Created
June 17, 2014 14:51
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/* | |
* Natural Sort algorithm for Javascript - Version 0.6 - Released under MIT license | |
* Author: Jim Palmer (based on chunking idea from Dave Koelle) | |
* Contributors: Mike Grier (mgrier.com), Clint Priest, Kyle Adams, guillermo | |
*/ | |
function naturalSort(a, b) { | |
var re = /(^-?[0-9]+(\.?[0-9]*)[df]?e?[0-9]?$|^0x[0-9a-f]+$|[0-9]+)/gi, | |
sre = /(^[ ]*|[ ]*$)/g, | |
dre = /(^([\w ]+,?[\w ]+)?[\w ]+,?[\w ]+\d+:\d+(:\d+)?[\w ]?|^\d{1,4}[\/\-]\d{1,4}[\/\-]\d{1,4}|^\w+, \w+ \d+, \d{4})/, | |
hre = /^0x[0-9a-f]+$/i, | |
ore = /^0/, | |
// convert all to strings and trim() | |
x = a.toString().replace(sre, '') || '', | |
y = b.toString().replace(sre, '') || '', | |
// chunk/tokenize | |
xN = x.replace(re, '\0$1\0').replace(/\0$/, '').replace(/^\0/, '').split('\0'), | |
yN = y.replace(re, '\0$1\0').replace(/\0$/, '').replace(/^\0/, '').split('\0'), | |
// numeric, hex or date detection | |
xD = parseInt(x.match(hre)) || (xN.length != 1 && x.match(dre) && Date.parse(x)), | |
yD = parseInt(y.match(hre)) || xD && y.match(dre) && Date.parse(y) || null; | |
// first try and sort Hex codes or Dates | |
if (yD) if (xD < yD) return -1; | |
else if (xD > yD) return 1; | |
// natural sorting through split numeric strings and default strings | |
for (var cLoc = 0, numS = Math.max(xN.length, yN.length); cLoc < numS; cLoc++) { | |
// find floats not starting with '0', string or 0 if not defined (Clint Priest) | |
oFxNcL = !(xN[cLoc] || '').match(ore) && parseFloat(xN[cLoc]) || xN[cLoc] || 0; | |
oFyNcL = !(yN[cLoc] || '').match(ore) && parseFloat(yN[cLoc]) || yN[cLoc] || 0; | |
// handle numeric vs string comparison - number < string - (Kyle Adams) | |
if (isNaN(oFxNcL) !== isNaN(oFyNcL)) return (isNaN(oFxNcL)) ? 1 : -1; | |
// rely on string comparison if different types - i.e. '02' < 2 != '02' < '2' | |
else if (typeof oFxNcL !== typeof oFyNcL) { | |
oFxNcL += ''; | |
oFyNcL += ''; | |
} | |
if (oFxNcL < oFyNcL) return -1; | |
if (oFxNcL > oFyNcL) return 1; | |
} | |
return 0; | |
} |
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