How Can I Merge Two Arrays of Objects Based on a Shared Key Without Explicit Key Iteration?

Merging Arrays of Objects Based on a Key

Objective

The task is to merge two arrays of objects based on a common key without iterating through their keys.

Example Scenario

Consider the following two arrays:

Array 1:
[
  { id: "abdc4051", date: "2017-01-24" },
  { id: "abdc4052", date: "2017-01-22" }
]

Array 2:
[
  { id: "abdc4051", name: "ab" },
  { id: "abdc4052", name: "abc" }
]

The goal is to merge these arrays based on the id key to obtain:

[
  { id: "abdc4051", date: "2017-01-24", name: "ab" },
  { id: "abdc4052", date: "2017-01-22", name: "abc" }
]

Solution without Iterating Through Keys

To achieve this without iterating through object keys:

let arr1 = [
    { id: "abdc4051", date: "2017-01-24" },
    { id: "abdc4052", date: "2017-01-22" }
];

let arr2 = [
    { id: "abdc4051", name: "ab" },
    { id: "abdc4052", name: "abc" }
];

let arr3 = arr1.map((item, i) => Object.assign({}, item, arr2[i]));

console.log(arr3);

This code uses the Object.assign() method to merge the properties of objects at the same index in both arrays. The result is a new array with the combined properties of both arrays.

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