gistfile1.js

function spread(fn) {
  return function(args){
    fn.apply(null,args);
  };
}

// ******************

function foo(x,y) {
  console.log(x,y);
}

spread(foo)([10,20]); // 10 20

// Trying to find the Functional equivalent to `spread(..)`
// Something like:

Function.apply.bind(foo)([10,20]); // undefined undefined

// see, that doesn't quite work. help?

Function.bind() allows to execute .apply() in the context of the spread / plus function (pretty much the same as plus.apply() ).
The first argument of .apply() defines the context .apply() should execute in, the second are the actual parameters as an array ( fn.apply(context, args ).

So this should also work:
Function.apply.bind(plus)(null, [1,2])

But that is not as nice.

Function.bind() also allows partial application with predefined arguments:

var plusOne = plus.bind(window, 1);
console.log(plusOne(2)); // 3

They are using this to partially apply the null value as the context for .apply()