I recently ran across a scenario where a function of mine was returning an Object (also known as a hash in other languages such as Ruby), and I wanted to check in the caller whether the returned Object was empty or not. I did not care what the contents were, just needed special handling for the empty case.
If you are already using jQuery, then this is a handy function that was added in 1.4 that I was unaware of! isEmptyObject
It takes a single parameter, which is your Object, and returns true or false. It even takes into account "inherited" properties through the prototype object.
If you are already using jQuery, then this is a handy function that was added in 1.4 that I was unaware of! isEmptyObject
var myHash = { };
jQuery.isEmptyObject( myHash ); // true
myHash['foo'] = 'bar';
jQuery.isEmptyObject( myHash ); // falseIt takes a single parameter, which is your Object, and returns true or false. It even takes into account "inherited" properties through the prototype object.