== "") { + playground.innerHTML = ""; + } + mountFunction(playground); + } + + + document.getElementById('codeInput').addEventListener('keydown', function(event) { + if (event.metaKey && event.key === 'Enter') { + event.preventDefault(); + evaluateCode(); + } + }); + + window.onload = loadCodeFromHash; + </script> + + +</body></html> \ No newline at end of file |