I am using javascript associative array like:
var testarray = [];
testarray['one'] = '1';
testarray['two'] = '2';
testarray['three'] = '3';
I am also using jquery alongside. How can I check length of this associative array using jquery or any other method? Basically i want to check whether this array is empty or not.
Thank you.
This gives you the length of your associative array:
Object.keys(testarray).length
You can loop through the properties to count them:
var cnt = 0;
for (i in testarray) cnt++;
alert(cnt);
Note that the for (... in ...) will also loop items added by a prototype, so you might want to count only the items added after that:
var cnt = 0;
for (i in testarray) if (testarray.hasOwnProperty(i)) cnt++;
alert(cnt);
If you just want to check if there are any properties, you can exit out of the loop after the first item:
var empty = true;
for (i in testarray) if (testarray.hasOwnProperty(i)) { empty = false; break; }
alert(empty);