Javascript Spreadable Functions

spreadable_functions.js

function spreadable(f) {
  return function() {
    return f.apply(null, _.flattenDeep(arguments))
  };
}

var a = spreadable(function (a, b, c, d, e, f, g, h) {
  return [a, b, c, d, e, f, g, h];
});

// regular
a(1, 2, 3, 4, 5, 6, 7, 8);
// [1, 2, 3, 4, 5, 6, 7, 8]

// handle empty arrays
a([1,2,3],[4], 5, [], [[], []]);
// [1, 2, 3, 4, 5, undefined, undefined, undefined]

// nested arrays
a([[1],[[2],[3]]], [4], 5, [[[[[6,7]]],8]]);
// [1, 2, 3, 4, 5, 6, 7, 8]

// more arguments than needed
a([[1],[[2],[3]]], [4], 5, [[[[[6,7]]]]],8,9);
// [1, 2, 3, 4, 5, 6, 7, 8]

// less arguments than needed (should fill the rest with undefineds)
a();
// [undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined]

var drawPixel = spreadable(function(x,y,r,g,b,a,ctx){});
var pixel = [10,10];
var white = [255, 255, 255, 255];

drawPixel(pixel, white, ctx);

//Update from the future: spread operator
drawPixel(...pixel, ...white, ctx)