How to empty an array

empty-an-array.js

var foo = [1, 2, 3];
var bar = [1, 2, 3];
var foo2 = foo;
var bar2 = bar;

// assigns a reference to a new array to a variable, while any other references are unaffected
foo = [];

// deletes everything in the array, which does hit other references
bar.length = 0;

console.log(foo, bar, foo2, bar2);
// [] [] [1, 2, 3] []