index.js

'use strict';

// YOU KNOW WHAT TO DO //

/**
 * each: Designed to loop over a collection, Array or Object, and applies the action 
 * Function to each value in the collection.
 * 
 * @param {Array or Object} collection The collection over which to iterate.
 * @param {Function} action The Function to be applied to each value in the 
 * collection
 */
function each(collection, action) {
    if(Array.isArray(collection)) {
        for(var i = 0; i < collection.length; i++) {
            action(collection[i], i, collection);
        }
    } else {
        for (var key in collection) {
            action(collection[key], key, collection);
        }
    }
}
module.exports.each = each;