JezK
Edit File: abbrev.js
module.exports = exports = abbrev.abbrev = abbrev abbrev.monkeyPatch = monkeyPatch function monkeyPatch () { Object.defineProperty(Array.prototype, 'abbrev', { value: function () { return abbrev(this) }, enumerable: false, configurable: true, writable: true }) Object.defineProperty(Object.prototype, 'abbrev', { value: function () { return abbrev(Object.keys(this)) }, enumerable: false, configurable: true, writable: true }) } function abbrev (list) { if (arguments.length !== 1 || !Array.isArray(list)) { list = Array.prototype.slice.call(arguments, 0) } for (var i = 0, l = list.length, args = [] ; i < l ; i ++) { args[i] = typeof list[i] === "string" ? list[i] : String(list[i]) } // sort them lexicographically, so that they're next to their nearest kin args = args.sort(lexSort) // walk through each, seeing how much it has in common with the next and previous var abbrevs = {} , prev = "" for (var i = 0, l = args.length ; i < l ; i ++) { var current = args[i] , next = args[i + 1] || "" , nextMatches = true , prevMatches = true if (current === next) continue for (var j = 0, cl = current.length ; j < cl ; j ++) { var curChar = current.charAt(j) nextMatches = nextMatches && curChar === next.charAt(j) prevMatches = prevMatches && curChar === prev.charAt(j) if (!nextMatches && !prevMatches) { j ++ break } } prev = current if (j === cl) { abbrevs[current] = current continue } for (var a = current.substr(0, j) ; j <= cl ; j ++) { abbrevs[a] = current a += current.charAt(j) } } return abbrevs } function lexSort (a, b) { return a === b ? 0 : a > b ? 1 : -1 }