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86 lines
3.4 KiB
86 lines
3.4 KiB
var toString = require('./toString');
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/** Used to compose unicode character classes. */
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var rsAstralRange = '\\ud800-\\udfff',
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rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
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rsComboSymbolsRange = '\\u20d0-\\u20f0',
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rsDingbatRange = '\\u2700-\\u27bf',
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rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
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rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
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rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
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rsQuoteRange = '\\u2018\\u2019\\u201c\\u201d',
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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',
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rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
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rsVarRange = '\\ufe0e\\ufe0f',
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rsBreakRange = rsMathOpRange + rsNonCharRange + rsQuoteRange + rsSpaceRange;
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/** Used to compose unicode capture groups. */
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var rsBreak = '[' + rsBreakRange + ']',
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rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
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rsDigits = '\\d+',
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rsDingbat = '[' + rsDingbatRange + ']',
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rsLower = '[' + rsLowerRange + ']',
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rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
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rsFitz = '\\ud83c[\\udffb-\\udfff]',
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rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
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rsNonAstral = '[^' + rsAstralRange + ']',
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rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
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rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
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rsUpper = '[' + rsUpperRange + ']',
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rsZWJ = '\\u200d';
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/** Used to compose unicode regexes. */
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var rsLowerMisc = '(?:' + rsLower + '|' + rsMisc + ')',
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rsUpperMisc = '(?:' + rsUpper + '|' + rsMisc + ')',
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reOptMod = rsModifier + '?',
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rsOptVar = '[' + rsVarRange + ']?',
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rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
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rsSeq = rsOptVar + reOptMod + rsOptJoin,
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rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq;
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/** Used to match non-compound words composed of alphanumeric characters. */
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var reBasicWord = /[a-zA-Z0-9]+/g;
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/** Used to match complex or compound words. */
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var reComplexWord = RegExp([
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rsUpper + '?' + rsLower + '+(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
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rsUpperMisc + '+(?=' + [rsBreak, rsUpper + rsLowerMisc, '$'].join('|') + ')',
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rsUpper + '?' + rsLowerMisc + '+',
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rsUpper + '+',
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rsDigits,
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rsEmoji
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].join('|'), 'g');
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/** Used to detect strings that need a more robust regexp to match words. */
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var reHasComplexWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
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/**
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* Splits `string` into an array of its words.
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*
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* @static
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* @memberOf _
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* @since 3.0.0
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* @category String
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* @param {string} [string=''] The string to inspect.
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* @param {RegExp|string} [pattern] The pattern to match words.
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* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
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* @returns {Array} Returns the words of `string`.
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* @example
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*
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* _.words('fred, barney, & pebbles');
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* // => ['fred', 'barney', 'pebbles']
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*
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* _.words('fred, barney, & pebbles', /[^, ]+/g);
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* // => ['fred', 'barney', '&', 'pebbles']
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*/
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function words(string, pattern, guard) {
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string = toString(string);
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pattern = guard ? undefined : pattern;
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if (pattern === undefined) {
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pattern = reHasComplexWord.test(string) ? reComplexWord : reBasicWord;
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}
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return string.match(pattern) || [];
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}
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module.exports = words;
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