Why does console.log wrongly print an empty array?

Question

I use Firefox.

This code logs [].

var log = console.log;

function new_comb(aComb) {
    var res = [];
    log(aComb); // <- This is          


        

Answer 1

console.log shows live data, not a snapshot of the object at the time you run it.

Since you splice all the data out of the array, it is empty almost as soon as you log it.

Stringify or deep copy the array if you want to log a snapshot of it.