javascript pass by reference workaround

Question

let\'s say I\'ve got an array, var animals = [\"dog\",\"cat\",\"rat\"];

then I define var pets = animals;

then I call pets.shift(

Answer 1

You have to clone the array, which is done with

var savedAnimals = animals.slice();

Note that this isn't a deep clone : it doesn't protect the elements inside against modification (if they're not strings).