Cacher is the code snippet organizer for pro developers

// sum
const sum = nums => nums.reduce((total, num) => total + num, 0);

const nums = [2, 3, 4, 5, 6];
console.log(sum(nums));

// filter
const filter = (func, array) => array.reduce((acc, item, index, array) => {
	return func(item, index, array) ? [...acc, item] : acc;
}, []);

const filterdNums = filter(num => num > 4, nums);
console.log(filterdNums);

// map
const map = (func, array) => array.reduce((acc, item, index, array) => {
	return [...acc, func(item, index, array)];
}, []);

const double = num => num * 2;

const doubledNums = map(double, nums);
console.log(doubledNums);

// path
const path = (paths, obj) => paths.reduce((obj, path) => obj && obj[path], obj);

const obj = {a: {b: {c: 5}}};
console.log(path(['a', 'b', 'c'], obj));

// flatten
const flatten = array => array.reduce((acc, item) => [...acc, ...item], []);

const array = [[1, 2, 3], [4, 5, 6]];
console.log(flatten(array));

// pipe
const pipe = (...fns) => arg => fns.reduce((feed, func) => func(feed), arg);

const curry2 = func => a => b => func(a, b);
const curryedMap = curry2(map);

const increase = num => num + 1;

pipe(
	double,
	increase,
	console.log,
)(4)

pipe(
	curryedMap(double),
	sum,
	console.log,
)(nums);