iOS blocks,

iOS_blocks

// since iOS 4, extension C lang
//AKA, lambdas, anonimous functions, clousures

//function that can be stored as a variable (referred to as a "first-class function")
//clousure scope incorporates parent scope "close"

//encapsulate chunks of code and pass them around like any other object

//As well as containing executable code, a block also has the ability to capture state from its enclosing scope.

/*
Compared to functions
Func structure:
return type -- func name -- arguments-- body
int            myFunc       (int a)     { //code }

call:
int myVar = myFunc

STRING VARIABLE       STRING LITERAL
NSString *message = @"hola mundo";

Block structure:
      BLOCK VARIABLE           BLOCK LITERAL
int (^myFirstBlock) (int) = ^(int a) { //code }

CAN use just the block literal directly
^(int a){ // my poetry }
*/