object.key play

by james gotsell

HTML

<script src=" https://getfirebug.com/firebug-lite-debug.js"></script>

JavaScript

var arr = ['a', 'b', '1'];
console.log(Object.keys(arr)); // console: ['0', '1', '2']

// array like object
var obj = { 0: 'a', 1: 'b', b: 'c' };
console.log(Object.keys(obj)); // console: ['0', '1', '2']

// array like object with random key ordering
var an_obj = { 100: 'a', 2: 'b', 7: 'c' };
console.log(Object.keys(an_obj)); // console: ['2', '7', '100']

// getFoo is property which isn't enumerable
var my_obj = Object.create({}, { getFoo: { value: function() { return this.foo; } } });
my_obj.bob = 1;
my_obj["foo"] =2; 

console.log(Object.keys(my_obj)); // console: ['foo']
console.log(my_obj)

/// it seem that object.key returns the keys when applied to objects and index number when applied to arrays