Bug Tracker

Opened 14 years ago

Closed 12 years ago

Last modified 11 years ago

#3330 closed feature (fixed)

jQuery.typeof and jQuery.isEmpty Utilities

Reported by: projectatomic Owned by:
Priority: major Milestone: 1.4.3
Component: core Version: 1.4.2
Keywords: Cc:
Blocked by: Blocking:


One of the best aspects of jQuery is its light weight. I have really taken advantage of some of its built in Utilities such as jQuery.extend() and jQuery.map(). I am definitely against bloated software, but I find myself writing these functions time and again. They are pretty utilitarian and not too huge. Just a suggestion (code borrowed from Crockford's Remedial JavaScript)

  1. A better typeof function that actually returns 'array' for an array instead of 'object':

function typeOf(value) {

var s = typeof value; if (s === 'object') {

if (value) {

if (typeof value.length === 'number' &&

!(value.propertyIsEnumerable('length')) && typeof value.splice === 'function') {

s = 'array';


} else {

s = 'null';


} return s;


  1. A simple isEmpty function that returns a boolean:

function isEmpty(o) {

var i, v; if (typeOf(o) === 'object') {

for (i in o) {

v = o[i]; if (v !== undefined && typeOf(v) !== 'function') {

return false;



} return true;


Change History (2)

comment:1 Changed 13 years ago by mofle

Anyone have a patch for this?

comment:2 Changed 12 years ago by john

Resolution: fixed
Status: newclosed
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