Created
August 17, 2012 11:05
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Array.map() that works with undefined values in Array
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| Array.prototype.ownMap = function(fn) { var a = new Array(this.length); for (var i = 0; i < this.length; i++) a[i] = fn(this[i]); return a; } | |
| // t = new Array(4) | |
| // > [undefined × 4] | |
| // t.ownMap(function(d) { return "Q"; }) | |
| // > ["Q", "Q", "Q", "Q"] | |
| // t | |
| // > [undefined × 4] |
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