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First solution in Clear category for [old] Flatten a List by Sim0000
"use strict";
function flatList(a){
let r = [];
for(let d of a){
r = r.concat(d.length != null ? flatList(d) : [d]);
}
return r;
}
var assert = require('assert');
if (!global.is_checking) {
assert.deepEqual(flatList([1, 2, 3]), [1, 2, 3], "First");
assert.deepEqual(flatList([1, [2, 2, 2], 4]), [1, 2, 2, 2, 4], "Second");
assert.deepEqual(flatList([[[2]], [4, [5, 6, [6], 6, 6, 6], 7]]), [2, 4, 5, 6, 6, 6, 6, 6, 7], "Third");
assert.deepEqual(flatList([-1, [1, [-2], 1], -1]), [-1, 1, -2, 1, -1], "Four");
console.log("Coding complete? Click 'Check' to review your tests and earn cool rewards!");
}
March 17, 2017
