Question

6

rated 0 times [ 11] [ 5] / answers: 1 / hits: 33916 / 13 Years ago, sat, june 18, 2011, 12:00:00

In javascript is there a difference between using

if (foo.length > 0) {

//run code involving foo

}

and

if (foo) {

//run code involving foo

}

If so, could someone please explain the difference and an example where they would not be the same?

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2 Years ago

answered 13 Years ago kirstendevanb · Accepted Answer

Here's an example where they are not the same:

var x = [];

alert(x? 'yes' : 'no'); // displays yes

alert((x.length > 0)? 'yes' : 'no'); // displays no