foop/dist/deps/cast/unicodeToArray.js

interfaces that describe their intentions.

// -----

/** Used to compose unicode character classes. */
var rsAstralRange = '\\ud800-\\udfff'
var rsComboMarksRange = '\\u0300-\\u036f'
var reComboHalfMarksRange = '\\ufe20-\\ufe2f'
var rsComboSymbolsRange = '\\u20d0-\\u20ff'
var rsVarRange = '\\ufe0e\\ufe0f'
var rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange

/** Used to compose unicode capture groups. */
var rsAstral = "[" + rsAstralRange + "]"
var rsCombo = "[" + rsComboRange + "]"
var rsFitz = '\\ud83c[\\udffb-\\udfff]'
var rsModifier = "(?:" + rsCombo + "|" + rsFitz + ")"
var rsNonAstral = "[^" + rsAstralRange + "]"
var rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}'
var rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]'
var rsZWJ = '\\u200d'

/** Used to compose unicode regexes. */
var reOptMod = rsModifier + "?"
var rsOptVar = "[" + rsVarRange + "]?"
var rsOptJoin = "(?:" + rsZWJ + "(?:" + ([rsNonAstral, rsRegional, rsSurrPair].join('|')) + ")" + (rsOptVar + reOptMod) + ")*"
var rsSeq = rsOptVar + reOptMod + rsOptJoin
var rsNonAstralCombo = "" + rsNonAstral + rsCombo + "?"
var rsSymbol = "(?:" + ([rsNonAstralCombo, rsCombo, rsRegional, rsSurrPair, rsAstral].join('|')) + ")"

/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
var reUnicode = RegExp((rsFitz + "(?=" + rsFitz + ")|" + (rsSymbol + rsSeq)), 'g')

/**
 * Converts a Unicode `string` to an array.
 * @since 5.0.0-beta.5
 * @memberOf cast
 *
 * @param {string} string The string to convert.
 * @return {Array} Returns the converted array.
 *
 * @TODO @example
 *
 */
module.exports = function unicodeToArray(string) {
  return string.match(reUnicode) || []
}

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