Chunk an Array

📌 Definition:

📖 Detailed Explanation:

Iterate in steps of size, slicing each window. slice safely handles the final partial chunk. Guard against size <= 0.

💻 Solutions:

• JavaScript

function chunk(arr, size) {
  if (size <= 0) throw new Error('size must be > 0');
  const out = [];
  for (let i = 0; i < arr.length; i += size) {
    out.push(arr.slice(i, i + size));
  }
  return out;
}

🔑 Key Points:

• Step the index by 'size' and slice each window
• slice(i, i+size) handles the last partial chunk automatically
• Validate size > 0 to avoid an infinite loop
• O(n) time

🌍 Real-World Example: