The JavaScript Interview Handbook: 100+ Interview Questions/

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Solution Review: Insert Elements

Solution Review: Insert Elements

This lesson will explain the solution to the problem in the previous lesson.

We'll cover the following...

The challenge in the previous lesson requires you to fix the following code using your understanding of the .splice function.

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function solSplice(array1, array2, n) {
  return array2.splice(n,0,array1)
}
console.log(solSplice([1, 2, 3],[4,5,6],1))
console.log(solSplice([8,9,10],[11,12,13],2))

Explanation

The original code has two issues that need fixing; let’s take a look at them one by one.

Issue 1

The first change we make is the line 2 of the code.

  return array2.splice(n,0,array1)

The splice method is used to add/remove items from an array. It returns an array with any elements that were removed. It ...