Split First and Rest

Data Structures, Operators & Stringsmedium

Course · Section 9: Data Structures, Modern Operators and Strings · Lecture 112: Rest Pattern and Parameters

Implement `splitFirst(arr)` returning `[first, rest]` where `rest` is an array of the remaining elements, using a rest element.

Input: splitFirst([1,2,3])

Output: [1,[2,3]]

Input: splitFirst([5])

Output: [5,[]]

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Common pitfalls

Approach & explanation (try first)

The rest pattern gathers everything after the first element into a new array.

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