### orderBy Returns a sorted array of objects ordered by properties and orders. Uses a custom implementation of sort, that reduces the props array argument with a default value of 0, it uses destructuring to swap the properties position depending on the order passed. If no orders array is passed it sort by 'asc' by default. ```js const orderBy = (arr, props, orders) => [...arr].sort((a, b) => props.reduce((acc, prop, i) => { if (acc === 0) { const [p1, p2] = orders && orders[i] === 'desc' ? [b[prop], a[prop]] : [a[prop], b[prop]]; acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0; } return acc; }, 0) ); ``` ```js const users = [ { name: 'fred', age: 48 }, { name: 'barney', age: 36 }, { name: 'fred', age: 40 }, { name: 'barney', age: 34 } ]; orderBy(users, ['name', 'age'], ['asc', 'desc']); // [{name: 'barney', age: 36}, {name: 'barney', age: 34}, {name: 'fred', age: 48}, {name: 'fred', age: 40}] orderBy(users, ['name', 'age']); // [{name: 'barney', age: 34}, {name: 'barney', age: 36}, {name: 'fred', age: 40}, {name: 'fred', age: 48}] ```