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