js把两个数组对象合并成一个一对多的数组对象

Question

大佬们求教如何把下面的两个不通长度的数组

var arr1 = [1,2];
var arr2 = [3,4,5];

合并成

[{1,3},{1,4},{1,5}]

[{2,3},{2,4},{2,5}]

Answer 1

arr1.map(i1 => arr2.map(i2 => [ i1, i2 ]))