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JavaScript version compare
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| /** | |
| * Simply compares two string version values. | |
| * | |
| * Example: | |
| * versionCompare('1.1', '1.2') => -1 | |
| * versionCompare('1.1', '1.1') => 0 | |
| * versionCompare('1.2', '1.1') => 1 | |
| * versionCompare('2.23.3', '2.22.3') => 1 | |
| * | |
| * Returns: | |
| * -1 = left is LOWER than right | |
| * 0 = they are equal | |
| * 1 = left is GREATER = right is LOWER | |
| * And FALSE if one of input versions are not valid | |
| * | |
| * @function | |
| * @param {String} left Version #1 | |
| * @param {String} right Version #2 | |
| * @return {Integer|Boolean} | |
| * @author Alexey Bass (albass) | |
| * @since 2011-07-14 | |
| */ | |
| versionCompare = function(left, right) { | |
| if (typeof left + typeof right != 'stringstring') | |
| return false; | |
| var a = left.split('.') | |
| , b = right.split('.') | |
| , i = 0, len = Math.max(a.length, b.length); | |
| for (; i < len; i++) { | |
| if ((a[i] && !b[i] && parseInt(a[i]) > 0) || (parseInt(a[i]) > parseInt(b[i]))) { | |
| return 1; | |
| } else if ((b[i] && !a[i] && parseInt(b[i]) > 0) || (parseInt(a[i]) < parseInt(b[i]))) { | |
| return -1; | |
| } | |
| } | |
| return 0; | |
| } |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <title>QUnit Test Suite</title> | |
| <link rel="stylesheet" href="qunit/qunit.css"> | |
| <script src="qunit/qunit.js"></script> | |
| <script src="compare.js"></script> | |
| <script src="tests.qunit.js"></script> | |
| </head> | |
| <body> | |
| <div id="qunit"></div> | |
| <div id="qunit-fixture">test markup</div> | |
| </body> | |
| </html> |
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| test('invalid input', function() { | |
| equal(versionCompare(1, '2'), false); | |
| equal(versionCompare('2', 1), false); | |
| equal(versionCompare(3, 3), false); | |
| equal(versionCompare(true, false), false); | |
| equal(versionCompare(window, document), false); | |
| }); | |
| test('one digit', function() { | |
| equal(versionCompare('1', '2'), -1); | |
| equal(versionCompare('2', '1'), 1); | |
| equal(versionCompare('3', '3'), 0); | |
| }); | |
| test('many sections', function() { | |
| equal(versionCompare('2.22', '2.22'), 0); | |
| equal(versionCompare('2.23', '2.22'), 1); | |
| equal(versionCompare('2.22', '2.23'), -1); | |
| equal(versionCompare('2.22.0', '2.22.0'), 0); | |
| equal(versionCompare('2.22.1', '2.22.0'), 1); | |
| equal(versionCompare('2.22.1', '2.23.1'), -1); | |
| }); | |
| test('not equal sections', function() { | |
| equal(versionCompare('2', '2.0'), 0); | |
| equal(versionCompare('2', '2.1'), -1); | |
| equal(versionCompare('2.1', '2'), 1); | |
| }); | |
| test('LarryKim comment 120330', function() { | |
| equal(versionCompare('5', '3000'), -1); | |
| equal(versionCompare('3000', '5'), 1); | |
| }); |
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