一个数组怎么在随机位置插入多个元素

Question

比如var a = [1,2];var b = ['a','b','c','d','e','f','g','h','i'];怎么把a数组中的元素随机插入到b数组内，数组b的排序不变

Answer 1

function randomInsert(arr1, arr2) {

    arr1.forEach(value =>

        arr2.splice(Math.random() * arr2.length, 0, value))

    return arr2;

}

var a = [1, 2];

var b = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i'];

console.log(randomInsert(a, b));