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Update sqaure_it.md

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2017-12-17 22:15:36 +05:30
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snippets/sqaure_it.md
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@ -3,6 +3,7 @@
Use mapObject to return a object from array passed as an argument which gets sqaured as math operation Use mapObject to return a object from array passed as an argument which gets sqaured as math operation
```js ```js
const mapObject = (arr, fn) => (a => (a = [arr, arr.map(fn)], a[0].reduce( (acc,val,ind) => (acc[val] = a[1][ind], acc), {}) )) ( )
const squareIt = arr => mapObject(arr, a => a*a) const squareIt = arr => mapObject(arr, a => a*a)
squareIt([1,2,3]) // { 1: 1, 2: 4, 3: 9 } squareIt([1,2,3]) // { 1: 1, 2: 4, 3: 9 }
``` ```