📦 Array Problems

Welcome to the Array section of JDCodebase! Arrays are one of the most fundamental and frequently used data structures in programming. Most DSA problems begin here.

Learning how to manipulate and traverse arrays is essential for becoming a strong problem-solver. Master key concepts and strengthen your foundation with these curated problems.

🧠 What You’ll Learn

Basics: Traversal, insertion, deletion
Prefix sums, difference arrays, and window-based patterns
Sorting, searching, and optimizations with pointers
Pattern recognition like frequency counts, merging, etc.

🛠️ Useful JavaScript Methods

arr.push(val) — add at end
arr.pop() — remove from end
arr.shift(), arr.unshift(val) — front operations
arr.slice(start, end) — get subarray
arr.splice(index, count) — remove or insert
arr.includes(val), arr.indexOf(val)
arr.sort(), arr.reverse()

📝 Problems List