How to Retrieve the First N Elements of an Array in JavaScript (ES6)?

Retrieving the First N Elements of an Array

In JavaScript (ES6), obtaining the first N elements from an array can be achieved using the built-in slice() method. The original array remains unmodified.

Example:

Consider the following problem:

I have an array with a varying size and I wish to retrieve the first 3 elements. I'm looking for the JavaScript (ES6) equivalent of Linq's `take(n)` method.

Solution:

To address this issue, one can employ the slice() method as follows:

const slicedArray = originalArray.slice(0, 3);

This statement creates a new array containing the first three elements from the original array and assigns it to the variable slicedArray. The original array remains unaltered.

Alternative Approach:

Another option is to use the spread operator within the slice() method:

const slicedArray = [...originalArray].slice(0, 3);

This technique creates a shallow copy of the original array using the spread operator and then applies the slice() method to obtain the first three elements.

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