JavaScript array slice versus delete

Question

Is there any reason why one should be used over the other?

e.g.

var arData=[\'a\',\'b\',\'c\'];
arData.slice(1,1);//removes \'b\'

var arData=[\'a\',         


        

Answer 1

delete only makes that certain location of the array undefined but the array still contains 3 items: ['a',undefined,'c']

the other way to do it is splice and not slice. splice totally removes that item and it's location, so you end up with ['a','c']