如何将数组分组为对象的键

Question

I'm struggling to group array as a key to an object.

var a = ["fruit1", "fruit2", "fruit3"]
var b = ["apple", "banana", "Orange"];
var obj = {};
a.forEach((x) => {
    b.forEach((y) => {

        obj[x] = y;
    })

})
console.log(obj)

OUTPUT:

{​fruit1:apple,fruit2:banana:fruit3:orange}​

Answer 1

In the inner loop you rewrite all object values with the last element of b . Try this to utilize the index argument of .forEach() :

 var a = ["fruit1", "fruit2", "fruit3"]; var b = ["apple", "banana", "Orange"]; var obj = {}; a.forEach((x, i) => { obj[x] = b[i]; }); console.log(obj)

Answer 2

You can use zipObj function from ramda library which convert your arrays to an object just like below:

 const a = ["fruit1", "fruit2", "fruit3"] const b = ["apple", "banana", "Orange"]; const obj = R.zipObj(a, b) //{"fruit1": "apple", "fruit2": "banana", "fruit3": "Orange"} console.log(obj)

Answer 3

You could build an array of entries and then an object from it.

 const keys = ["fruit1", "fruit2", "fruit3"], values = ["apple", "banana", "Orange"], result = Object.fromEntries(keys.map((key, i) => [key, values[i]])); console.log(result);