- for in
- hasOwnProperty
for-in loop on JavaScript object
examples/objects/for_in_loop_on_object.js
"use strict"; var email = { "from" : "js@bar.com", "to" : [ "foo@bar.com", "qux@bar.com" ], "subject" : "Hello World", "mime-type" : "text" }; console.log(email); var k; for (k in email) { if (! email.hasOwnProperty(k)) { continue; } console.log('k:', k); console.log('v:', email[k]); }