Jun 26
== Option One ==
function isEmpty(ob){ for(var i in ob){ return false;} return true; } isEmpty({a:1}) // false isEmpty({}) // true |
== Option Two ==
function isEmpty(o) { var o = {}; for(var p in o) { if (o[p] != o.constructor.prototype[p]) return false; } return true; } |
== Option Three ==
function isEmpty(ob){ for(var i in ob){ if(ob.hasOwnProperty(i)){return false;}} return true; } |
== Option Four ==
what about this?
var obj={} Object.prototype.isEmpty = function() { for (var prop in this) { if (this.hasOwnProperty(prop)) return false; } return true; }; alert(obj.isEmpty()) |
== Option five – Jquery ==
jQuery.isEmptyObject({}) // true jQuery.isEmptyObject({ foo: "bar" }) // false |
== References ==
* http://www.webdeveloper.com/forum/showthread.php?t=193474
* http://stackoverflow.com/questions/679915/how-do-i-test-for-an-empty-javascript-object-from-json
Similar question here about null object in javascript
* Check javascript object empty or null
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