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December 20, 2015 16:49
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Compare two software versions (like 1.3 or 2.10.1434 etc) with an operator (<, >, >=, <=, ==, !=)
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| function compareVersions(left, operator, right) { | |
| var i, il, bigger; | |
| left = left.split('.'); | |
| right = right.split('.'); | |
| if('==' == operator && left.length == right.length) { | |
| return left == right; | |
| } | |
| if('!=' == operator && left.length == right.length) { | |
| return left != right; | |
| } | |
| for(i = 0, il = left.length; i < il; i++) { | |
| if(right.length == i) { | |
| bigger = 'left'; | |
| break; | |
| } | |
| if(parseInt(left[i], 10) > parseInt(right[i], 10)) { | |
| bigger = 'left'; | |
| break; | |
| } | |
| if(parseInt(right[i], 10) > parseInt(left[i], 10)) { | |
| bigger = 'right'; | |
| break; | |
| } | |
| } | |
| if(left.length != right.length) { | |
| bigger = 'right'; | |
| } | |
| if('==' == operator) { | |
| return !bigger; | |
| } | |
| if('!=' == operator) { | |
| return !!bigger; | |
| } | |
| if(('<=' == operator || '>=' == operator) && !bigger) { | |
| return true; | |
| } | |
| if('>' == operator) { | |
| return 'left' == bigger; | |
| } | |
| if('<' == operator) { | |
| return 'right' == bigger; | |
| } | |
| } |
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