jQuery delete a given key from array

When I have an array like this:

1. var test = Array();
2. test['key1'] = 'value1';
3. test['key2'] = 'value2';

I believe the delete operator in JavaScript will solve this:

1. var test = new Array();
2. test['key1'] = 'value1';
3. test['key2'] = 'value2';
4. delete test['key1']; // will remove key1 from the array