Question

This works:

var y=["Banana", "Orange", "Apple", "Mango"];
y.splice(0,1);
document.write(y);

It gives (predictably): Orange,Apple,Mango

This is also OK:

var z={};
z[32]="Help";
z[14]="Go";

But this doesn’t work:

z.splice(32,1);

The error message in Firebug is:

Error: z.splice is not a function …

There’s clearly a rule I don’t know about. What is it, and how does one splice out something like z[32]?

Thanks.

Answer 1

y is an array and z is an object.

You can’t use a function in the array prototype in an object.

var z=[];
z[32]="Help";
z[14]="Go";

z.splice(32,1);

Will work fine.