JavaScript Coding Practice

Solve Sort by Bit Count using JavaScript Language

Solve Sort by Bit Count using JavaScript to enhance your skills with javascript coding practice , master coding concepts, and prepare for interviews with practical exercises and detailed solutions.

Sort by Bit Count

Difficulty : Medium

Categories :

  • Sorting algorithms

Given an array of integers nums, sort it according to the following rules:

  • First, group all numbers by their binary 1's count (number of set bits)
  • Numbers with the same number of 1's should be grouped together
  • Within each group, sort numbers by their decimal values in ascending order
  • Finally, concatenate all groups in ascending order of their binary 1's count

Return the sorted array.

Constraints:

  • 1 ≤ nums.length ≤ 10^4
  • 0 ≤ nums[i] ≤ 10^5
  • Must be implemented in O(n log n) time

Examples:

Input: nums = [3,5,2,7,8]
Output: [2,8,3,5,7]
Explanation:
2 = 10 (1 bit)
8 = 1000 (1 bit)
3 = 11 (2 bits)
5 = 101 (2 bits)
7 = 111 (3 bits)
Input: nums = [10,12,15,9]
Output: [12,10,9,15]
Explanation:
12 = 1100 (2 bits)
10 = 1010 (2 bits)
9 = 1001 (2 bits)
15 = 1111 (4 bits)
Within 2-bit group, sort by value

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Choose from the following categories

Arrays A collection of elements stored in contiguous memory locations, allowing efficient random access and manipulation.

Linked Lists A linear data structure where each element (node) points to the next, offering dynamic memory allocation and efficient insertions/deletions.

Trees A hierarchical data structure with nodes connected by edges, used in applications like databases, file systems, and parsing.

Graphs A collection of nodes (vertices) connected by edges, representing relationships, widely used in networking, routing, and social networks.

Dynamic Programming An optimization technique that solves problems by breaking them into overlapping subproblems and storing their results.

Backtracking A problem-solving method that explores all possibilities recursively, backtracking when a solution is not feasible.

Sorting Algorithms Techniques for arranging elements in a specific order, such as quicksort, mergesort, and bubble sort, essential for data organization.

Searching Algorithms Methods for finding elements in a dataset, such as binary search, linear search, and graph traversal techniques.

Mathematics A field of study involving numbers, calculations, and logical reasoning, forming the foundation for algorithms and problem-solving.

Recursion A programming technique where a function calls itself to solve smaller instances of the same problem, often used in divide-and-conquer approaches.

Bit Manipulation Operations performed directly on binary representations of data, used for efficient computations and optimization tasks.