Function prepend

Remarks

Can prepend an array or a single element

Example

import * as A from "flurp/array";

const prependOne = prepend(7);
prependOne([5, 6]);       // [7, 5, 6]

const prependMulti = prepend([7, 8]);
prependMulti ([5, 6]);    // [7, 8, 5, 6]