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var _ = require('lodash'); | |
var concat = function (arr) { | |
var args = arguments, | |
len = args.length, | |
ArrayTypeOf = "[object Array]", | |
toString = Object.prototype.toString, | |
push = Array.prototype.push; | |
for (var i = 1; i < len; i++) { | |
if (toString.call(args[i]) === ArrayTypeOf) { | |
push.apply(arr, args[i]); | |
} else { | |
arr.push(args[i]); | |
} | |
} | |
return arr; | |
}; | |
Array.prototype.concat = function(arr) { | |
return concat(this, arr); | |
} | |
function stupidFln(arr) { | |
let result = []; | |
_.forEach(arr, (a) => result = result.concat(_.isArray(a) ? stupidFln(a) : a)); | |
return result; | |
} | |
Array.prototype.stupidFln = function() { | |
return stupidFln(this); | |
} | |
const oneLinerFln = (arr) => arr.reduce((a, b) => a.concat(Array.isArray(b) ? oneLinerFln(b) : b), []) | |
Array.prototype.oneLinerFln = function() { | |
return oneLinerFln(this); | |
} | |
const A = [[1,2,[[3,[4]]],5]]; | |
const expected = [1,2,3,4,5]; | |
console.assert(_.isEqual(expected, A.stupidFln()) && _.isEqual(expected, A.oneLinerFln()), "DON'T TOUCH TESTS, FIX YOUR CODE"); |
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