highlighting matches (v2)

Revision 2 of this benchmark created on

Setup

function splitByAndKeep(text, delimiters) {
  const splitString = [];
  let currentToken = [];
  const delimiterSet = new Set(delimiters);

  for (const char of text) {
    if (delimiterSet.has(char)) {
      if (currentToken.length > 0) {
        splitString.push(currentToken.join(""));
      }
      splitString.push(char);
      currentToken = [];
    } else {
      currentToken.push(char);
    }
  }

  if (currentToken.length > 0) {
    splitString.push(currentToken.join(""));
  }

  return splitString;
}

const matchedText = ["const", "function", "name"];

const quotes = ["//a function that generates random gibberish at random length\n\nexport function getGibberish() {\n\tlet randLen = Math.floor(Math.random() * 7) + 1;\n\tlet ret = \"\";\n\tfor (let i = 0; i < randLen; i++) {\n\t\tret += String.fromCharCode(97 + Math.floor(Math.random() * 26));\n\t}\n\treturn ret;\n}", "export function capitalizeFirstLetter(str) {\n\treturn str.charAt(0).toUpperCase() + str.slice(1);\n}", "export function roundTo2(num) {\n\treturn Math.round((num + Number.EPSILON) * 100) / 100;\n}", "export default function App(props) {\n\treturn (\n\t\t<div {...props}>\n\t\t\tHello World!\n\t\t</div>\n\t);\n}", "const arrayToHtmlList = (arr, listID) =>\n\t(el => (\n\t\t(el = document.querySelector('#' + listID)),\n\t\t(el.innerHTML += arr.map(item => `<li>${item}</li>`).join(''))\n\t))();", "subdivide(quadrant) {\n\tswitch (quadrant) {\n\t\tcase 'ne':\n\t\t\treturn new Rectangle(this.x + this.w / 4, this.y - this.h / 4, this.w / 2, this.h / 2);\n\t\tcase 'nw':\n\t\t\treturn new Rectangle(this.x - this.w / 4, this.y - this.h / 4, this.w / 2, this.h / 2);\n\t\tcase 'se':\n\t\t\treturn new Rectangle(this.x + this.w / 4, this.y + this.h / 4, this.w / 2, this.h / 2);\n\t\tcase 'sw':\n\t\treturn new Rectangle(this.x - this.w / 4, this.y + this.h / 4, this.w / 2, this.h / 2);\n\t}\n}", "canvas.parent('rgb-Canvas');\nlet colors = [];\nlet labels = [];\nfor (let record of data.entries) {\n\tlet col = [record.r / 255, record.g / 255, record.b / 255];\n\tcolors.push(col);\n\tlabels.push(labelList.indexOf(record.label));\n}", "$('button').click(function(){\n\t$.post('demo_test_post.asp',\n{\n\t\tname: 'Donald Duck',\n\t\tcity: 'Duckburg'\n\t},\n\tfunction(data, status){\n\t\talert('Data: ' + data + '\nStatus: ' + status);\n\t});\n});", "const points = [40, 100, 1, 5, 25, 10];\n\nfor (let i = points.length -1; i > 0; i--) {\n\tlet j = Math.floor(Math.random() * i)\n\tlet k = points[i]\n\tpoints[i] = points[j]\n\tpoints[j] = k\n}", "function quicksort(arr){\n\tvar pivot = arr[0];\n\n\tvar left = [];\n\tvar right = [];\n\n\tfor (var i = 1; i < arr.length; i++) {\n\t\tarr[i] < pivot ? left.push(arr[i]) : right.push(arr[i]);\n\t}\n\n\treturn quicksort(left).concat(pivot, quicksort(right));\n}", "const disableAnimations = () => {\n\tconst rule = `\n\t\t*,\n\t\t::before,\n\t\t::after {\n\t\t\tanimation: initial !important;\n\t\t\ttransition: initial !important;\n\t\t}\n\t`;\n\n\tconst style = document.createElement('style');\n\tdocument.body.append(style);\n\n\tstyle.sheet.insertRule(rule);\n};", "export async function fileTypeFromFile(path) {\n\tconst tokenizer = await strtok3.fromFile(path);\n\ttry {\n\t\treturn await fileTypeFromTokenizer(tokenizer);\n\t} finally {\n\t\tawait tokenizer.close();\n\t}\n}", "export class IpNotFoundError extends Error {\n\tconstructor(options) {\n\t\tsuper('Could not get the public IP address', options);\n\t\tthis.name = 'IpNotFoundError';\n\t}\n}", "function keysSorter(input) {\n\tif (Array.isArray(input)) {\n\t\treturn input.sort();\n\t}\n\n\tif (typeof input === 'object') {\n\t\treturn keysSorter(Object.keys(input))\n\t\t\t.sort((a, b) => Number(a) - Number(b))\n\t\t\t.map(key => input[key]);\n\t}\n\n\treturn input;\n}", "function getHash(url) {\n\tlet hash = '';\n\tconst hashStart = url.indexOf('#');\n\tif (hashStart !== -1) {\n\t\thash = url.slice(hashStart);\n\t}\n\n\treturn hash;\n}", "export default function isJpg(buffer) {\n\tif (!buffer || buffer.length < 3) {\n\t\treturn false;\n\t}\n\n\treturn buffer[0] === 255\n\t\t&& buffer[1] === 216\n\t\t&& buffer[2] === 255;\n}", "const UPPERCASE = /[p{Lu}]/u;\nconst LOWERCASE = /[p{Ll}]/u;\nconst LEADING_CAPITAL = /^[p{Lu}](?![p{Lu}])/gu;\nconst IDENTIFIER = /([p{Alpha}p{N}_]|$)/u;\nconst SEPARATORS = /[_.- ]+/;\n\nconst LEADING_SEPARATORS = new RegExp('^' + SEPARATORS.source);\nconst SEPARATORS_AND_IDENTIFIER = new RegExp(SEPARATORS.source + IDENTIFIER.source, 'gu');\nconst NUMBERS_AND_IDENTIFIER = new RegExp('\\d+' + IDENTIFIER.source, 'gu');", "navigator.serviceWorker.onmessage = function(event) {\n\tlet data = event.data.message\n\tlet text = JSON.stringify(JSON.parse(data), null, 2)\n\n\tdocument.getElementById(\"receivedNotifications\").innerHTML +=\n\t\"<pre><code>\" + text + \"</code></pre>\"\n}", "if (!req.query.url) {\n\tres.send(\"you should pass a url parameter\")\n}\nconst filename = \"./cache/\" + sanitize(req.query.url) + \"-\" +req.query.width + \"-\" + req.query.height\n\nconst thumbnailResizer = sharp()\n\t.resize(req.query.width ? parseInt(req.query.width) : null, req.query.height ? parseInt(req.query.height) : null)\n\t.rotate()\n\t.png();", "function delay(func, wait, ...args) {\n\tif (typeof func !== \"function\") {\n\t\tthrow new TypeError(\"Expected a function\");\n\t}\n\treturn setTimeout(func, +wait || 0, ...args);\n}", "function intersectionWith(...arrays) {\n\tlet comparator = last(arrays)\n\tconst mapped = map(arrays, castArrayLikeObject)\n\n\tcomparator = typeof comparator === \"function\" ? comparator : undefined\n\tif (comparator) {\n\t\tmapped.pop()\n\t}\n\treturn mapped.length && mapped[0] === arrays[0]\n\t\t? baseIntersection(mapped, undefined, comparator)\n\t\t: []\n}", "function invert(object) {\n\tconst result = {}\n\tObject.keys(object).forEach((key) => {\n\t\tlet value = object[key]\n\t\tif (value != null && typeof value.toString !== \"function\") {\n\t\t\tvalue = toString.call(value)\n\t\t}\n\t\tresult[value] = key\n\t})\n\treturn result\n}", "export default function memoize(func, hasher) {\n\tvar memoize = function (key) {\n\t\tvar cache = memoize.cache\n\t\tvar address = \"\" + (hasher ? hasher.apply(this, arguments) : key)\n\t\tif (!has(cache, address)) cache[address] = func.apply(this, arguments)\n\t\treturn cache[address]\n\t}\n\tmemoize.cache = {}\n\treturn memoize\n}", "export default function unzip(array) {\n\tvar length = array && max(array, getLength).length || 0;\n\tvar result = Array(length);\n\n\tfor (var index = 0; index < length; index++) {\n\t\tresult[index] = pluck(array, index);\n\t}\n\treturn result;\n}", "const fibSequence = [1]\n\nlet currentValue = 1\nlet previousValue = 0\n\nif (n === 1) {\n\treturn fibSequence\n}\n\nlet iterationsCounter = n - 1\n\nwhile (iterationsCounter) {\n\tcurrentValue += previousValue\n\tpreviousValue = currentValue - previousValue\n\n\tfibSequence.push(currentValue)\n\n\titerationsCounter -= 1\n}", "class BinarySearchTree {\n\tconstructor(nodeValueCompareFunction) {\n\t\tthis.root = new BinarySearchTreeNode(null, nodeValueCompareFunction)\n\t\tthis.nodeComparator = this.root.nodeComparator\n\t}\n\n\tinsert(value) {\n\t\treturn this.root.insert(value)\n\t}\n\n\tcontains(value) {\n\t\treturn this.root.contains(value)\n\t}\n\n\tremove(value) {\n\t\treturn this.root.remove(value)\n\t}\n\n\ttoString() {\n\t\treturn this.root.toString()\n\t}\n}", "const product = []\n\nfor (let indexA = 0; indexA < setA.length; indexA += 1) {\n\tfor (let indexB = 0; indexB < setB.length; indexB += 1) {\n\t\t// Add current product pair to the product set.\n\t\tproduct.push([setA[indexA], setB[indexB]])\n\t}\n}", "function fisherYates(originalArray) {\n\tconst array = originalArray.slice(0)\n\n\tfor (let i = array.length - 1; i > 0; i -= 1) {\n\t\tconst randomIndex = Math.floor(Math.random() * (i + 1));\n\t\t[array[i], array[randomIndex]] = [array[randomIndex], array[i]]\n\t}\n\n\treturn array\n}", "const getRandomNumber = (min, max) => Math.random() * (max - min) + min\ngetRandomNumber(2, 10)\n\nconst getRandomNumberInclusive = (min, max) => {\n\tmin = Math.ceil(min)\n\tmax = Math.floor(max)\n\treturn Math.floor(Math.random() * (max - min + 1)) + min\n}\ngetRandomNumberInclusive(2, 10)", "const span = document.querySelector(\"span\")\nlet classes = span.classList\n\nspan.addEventListener(\"click\", function () {\n\tlet result = classes.toggle(\"active\")\n\n\tif (result) {\n\t\tconsole.log(\"active class was added\")\n\t} else {\n\t\tconsole.log(\"active class was removed\")\n\t}\n})", "function cuid() {\n\tlet letter = \"c\" // hard-coded allows for sequential access\n\n\tlet timestamp = new Date().getTime().toString(base)\n\t// Prevent same-machine collisions.\n\tlet counter = pad(safeCounter().toString(base), blockSize)\n\tlet print = fingerprint()\n\tlet random = randomBlock() + randomBlock()\n\n\treturn letter + timestamp + counter + print + random\n}", "const [isEditing, setisEditing] = useState(false)\n\nconst handleNameClick = () => setisEditing(!isEditing)\n\nconst statuses = [\n\t{ name: \"accepted\", value: \"Accepted\" },\n\t{ name: \"rejected\", value: \"Rejected\" },\n\t{ name: \"unanswered\", value: \"Unanswered\" },\n]", "function createSalt(keyLength, callback) {\n\tcrypto.randomBytes(keyLength, function (err, buff) {\n\t\tif (err) {\n\t\t\treturn callback(err)\n\t\t}\n\t\tcallback(null, buff.toString(\"base64\"))\n\t})\n}", "export function quadratic(a, b, c) {\n\tif (nearlyEquals(a, 0) && nearlyEquals(b, 0)) return []\n\tif (nearlyEquals(a, 0)) return [-c / b]\n\n\tconst p = -b / 2 / a\n\tconst q = Math.sqrt(b * b - 4 * a * c) / 2 / a\n\treturn [p + q, p - q]\n}", "function binomial(n, k) {\n\tif (k < 0 || k > n) return 0\n\tif (k === 0) return 1\n\tif (2 * k > n) return binomial(n, n - k)\n\n\tlet coeff = 1\n\tfor (let i = 1; i <= k; ++i) coeff *= (n - i + 1) / i\n\treturn Math.round(coeff)\n}", "if (typeof c1 === \"number\") c1 = new Complex(c1, 0)\nif (typeof c2 === \"number\") c2 = new Complex(c2, 0)\n\nconst re = c1.re * c2.re - c1.im * c2.im\nconst im = c1.im * c2.re + c1.re * c2.im\nreturn new Complex(re, im)", "if (typeof c1 === \"number\") c1 = new Complex(c1, 0)\nif (typeof c2 === \"number\") c2 = new Complex(c2, 0)\n\nif (Math.abs(c2.re) < Number.EPSILON || Math.abs(c2.im) < Number.EPSILON) {\n\treturn new Complex(Infinity, Infinity)\n}\n\nconst denominator = c2.re * c2.re + c2.im * c2.im\nconst re = (c1.re * c2.re + c1.im * c2.im) / denominator\nconst im = (c1.im * c2.re - c1.re * c2.im) / denominator\n\nreturn new Complex(re, im)", "function rotation(angle) {\n\tconst sin = Math.sin(angle)\n\tconst cos = Math.cos(angle)\n\treturn [\n\t\t[cos, -sin],\n\t\t[sin, cos],\n\t]\n}", "const T = []\nfor (let j = 0; j < M[0].length; ++j) {\n\tconst row = []\n\tfor (let i = 0; i < M.length; ++i) {\n\t\trow.push(M[i][j])\n\t}\n\tT.push(row)\n}\nreturn T", "function poisson(l = 1) {\n\tif (l <= 0) return 0\n\tconst L = Math.exp(-l)\n\tlet p = 1\n\n\tlet k = 0\n\tfor (; p > L; ++k) p *= Math.random()\n\treturn k - 1\n}", "export function normalPDF(x: number, m = 1, v = 0) {\n\treturn Math.exp(-((x - m) ** 2) / (2 * v)) / Math.sqrt(2 * Math.PI * v)\n}", "if (z < 0.5) return Math.PI / (Math.sin(Math.PI * z) * gamma(1 - z))\n\nz -= 1\nlet x = P[0]\nfor (let i = 1; i < G + 2; i++) x += P[i] / (z + i)\nconst t = z + G + 0.5\n\nreturn Math.sqrt(2 * Math.PI) * Math.pow(t, z + 0.5) * Math.exp(-t) * x", "const date = toDate(dirtyDate)\nconst amount = toInteger(dirtyAmount)\nif (isNaN(amount)) {\n\treturn new Date(NaN)\n}\nif (!amount) {\n\t// If 0 days, no-op to avoid changing times in the hour before end of DST\n\treturn date\n}\ndate.setDate(date.getDate() + amount)\nreturn date", "function toLatLng (str) {\r\n\tvar match = /^\\s*?(-?[0-9]+\\.?[0-9]+?)\\s*,\\s*(-?[0-9]+\\.?[0-9]+?)\\s*$/.exec(str);\r\n\r\n\tif (match && match.length === 3) {\r\n\t\tvar lat = parseFloat(match[1]);\r\n\t\tvar lng = parseFloat(match[2]);\r\n\r\n\t\tif ((lat >= -90) && (lat <= 90) && (lng >= -180) && (lng <= 180)) {\r\n\t\t\treturn [lat, lng];\r\n\t\t}\r\n\t\telse {\r\n\t\t\treturn null;\r\n\t\t}\r\n\t}\r\n\treturn null;\r\n}", "/** @type {import('postcss-load-config').Config} */\nconst config = {\n\tparser: \"postcss-scss\",\n\tplugins: [require(\"autoprefixer\")],\n};\n\nmodule.exports = config;"];

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Testing in
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original
for (const quote of quotes) {

  if (matchedText.length === 0) return quote;

  const words = splitByAndKeep(quote, `.,"/#!$%^&*;:{}=-_\`~() `.split(""));

  const normalizedWords = words.map((word) => {
    const shouldHighlight =
      matchedText.find((match) => {
        return word.startsWith(match);
      }) !== undefined;
    return shouldHighlight ? `<span class="highlight">${word}</span>` : word;
  });

  return normalizedWords.join("");

}
ready
string.split(regex) with reduce
for (const quote of quotes) {
  
  if (matchedText.length === 0) return quote;

  // same delimiters as in search-service.ts:tokenize(text)
  const words = quote.split(/([\\\][.,"/#!?$%^&*;:{}=\-_`~()\s]+)/g);

  return words.reduce((highlightedText, currWord) => {
    const shouldHighlight =
      matchedText.find((match) => currWord.startsWith(match)) !== undefined;
    const highlightedWord = shouldHighlight
      ? `<span class="highlight">${currWord}</span>`
      : currWord;
    return highlightedText + highlightedWord;
  }, "");

}
ready
string.matchAll(regex)
for (const quote of quotes) {

  if (matchedText.length === 0) return quote;

  const patternPrefix = /[^\\\][.,"/#!?$%^&*;:{}=\-_`~()\s]/g;
  const patterSuffix = /[^\\\][.,"/#!?$%^&*;:{}=\-_`~()\s]*/g;
  const pattern = new RegExp(
    `(?<!${patternPrefix.source})((?:${matchedText.join(")|(?:")}))${
      patterSuffix.source
    }`,
    "gd"
  );

  const elemPrefix = `<span class="highlight">`;
  const elemSuffix = `</span>`;
  const offsetLength = elemPrefix.length + elemSuffix.length;

  let offset = 0;
  let highlightedText = quote;
  const matches = quote.matchAll(pattern);
  for (const match of matches) {
    const matchStart = match.index + offset;
    const matchEnd = (match?.indices?.[0]?.[1] ?? match.index + match[0].length) + offset
    highlightedText = highlightedText.slice(0, matchStart) + elemPrefix + match[0] + elemSuffix + highlightedText.slice(matchEnd);
    offset += offsetLength;
  }

  return highlightedText;

}
ready

Revisions

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