Check if array key exists via the in operator

[d.healey]

The in operator doesn't seem to be acting like I would expect. In this snippet of code it should be printing 0 but it always prints 1.

var myObj = {pie:"apple", cake:"chocolate", sausage:"dog"};

if ("fish" in myObj)
{
	Console.print(1);
}
else 
{
	Console.print(0);
}

[Christoph Hart]

Yeah, the in operator is only used for the iterator loop.

But you can test if the key exists like this:

var myObj = {"pie":"apple", "cake":"chocolate", "sausage":"dog"};

inline function keyExists(obj, key)
{
	return !(obj[key] == void); // Important: not undefined!
}

if (keyExists(myObj, "fish"))
{
	Console.print(1);
}
else 
{
	Console.print(0);
}

[d.healey]

Thank you :)