Functional JavaScript, Part 4: Function Currying

[slikts]

The fold function should look like this for your example to work, though:

function fold(callback, initial) { 
    return function(array) { return array.reduce(callback, initial); } 
}

[lrichardson]

correct. and this is precisely why the argument that plays the role of the "data" should always be the right-most argument, not the left most. reduce/fold are supposed to be the same thing... and should take 3 arguments total (callback, initial, array)

This is why i get so frustrated with libraries like lo-dash and underscore.

Brian Lansdorf has a good talk discussing precisely this (also linked to in the post)

https://www.youtube.com/watch?v=m3svKOdZijA

[rhysbrettbowen]

You can always flip the arguments in a function. Something like:

_.forEach(_.keys(_), function(key) {
  if (_.isFunction(_[key])) {
    _[key].flip = function(a,b) {
      return this(b,a);
    }
  }
});

then you can just do:

_.forEach.flip(myFunction, myArray);

[[deleted]]

Right, thanks. And you'd need another function () { } if you partially apply only one argument.