Merge Sorted Arrays

Introduction

In this lab, we will explore how to merge two sorted arrays into a single sorted array using JavaScript. We will use the spread operator, Array.from(), and the shift() method to efficiently merge the arrays. By the end of this lab, you will have a deeper understanding of how to manipulate arrays in JavaScript.

Instructions for Merging Sorted Arrays in JavaScript

To merge two sorted arrays in JavaScript, follow these steps:

1. Open the Terminal/SSH and type node to start practicing coding.
2. Use the spread operator (...) to clone both of the given arrays.
3. Use Array.from() to create an array of the appropriate length based on the given arrays.
4. Use Array.prototype.shift() to populate the newly created array from the removed elements of the cloned arrays.

Here's an example code snippet to merge two sorted arrays:

const mergeSortedArrays = (a, b) => {
  const _a = [...a],
    _b = [...b];
  return Array.from({ length: _a.length + _b.length }, () => {
    if (!_a.length) return _b.shift();
    else if (!_b.length) return _a.shift();
    else return _a[0] > _b[0] ? _b.shift() : _a.shift();
  });
};

console.log(mergeSortedArrays([1, 4, 5], [2, 3, 6])); // Output: [1, 2, 3, 4, 5, 6]

In the above code, mergeSortedArrays function takes two sorted arrays as arguments and returns the merged array by following the above steps. The output for the example code is [1, 2, 3, 4, 5, 6].

Summary

Congratulations! You have completed the Merge Sorted Arrays lab. You can practice more labs in LabEx to improve your skills.