如何使用 Lodash 编写嵌套的 for 循环?

Question

arr1 = ['a', 'b', 'c'] ;
arr2 = ['1', '2', '3', '4'];

我

// run time
query() {
stuff1 = a;
stuff2 = 1;
}
query() {
stuff1 = a;
stuff2 = 2;
}
query() {
stuff1 = a;
stuff2 = 3;
}
query() {
stuff1 = a;
stuff2 = 4;
}
query() {
stuff1 = b;
stuff2 = 1;
}
query() {
stuff1 = b;
stuff2 = 2;
}
query() {
stuff1 = b;
stuff2 = 3;
}
query() {
stuff1 = b;
stuff2 = 4;
}
...
query() {
stuff1 = c;
stuff2 = 6;
}

如何编写代码？

_.map(arr1, (res) => { reutrn _.map(arr2, (res2, res1) => ... } blabla

我没有任何想法...

如果我使用 zipWith， a：1 b：2 c：3 ...但我不想要它

谢谢

Answer 1

var arr = _.chain(arr1).map((item) => {
return _.map(arr2, (item2) => {
return {
stuff1: item,
stuff2: item2
}
})
}).flatten().value();

输出：

https://jsfiddle.net/htreL1of/3/