ramda functional js exercice

ramda.js

// Exercise 1
//==============
// Refactor to remove all arguments by partially applying the function

var words = function(str) {
  return _.split(' ', str);
};

var match = R.curry(function(what, x) {
  return x.match(what);
});

var split = R.curry(function(what, x) {
    return x.split(what);
});

words = split(' ');

// Exercise 1a
//==============
// Use map to make a new words fn that works on an array of strings.

var sentences = R.map(words);

// Exercise 2
//==============
// Refactor to remove all arguments by partially applying the functions

var filterQs = function(xs) {
  return _.filter(function(x){ return match(/q/i, x);  }, xs);
};

var filter = R.curry(function(f, xs) {
  return xs.filter(f);    
});

filterQs = filter(match(/q/i));

// Exercise 3
//==============
// Use the helper function _keepHighest to refactor max to not reference any
// arguments

// LEAVE BE:
var _keepHighest = function(x,y){ return x >= y ? x : y; };

// REFACTOR THIS ONE:
var max = function(xs) {
  return _.reduce(function(acc, x){
    return _keepHighest(acc, x);
  }, -Infinity, xs);
};

var reduce = R.curry(function(f, a, xs) {
    return xs.reduce(f, a);
});

var max = reduce(_keepHighest, 0);

// Bonus 1:
// ============
// wrap array's slice to be functional and curried.
// //[1,2,3].slice(0, 2)
var slice = R.curry(function(s,e, xs) {
  return xs.slice(s,e);
});

var xs = [1,2,3,4,5];
var s = slice(1, 3);
s(xs);