d_lambda.md

d_lambda.inc

Pawn Lambda - Provides short functions whose can be used in expressions. Or in other words lambda functions.

How to start to use?

• The most common example is just calling the function:

lambda using

new
	Lambda:Func = {
		return print("My Func works!");
	}

main()
{
	lambda using = {"Func"};
}

• Where lambda using is a lambda function, and Lambda:Func is a lambda procedure. lambda using will just call a lambda procedure once. Output:

My Func works!

lambda for

• lambda for will call the procedure several times.

new Lambda:TestLambda = {
    print("Lambda test passed!");
    return 1;
}

main()
{
    print("sussylambda : %i", lambda for = {"TestLambda", 10});
}

This way you'll use print("Lambda test passed!") ten times as a function argument. So the code above is equivalent to the code below:

TestLambda()
{
	for(new i; i < 10; i++)
	{
		print("Lambda test passed");
	}
	return 1;
}

main()
{
    print("sussylambda : %i", TestLambda());
}

• Output:

Lambda test passed!
Lambda test passed!
Lambda test passed!
Lambda test passed!
Lambda test passed!
Lambda test passed!
Lambda test passed!
Lambda test passed!
Lambda test passed!
Lambda test passed!

lambda while

• lambda while will call the procedure while a certain condition or expression is true.

new 
    bool:MyCondition = true, 
    Lambda:TestLambda2 = {
        MyCondition = false;
        print("TestLambda2 called!");
        return 1;
    }

main()
{
    lambda while = {"TestLambda2", MyCondition};
}

• Output:

TestLambda2 called!

lambda task

new
    Lambda:Timer = {
        return print("Lambda Timer works.");
    }

main()
{
    lambda task = {"Timer", 1000, true};
}

• This will create a repeating task (timer) which will get called every 1 second. To kill this timer, use KillTimer.

new
	timer;

main()
{
    timer = (lambda task = {"Timer", 1000, true});
}

// Somewhere in the code:
KillTimer(timer);