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* SEO component that queries for data with\n *  Gatsby's useStaticQuery React hook\n *\n * See: https://www.gatsbyjs.org/docs/use-static-query/\n */\n\nimport React from 'react'\nimport PropTypes from 'prop-types'\nimport Helmet from 'react-helmet'\nimport { useStaticQuery, graphql } from 'gatsby'\n\nfunction SEO({ description, lang, meta, title }) {\n  const { site } = useStaticQuery(\n    graphql`\n      query {\n        site {\n          siteMetadata {\n            title\n            description\n            author\n          }\n        }\n      }\n    `\n  )\n\n  const metaDescription = description || site.siteMetadata.description\n\n  return (\n    <Helmet\n      htmlAttributes={{\n        lang,\n      }}\n      title={title}\n      titleTemplate={`%s | ${site.siteMetadata.title}`}\n      meta={[\n        {\n          name: `description`,\n          content: metaDescription,\n        },\n        {\n          property: `og:title`,\n          content: title,\n        },\n        {\n          property: `og:description`,\n          content: metaDescription,\n        },\n        {\n          property: `og:type`,\n          content: `website`,\n        },\n        {\n          name: `twitter:card`,\n          content: `summary`,\n        },\n        {\n          name: `twitter:creator`,\n          content: site.siteMetadata.author,\n        },\n        {\n          name: `twitter:title`,\n          content: title,\n        },\n        {\n          name: `twitter:description`,\n          content: metaDescription,\n        },\n      ].concat(meta)}\n    />\n  )\n}\n\nSEO.defaultProps = {\n  lang: `en`,\n  meta: [],\n  description: ``,\n}\n\nSEO.propTypes = {\n  description: PropTypes.string,\n  lang: PropTypes.string,\n  meta: PropTypes.arrayOf(PropTypes.object),\n  title: PropTypes.string.isRequired,\n}\n\nexport default SEO\n","import React, { useEffect } from 'react'\n\nconst COMMENTS_ID = 'graphcomment'\n\nconst Comments = () => {\n  useEffect(() => {\n    window.gc_params = {\n      graphcomment_id: 'mjexplains',\n      fixed_header_height: 0,\n    }\n\n    const script = document.createElement('script')\n    script.src = 'https://graphcomment.com/js/integration.js?' + Date.now()\n    script.async = true\n\n    const comments = document.getElementById(COMMENTS_ID)\n    if (comments) comments.appendChild(script)\n\n    // This function will get called when the component unmounts\n    // To make sure we don't end up with multiple instances of the comments component\n    return () => {\n      const comments = document.getElementById(COMMENTS_ID)\n      if (comments) comments.innerHTML = ''\n    }\n  }, [])\n\n  return <div id={COMMENTS_ID} />\n}\n\nexport default Comments\n","import React from 'react'\nimport { Link, graphql } from 'gatsby'\nimport { kebabCase } from 'lodash'\nimport { GatsbyImage } from 'gatsby-plugin-image'\n\nimport DefaultLayout from '../components/layout'\nimport SEO from '../components/seo'\n\nimport 'katex/dist/katex.min.css'\nimport Comments from '../components/comments'\n\nclass BlogPostTemplate extends React.Component {\n  render() {\n    const post = this.props.data.markdownRemark\n\n    return (\n      <DefaultLayout>\n        <SEO title={post.frontmatter.title} description={post.excerpt} />\n        <div className=\"clearfix post-content-box\">\n          <article className=\"article-page\">\n            <div className=\"page-content\">\n              {post.frontmatter.img && (\n                <div className=\"page-cover-image\">\n                  <figure>\n                    <GatsbyImage\n                      image={\n                        post.frontmatter.img.childImageSharp.gatsbyImageData\n                      }\n                      className=\"page-image\"\n                      key={\n                        post.frontmatter.img.childImageSharp.gatsbyImageData.src\n                      }\n                      alt=\"\"\n                    />\n                  </figure>\n                </div>\n              )}\n              <div className=\"wrap-content\">\n                <header className=\"header-page\">\n                  <h1 className=\"page-title\">{post.frontmatter.title}</h1>\n                  <div className=\"page-date\">\n                    <span>{post.frontmatter.date}</span>\n                  </div>\n                </header>\n                <div dangerouslySetInnerHTML={{ __html: post.html }} />\n                <div className=\"page-footer\">\n                  <div className=\"page-tag\">\n                    {post.frontmatter.tags &&\n                      post.frontmatter.tags.map((tag) => (\n                        <span key={tag}>\n                          <Link className=\"tag\" to={`/tags/${kebabCase(tag)}/`}>\n                            # {tag}\n                          </Link>\n                        </span>\n                      ))}\n                  </div>\n                </div>\n              </div>\n            </div>\n          </article>\n          <Comments />\n        </div>\n      </DefaultLayout>\n    )\n  }\n}\n\nexport default BlogPostTemplate\n\nexport const pageQuery = graphql`\n  query BlogPostBySlug($slug: String!) {\n    site {\n      siteMetadata {\n        title\n        author\n      }\n    }\n    markdownRemark(fields: { slug: { eq: $slug } }) {\n      id\n      excerpt(pruneLength: 160)\n      html\n      frontmatter {\n        title\n        date(formatString: \"YYYY, MMM DD\")\n        tags\n        img {\n          childImageSharp {\n            gatsbyImageData(\n              placeholder: BLURRED\n              layout: FULL_WIDTH\n              formats: [AUTO, AVIF, WEBP]\n            )\n          }\n        }\n      }\n    }\n  }\n`\n","var root = require('./_root');\n\n/** Built-in value references. */\nvar Symbol = root.Symbol;\n\nmodule.exports = Symbol;\n","/**\n * A specialized version of `_.map` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the new mapped array.\n */\nfunction arrayMap(array, iteratee) {\n  var index = -1,\n      length = array == null ? 0 : array.length,\n      result = Array(length);\n\n  while (++index < length) {\n    result[index] = iteratee(array[index], index, array);\n  }\n  return result;\n}\n\nmodule.exports = arrayMap;\n","/**\n * A specialized version of `_.reduce` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @param {*} [accumulator] The initial value.\n * @param {boolean} [initAccum] Specify using the first element of `array` as\n *  the initial value.\n * @returns {*} Returns the accumulated value.\n */\nfunction arrayReduce(array, iteratee, accumulator, initAccum) {\n  var index = -1,\n      length = array == null ? 0 : array.length;\n\n  if (initAccum && length) {\n    accumulator = array[++index];\n  }\n  while (++index < length) {\n    accumulator = iteratee(accumulator, array[index], index, array);\n  }\n  return accumulator;\n}\n\nmodule.exports = arrayReduce;\n","/** Used to match words composed of alphanumeric characters. */\nvar reAsciiWord = /[^\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\x7f]+/g;\n\n/**\n * Splits an ASCII `string` into an array of its words.\n *\n * @private\n * @param {string} The string to inspect.\n * @returns {Array} Returns the words of `string`.\n */\nfunction asciiWords(string) {\n  return string.match(reAsciiWord) || [];\n}\n\nmodule.exports = asciiWords;\n","var Symbol = require('./_Symbol'),\n    getRawTag = require('./_getRawTag'),\n    objectToString = require('./_objectToString');\n\n/** `Object#toString` result references. */\nvar nullTag = '[object Null]',\n    undefinedTag = '[object Undefined]';\n\n/** Built-in value references. */\nvar symToStringTag = Symbol ? Symbol.toStringTag : undefined;\n\n/**\n * The base implementation of `getTag` without fallbacks for buggy environments.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\nfunction baseGetTag(value) {\n  if (value == null) {\n    return value === undefined ? undefinedTag : nullTag;\n  }\n  return (symToStringTag && symToStringTag in Object(value))\n    ? getRawTag(value)\n    : objectToString(value);\n}\n\nmodule.exports = baseGetTag;\n","/**\n * The base implementation of `_.propertyOf` without support for deep paths.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Function} Returns the new accessor function.\n */\nfunction basePropertyOf(object) {\n  return function(key) {\n    return object == null ? undefined : object[key];\n  };\n}\n\nmodule.exports = basePropertyOf;\n","var Symbol = require('./_Symbol'),\n    arrayMap = require('./_arrayMap'),\n    isArray = require('./isArray'),\n    isSymbol = require('./isSymbol');\n\n/** Used as references for various `Number` constants. */\nvar INFINITY = 1 / 0;\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n    symbolToString = symbolProto ? symbolProto.toString : undefined;\n\n/**\n * The base implementation of `_.toString` which doesn't convert nullish\n * values to empty strings.\n *\n * @private\n * @param {*} value The value to process.\n * @returns {string} Returns the string.\n */\nfunction baseToString(value) {\n  // Exit early for strings to avoid a performance hit in some environments.\n  if (typeof value == 'string') {\n    return value;\n  }\n  if (isArray(value)) {\n    // Recursively convert values (susceptible to call stack limits).\n    return arrayMap(value, baseToString) + '';\n  }\n  if (isSymbol(value)) {\n    return symbolToString ? symbolToString.call(value) : '';\n  }\n  var result = (value + '');\n  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;\n}\n\nmodule.exports = baseToString;\n","var arrayReduce = require('./_arrayReduce'),\n    deburr = require('./deburr'),\n    words = require('./words');\n\n/** Used to compose unicode capture groups. */\nvar rsApos = \"['\\u2019]\";\n\n/** Used to match apostrophes. */\nvar reApos = RegExp(rsApos, 'g');\n\n/**\n * Creates a function like `_.camelCase`.\n *\n * @private\n * @param {Function} callback The function to combine each word.\n * @returns {Function} Returns the new compounder function.\n */\nfunction createCompounder(callback) {\n  return function(string) {\n    return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');\n  };\n}\n\nmodule.exports = createCompounder;\n","var basePropertyOf = require('./_basePropertyOf');\n\n/** Used to map Latin Unicode letters to basic Latin letters. */\nvar deburredLetters = {\n  // Latin-1 Supplement block.\n  '\\xc0': 'A',  '\\xc1': 'A', '\\xc2': 'A', '\\xc3': 'A', '\\xc4': 'A', '\\xc5': 'A',\n  '\\xe0': 'a',  '\\xe1': 'a', '\\xe2': 'a', '\\xe3': 'a', '\\xe4': 'a', '\\xe5': 'a',\n  '\\xc7': 'C',  '\\xe7': 'c',\n  '\\xd0': 'D',  '\\xf0': 'd',\n  '\\xc8': 'E',  '\\xc9': 'E', '\\xca': 'E', '\\xcb': 'E',\n  '\\xe8': 'e',  '\\xe9': 'e', '\\xea': 'e', '\\xeb': 'e',\n  '\\xcc': 'I',  '\\xcd': 'I', '\\xce': 'I', '\\xcf': 'I',\n  '\\xec': 'i',  '\\xed': 'i', '\\xee': 'i', '\\xef': 'i',\n  '\\xd1': 'N',  '\\xf1': 'n',\n  '\\xd2': 'O',  '\\xd3': 'O', '\\xd4': 'O', '\\xd5': 'O', '\\xd6': 'O', '\\xd8': 'O',\n  '\\xf2': 'o',  '\\xf3': 'o', '\\xf4': 'o', '\\xf5': 'o', '\\xf6': 'o', '\\xf8': 'o',\n  '\\xd9': 'U',  '\\xda': 'U', '\\xdb': 'U', '\\xdc': 'U',\n  '\\xf9': 'u',  '\\xfa': 'u', '\\xfb': 'u', '\\xfc': 'u',\n  '\\xdd': 'Y',  '\\xfd': 'y', '\\xff': 'y',\n  '\\xc6': 'Ae', '\\xe6': 'ae',\n  '\\xde': 'Th', '\\xfe': 'th',\n  '\\xdf': 'ss',\n  // Latin Extended-A block.\n  '\\u0100': 'A',  '\\u0102': 'A', '\\u0104': 'A',\n  '\\u0101': 'a',  '\\u0103': 'a', '\\u0105': 'a',\n  '\\u0106': 'C',  '\\u0108': 'C', '\\u010a': 'C', '\\u010c': 'C',\n  '\\u0107': 'c',  '\\u0109': 'c', '\\u010b': 'c', '\\u010d': 'c',\n  '\\u010e': 'D',  '\\u0110': 'D', '\\u010f': 'd', '\\u0111': 'd',\n  '\\u0112': 'E',  '\\u0114': 'E', '\\u0116': 'E', '\\u0118': 'E', '\\u011a': 'E',\n  '\\u0113': 'e',  '\\u0115': 'e', '\\u0117': 'e', '\\u0119': 'e', '\\u011b': 'e',\n  '\\u011c': 'G',  '\\u011e': 'G', '\\u0120': 'G', '\\u0122': 'G',\n  '\\u011d': 'g',  '\\u011f': 'g', '\\u0121': 'g', '\\u0123': 'g',\n  '\\u0124': 'H',  '\\u0126': 'H', '\\u0125': 'h', '\\u0127': 'h',\n  '\\u0128': 'I',  '\\u012a': 'I', '\\u012c': 'I', '\\u012e': 'I', '\\u0130': 'I',\n  '\\u0129': 'i',  '\\u012b': 'i', '\\u012d': 'i', '\\u012f': 'i', '\\u0131': 'i',\n  '\\u0134': 'J',  '\\u0135': 'j',\n  '\\u0136': 'K',  '\\u0137': 'k', '\\u0138': 'k',\n  '\\u0139': 'L',  '\\u013b': 'L', '\\u013d': 'L', '\\u013f': 'L', '\\u0141': 'L',\n  '\\u013a': 'l',  '\\u013c': 'l', '\\u013e': 'l', '\\u0140': 'l', '\\u0142': 'l',\n  '\\u0143': 'N',  '\\u0145': 'N', '\\u0147': 'N', '\\u014a': 'N',\n  '\\u0144': 'n',  '\\u0146': 'n', '\\u0148': 'n', '\\u014b': 'n',\n  '\\u014c': 'O',  '\\u014e': 'O', '\\u0150': 'O',\n  '\\u014d': 'o',  '\\u014f': 'o', '\\u0151': 'o',\n  '\\u0154': 'R',  '\\u0156': 'R', '\\u0158': 'R',\n  '\\u0155': 'r',  '\\u0157': 'r', '\\u0159': 'r',\n  '\\u015a': 'S',  '\\u015c': 'S', '\\u015e': 'S', '\\u0160': 'S',\n  '\\u015b': 's',  '\\u015d': 's', '\\u015f': 's', '\\u0161': 's',\n  '\\u0162': 'T',  '\\u0164': 'T', '\\u0166': 'T',\n  '\\u0163': 't',  '\\u0165': 't', '\\u0167': 't',\n  '\\u0168': 'U',  '\\u016a': 'U', '\\u016c': 'U', '\\u016e': 'U', '\\u0170': 'U', '\\u0172': 'U',\n  '\\u0169': 'u',  '\\u016b': 'u', '\\u016d': 'u', '\\u016f': 'u', '\\u0171': 'u', '\\u0173': 'u',\n  '\\u0174': 'W',  '\\u0175': 'w',\n  '\\u0176': 'Y',  '\\u0177': 'y', '\\u0178': 'Y',\n  '\\u0179': 'Z',  '\\u017b': 'Z', '\\u017d': 'Z',\n  '\\u017a': 'z',  '\\u017c': 'z', '\\u017e': 'z',\n  '\\u0132': 'IJ', '\\u0133': 'ij',\n  '\\u0152': 'Oe', '\\u0153': 'oe',\n  '\\u0149': \"'n\", '\\u017f': 's'\n};\n\n/**\n * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A\n * letters to basic Latin letters.\n *\n * @private\n * @param {string} letter The matched letter to deburr.\n * @returns {string} Returns the deburred letter.\n */\nvar deburrLetter = basePropertyOf(deburredLetters);\n\nmodule.exports = deburrLetter;\n","/** Detect free variable `global` from Node.js. */\nvar freeGlobal = typeof global == 'object' && global && global.Object === Object && global;\n\nmodule.exports = freeGlobal;\n","var Symbol = require('./_Symbol');\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar nativeObjectToString = objectProto.toString;\n\n/** Built-in value references. */\nvar symToStringTag = Symbol ? Symbol.toStringTag : undefined;\n\n/**\n * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the raw `toStringTag`.\n */\nfunction getRawTag(value) {\n  var isOwn = hasOwnProperty.call(value, symToStringTag),\n      tag = value[symToStringTag];\n\n  try {\n    value[symToStringTag] = undefined;\n    var unmasked = true;\n  } catch (e) {}\n\n  var result = nativeObjectToString.call(value);\n  if (unmasked) {\n    if (isOwn) {\n      value[symToStringTag] = tag;\n    } else {\n      delete value[symToStringTag];\n    }\n  }\n  return result;\n}\n\nmodule.exports = getRawTag;\n","/** Used to detect strings that need a more robust regexp to match words. */\nvar reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;\n\n/**\n * Checks if `string` contains a word composed of Unicode symbols.\n *\n * @private\n * @param {string} string The string to inspect.\n * @returns {boolean} Returns `true` if a word is found, else `false`.\n */\nfunction hasUnicodeWord(string) {\n  return reHasUnicodeWord.test(string);\n}\n\nmodule.exports = hasUnicodeWord;\n","/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar nativeObjectToString = objectProto.toString;\n\n/**\n * Converts `value` to a string using `Object.prototype.toString`.\n *\n * @private\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n */\nfunction objectToString(value) {\n  return nativeObjectToString.call(value);\n}\n\nmodule.exports = objectToString;\n","var freeGlobal = require('./_freeGlobal');\n\n/** Detect free variable `self`. */\nvar freeSelf = typeof self == 'object' && self && self.Object === Object && self;\n\n/** Used as a reference to the global object. */\nvar root = freeGlobal || freeSelf || Function('return this')();\n\nmodule.exports = root;\n","/** Used to compose unicode character classes. */\nvar rsAstralRange = '\\\\ud800-\\\\udfff',\n    rsComboMarksRange = '\\\\u0300-\\\\u036f',\n    reComboHalfMarksRange = '\\\\ufe20-\\\\ufe2f',\n    rsComboSymbolsRange = '\\\\u20d0-\\\\u20ff',\n    rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,\n    rsDingbatRange = '\\\\u2700-\\\\u27bf',\n    rsLowerRange = 'a-z\\\\xdf-\\\\xf6\\\\xf8-\\\\xff',\n    rsMathOpRange = '\\\\xac\\\\xb1\\\\xd7\\\\xf7',\n    rsNonCharRange = '\\\\x00-\\\\x2f\\\\x3a-\\\\x40\\\\x5b-\\\\x60\\\\x7b-\\\\xbf',\n    rsPunctuationRange = '\\\\u2000-\\\\u206f',\n    rsSpaceRange = ' \\\\t\\\\x0b\\\\f\\\\xa0\\\\ufeff\\\\n\\\\r\\\\u2028\\\\u2029\\\\u1680\\\\u180e\\\\u2000\\\\u2001\\\\u2002\\\\u2003\\\\u2004\\\\u2005\\\\u2006\\\\u2007\\\\u2008\\\\u2009\\\\u200a\\\\u202f\\\\u205f\\\\u3000',\n    rsUpperRange = 'A-Z\\\\xc0-\\\\xd6\\\\xd8-\\\\xde',\n    rsVarRange = '\\\\ufe0e\\\\ufe0f',\n    rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;\n\n/** Used to compose unicode capture groups. */\nvar rsApos = \"['\\u2019]\",\n    rsBreak = '[' + rsBreakRange + ']',\n    rsCombo = '[' + rsComboRange + ']',\n    rsDigits = '\\\\d+',\n    rsDingbat = '[' + rsDingbatRange + ']',\n    rsLower = '[' + rsLowerRange + ']',\n    rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',\n    rsFitz = '\\\\ud83c[\\\\udffb-\\\\udfff]',\n    rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',\n    rsNonAstral = '[^' + rsAstralRange + ']',\n    rsRegional = '(?:\\\\ud83c[\\\\udde6-\\\\uddff]){2}',\n    rsSurrPair = '[\\\\ud800-\\\\udbff][\\\\udc00-\\\\udfff]',\n    rsUpper = '[' + rsUpperRange + ']',\n    rsZWJ = '\\\\u200d';\n\n/** Used to compose unicode regexes. */\nvar rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',\n    rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',\n    rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',\n    rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',\n    reOptMod = rsModifier + '?',\n    rsOptVar = '[' + rsVarRange + ']?',\n    rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',\n    rsOrdLower = '\\\\d*(?:1st|2nd|3rd|(?![123])\\\\dth)(?=\\\\b|[A-Z_])',\n    rsOrdUpper = '\\\\d*(?:1ST|2ND|3RD|(?![123])\\\\dTH)(?=\\\\b|[a-z_])',\n    rsSeq = rsOptVar + reOptMod + rsOptJoin,\n    rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq;\n\n/** Used to match complex or compound words. */\nvar reUnicodeWord = RegExp([\n  rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',\n  rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',\n  rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,\n  rsUpper + '+' + rsOptContrUpper,\n  rsOrdUpper,\n  rsOrdLower,\n  rsDigits,\n  rsEmoji\n].join('|'), 'g');\n\n/**\n * Splits a Unicode `string` into an array of its words.\n *\n * @private\n * @param {string} The string to inspect.\n * @returns {Array} Returns the words of `string`.\n */\nfunction unicodeWords(string) {\n  return string.match(reUnicodeWord) || [];\n}\n\nmodule.exports = unicodeWords;\n","var deburrLetter = require('./_deburrLetter'),\n    toString = require('./toString');\n\n/** Used to match Latin Unicode letters (excluding mathematical operators). */\nvar reLatin = /[\\xc0-\\xd6\\xd8-\\xf6\\xf8-\\xff\\u0100-\\u017f]/g;\n\n/** Used to compose unicode character classes. */\nvar rsComboMarksRange = '\\\\u0300-\\\\u036f',\n    reComboHalfMarksRange = '\\\\ufe20-\\\\ufe2f',\n    rsComboSymbolsRange = '\\\\u20d0-\\\\u20ff',\n    rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange;\n\n/** Used to compose unicode capture groups. */\nvar rsCombo = '[' + rsComboRange + ']';\n\n/**\n * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and\n * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).\n */\nvar reComboMark = RegExp(rsCombo, 'g');\n\n/**\n * Deburrs `string` by converting\n * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)\n * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)\n * letters to basic Latin letters and removing\n * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to deburr.\n * @returns {string} Returns the deburred string.\n * @example\n *\n * _.deburr('déjà vu');\n * // => 'deja vu'\n */\nfunction deburr(string) {\n  string = toString(string);\n  return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');\n}\n\nmodule.exports = deburr;\n","/**\n * Checks if `value` is classified as an `Array` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array, else `false`.\n * @example\n *\n * _.isArray([1, 2, 3]);\n * // => true\n *\n * _.isArray(document.body.children);\n * // => false\n *\n * _.isArray('abc');\n * // => false\n *\n * _.isArray(_.noop);\n * // => false\n */\nvar isArray = Array.isArray;\n\nmodule.exports = isArray;\n","/**\n * Checks if `value` is object-like. A value is object-like if it's not `null`\n * and has a `typeof` result of \"object\".\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n * @example\n *\n * _.isObjectLike({});\n * // => true\n *\n * _.isObjectLike([1, 2, 3]);\n * // => true\n *\n * _.isObjectLike(_.noop);\n * // => false\n *\n * _.isObjectLike(null);\n * // => false\n */\nfunction isObjectLike(value) {\n  return value != null && typeof value == 'object';\n}\n\nmodule.exports = isObjectLike;\n","var baseGetTag = require('./_baseGetTag'),\n    isObjectLike = require('./isObjectLike');\n\n/** `Object#toString` result references. */\nvar symbolTag = '[object Symbol]';\n\n/**\n * Checks if `value` is classified as a `Symbol` primitive or object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n * @example\n *\n * _.isSymbol(Symbol.iterator);\n * // => true\n *\n * _.isSymbol('abc');\n * // => false\n */\nfunction isSymbol(value) {\n  return typeof value == 'symbol' ||\n    (isObjectLike(value) && baseGetTag(value) == symbolTag);\n}\n\nmodule.exports = isSymbol;\n","var createCompounder = require('./_createCompounder');\n\n/**\n * Converts `string` to\n * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the kebab cased string.\n * @example\n *\n * _.kebabCase('Foo Bar');\n * // => 'foo-bar'\n *\n * _.kebabCase('fooBar');\n * // => 'foo-bar'\n *\n * _.kebabCase('__FOO_BAR__');\n * // => 'foo-bar'\n */\nvar kebabCase = createCompounder(function(result, word, index) {\n  return result + (index ? '-' : '') + word.toLowerCase();\n});\n\nmodule.exports = kebabCase;\n","var baseToString = require('./_baseToString');\n\n/**\n * Converts `value` to a string. An empty string is returned for `null`\n * and `undefined` values. The sign of `-0` is preserved.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n * @example\n *\n * _.toString(null);\n * // => ''\n *\n * _.toString(-0);\n * // => '-0'\n *\n * _.toString([1, 2, 3]);\n * // => '1,2,3'\n */\nfunction toString(value) {\n  return value == null ? '' : baseToString(value);\n}\n\nmodule.exports = toString;\n","var asciiWords = require('./_asciiWords'),\n    hasUnicodeWord = require('./_hasUnicodeWord'),\n    toString = require('./toString'),\n    unicodeWords = require('./_unicodeWords');\n\n/**\n * Splits `string` into an array of its words.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to inspect.\n * @param {RegExp|string} [pattern] The pattern to match words.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Array} Returns the words of `string`.\n * @example\n *\n * _.words('fred, barney, & pebbles');\n * // => ['fred', 'barney', 'pebbles']\n *\n * _.words('fred, barney, & pebbles', /[^, ]+/g);\n * // => ['fred', 'barney', '&', 'pebbles']\n */\nfunction words(string, pattern, guard) {\n  string = toString(string);\n  pattern = guard ? undefined : pattern;\n\n  if (pattern === undefined) {\n    return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);\n  }\n  return string.match(pattern) || [];\n}\n\nmodule.exports = words;\n"],"sourceRoot":""}