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Solve Sort Log Files using Lua Language

Solve Sort Log Files using Lua to enhance your skills with lua coding practice , master coding concepts, and prepare for interviews with practical exercises and detailed solutions.

Sort Log Files

Difficulty : Easy

Categories :

  • Sorting algorithms

Given an array of strings logs, where each log entry is of the form "id content", sort the logs with the following rules:

  1. Letter logs (content starts with letters) come before digit logs (content starts with digits)
  2. Letter logs are sorted by their content; if contents are same, sort by their IDs
  3. Digit logs maintain their relative ordering

Constraints:

  • 1 ≤ logs.length ≤ 100
  • 3 ≤ logs[i].length ≤ 100
  • All IDs are unique
  • Each log has at least one word after its ID

Examples:

Input: ["dig1 8", "let1 art", "dig2 3", "let2 own"]
Output: ["let1 art", "let2 own", "dig1 8", "dig2 3"]
Explanation: Letter logs come first, sorted by content
Input: ["dig1 1", "let1 cat", "let2 cat"]
Output: ["let1 cat", "let2 cat", "dig1 1"]
Explanation: When contents tie, sort by ID

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Choose from the following categories

Strings A sequence of characters used to represent text, with problems focused on manipulation, searching, and pattern matching.

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.