Yes, Yet another functional library toolkit. This is just a collection of functional programming tools that have been useful for me.
Wraps a given function within a bound function that applies a given this context and any optional left and right arguments. Like Function.bind, it provides context and argument binding to a function. It also provides right argument binding and has a more readable binding API.
Examples:
1.) this context binding:
GLOBAL.name="global scope";
GLOBAL.description="the default this context, harmless, but mostly unintented.";
// a simple robot object
var robot = {
name : 'Robot',
description : 'a killing machine',
describeSelf: function(){
console.log("Hello, my name is ", this.name, ", and I am ", this.description);
}
};
// the robot describes itself
robot.describeSelf();
// the same thing
fn.bind(robot.describeSelf, robot)();
// the same thing
fn.bind(robot.describeSelf).ctx(robot)();
// binds to global scope by default
fn.bind(robot.describeSelf)();
/** Output:
Hello, my name is Robot , and I am a killing machine
Hello, my name is Robot , and I am a killing machine
Hello, my name is Robot , and I am a killing machine
Hello, my name is global scope , and I am the default this context, harmless, but mostly unintented.
**/2.) Left argument binding
function command(who, what, act, upon){
console.log(who + " " + what + ": " + act + " " + upon);
}
var simonSays = fn.bind(command).lbind("Simon", "says");
simonSays("Jump", "on one leg");
simonSays("Spin", "around");
/** Output:
Simon says: Jump on one leg
Simon says: Spin around
**/3.) Right argument binding
function command(who, what, act, upon){
console.log(who + " " + what + ": " + act + " " + upon);
}
var commandToJump = fn.bind(command).rbind("says", "Jump", "on one leg");
commandToJump("Simon");
commandToJump("Peter");
commandToJump("Martha");
/** Output:
Simon says: Jump on one leg
Peter says: Jump on one leg
Martha says: Jump on one leg
**/Makes a given function curriable. A curriable function of a given arity that collects their given arguments and return another curriable function, if the number of arguments is less than its arity, otherwise it runs its code.
Example:
function add(x, y){
return x + y;
}
var plus = fn.curry(add, 2);
console.log( plus(5)(2) );
console.log([1,2,3,4,5].map(plus(5)));
/** Output:
7
[ 6, 7, 8, 9, 10 ]
**/
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