Question 36063 in Jquery Question posted in
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Create new array object value from two different array with equal length in JavaScript – Jquery

Need to create new array object from two other arrays in JS

var array1 = ['one', 'two', 'one, 'two'];
var array2 = ['3', '4', '5', '6'];

Here array1[0] = one represents array2[0] = 3 and vice versa.

Need to create a new array object with array1’s value as its key and array2’s value as its value

Output needed

var arrayObj = {"one": [{"0":"3", "1":5} ],"two": [{"0":"4", "1":6}]}

Here 3 and 5 in array2 should push to index "one" and 4 and 6 in array2 should push to index "two" ?

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2

Answers


  1. 0

    Take an object and collect the value and build a new object with the wanted structure.

    const
    combine = (a, b) => {
        const temp = {};
        for (let i = 0; i < array1.length; i++) (temp[a[i]] ??= []).push(b[i]);
        return temp;
    },
    array1 = ['one', 'two', 'one', 'two'],
    array2 = ['3', '4', '5', '6'],
    result = Object.fromEntries(Object
        .entries(combine(array1, array2))
        .map(([k, a]) => [k, Object.assign({}, a)])
    );

console.log(result);
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  2. 0

    Maybe I am mistaken, but it seems to me that OP wants something like this:

    function map2(a1,a2){
  return a1.reduce((a,c,i)=>{
   (a[c]??=[]).push(a2[i]);
   return a;
  },{})
}
const
  array1 = ['one', 'two', 'one', 'two'],
  array2 = ['3', '4', '5', '6'];
    
console.log(map2(array1,array2));
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