The Fusion Protocol
Easy+20 XP
Mission Briefing
Two rival factions have finally agreed to an alliance. You must write a fusion protocol that safely merges both factions' rosters into a unified team.
The Concept: Merging Arrays
The .concat() method merges two or more arrays end-to-end. It does not change the original arrays but returns a brand new combined array.
Example: [1].concat([2]) // Returns [1, 2]
The Objective
Your function receives two arrays: arr1 and arr2.
- Merge them together so that all elements of
arr1appear first, followed by all elements ofarr2. - Return the single newly combined array.
01EXAMPLE 1
Input
arr1 = [1, 2], arr2 = [3, 4]Output
[1, 2, 3, 4]Constraints
- Use the .concat() method.
CoreArraysMethods
JavaScriptSystem handles I/O — write your function only
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Input Arguments
arr1[1,2]
arr2[3,4]
Expected Output
[1,2,3,4]
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