Merge Array

You are given two arrays of objects. Each object contains an id field and other key-value data. The goal is to merge the data by id.

• If an id exists in both arrays, merge the properties.
• If it exists only in one, include it as is.
• In case of conflict (same key but different values), prefer values from the second array.

Input:

• Two arrays of objects (each object has at least an id key)

Output:

• A new array with merged objects based on id

Example Inputs & Outputs

Input:
arr1 = [{ id: 1, name: "Alice" }, { id: 2, name: "Bob" }]
arr2 = [{ id: 2, age: 30 }, { id: 3, name: "Charlie" }]

Output:
[
  { id: 1, name: "Alice" },
  { id: 2, name: "Bob", age: 30 },
  { id: 3, name: "Charlie" }
]

Constraints & Edge Cases

• Arrays can be of different lengths
• Objects may have overlapping or unique fields
• Duplicate ids within a single array should not occur
• If the same field exists in both and differs, use the value from the second array