index.js•1.3 kB
/*
* @version 1.4.0
* @date 2015-10-26
* @stability 3 - Stable
* @author Lauri Rooden (https://github.com/litejs/natural-compare-lite)
* @license MIT License
*/
var naturalCompare = function(a, b) {
var i, codeA
, codeB = 1
, posA = 0
, posB = 0
, alphabet = String.alphabet
function getCode(str, pos, code) {
if (code) {
for (i = pos; code = getCode(str, i), code < 76 && code > 65;) ++i;
return +str.slice(pos - 1, i)
}
code = alphabet && alphabet.indexOf(str.charAt(pos))
return code > -1 ? code + 76 : ((code = str.charCodeAt(pos) || 0), code < 45 || code > 127) ? code
: code < 46 ? 65 // -
: code < 48 ? code - 1
: code < 58 ? code + 18 // 0-9
: code < 65 ? code - 11
: code < 91 ? code + 11 // A-Z
: code < 97 ? code - 37
: code < 123 ? code + 5 // a-z
: code - 63
}
if ((a+="") != (b+="")) for (;codeB;) {
codeA = getCode(a, posA++)
codeB = getCode(b, posB++)
if (codeA < 76 && codeB < 76 && codeA > 66 && codeB > 66) {
codeA = getCode(a, posA, posA)
codeB = getCode(b, posB, posA = i)
posB = i
}
if (codeA != codeB) return (codeA < codeB) ? -1 : 1
}
return 0
}
try {
module.exports = naturalCompare;
} catch (e) {
String.naturalCompare = naturalCompare;
}