Curried JS pipe function

pipe.js

/**
 * JS Curried Pipe Function
 * 
 * @param {array} arr input function chain
 * @example
 * let calculateCost = pipe([
 *   products => products.reduce(plus), // Total Price
 *   price => price * 1.2,              // Tax
 *   price => price - 50                // Discount
 * ]);
 * calculateCost([3, 5, 2.5, 10, 40])
 * // => 22.599999999999994
 * @returns {(start:*) => *} a function accepting an initial argument
 */
let pipe = arr => start => arr.reduce((acc, curr, i) => curr(acc, i), start);