diff --git a/snippets/orderBy.md b/snippets/orderBy.md new file mode 100644 index 000000000..6dbfaa53e --- /dev/null +++ b/snippets/orderBy.md @@ -0,0 +1,26 @@ +### 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[i] === 'asc' ? [a[prop], b[prop]] : [b[prop], a[prop]]; + acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0; + } + return acc; + }, 0) + ); +/* +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}] +*/ +``` +