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my map polypill
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| const nums = [17, 1, 2, 3, -1] | |
| const obj = (x) => { | |
| return {initial: x, square: x*x, positive: Math.sign(x) > 0 ? true : false} | |
| } | |
| Array.prototype.myMap = function(cb){ | |
| const output = [] | |
| for(let i = 0; i<this.length; i++){ | |
| output.push(cb(this[i])) | |
| } | |
| return output | |
| } | |
| console.log(nums.myMap(obj)) |
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