Chunk Array

Challenge Description

Write a function that takes an array and a chunk size as input. The function should return a new array where the original array is split into chunks of the specified size.

For example:

• chunk([1, 2, 3, 4, 5], 2) should return [[1, 2], [3, 4], [5]].
• chunk([1, 2, 3, 4, 5, 6, 7, 8], 3) should return [[1, 2, 3], [4, 5, 6], [7, 8]].

Tips to Solve

tip

1. Initialize an empty array chunked to store the chunks.
2. Use a while loop to iterate through the original array.
3. Use the slice method to create chunks of the specified size and push them into the chunked array.
4. Increment the index by the chunk size to move to the next chunk.

Step-by-Step Solution

Let's break down the solution into easy steps:

1. Initialize Variables:

   • Create an empty array chunked to store the chunks.
   • Initialize an index variable to 0 to keep track of the current position in the original array.

   const chunked = [];
   let index = 0;

2. Iterate Through the Array:

   • Use a while loop to iterate through the original array.
   • The loop should run as long as the index is less than the length of the array.

   while (index < array.length) {
     const chunk = array.slice(index, index + size);
     chunked.push(chunk);
     index += size;
   }

3. Slice the Array:

   • Use the slice method to create a chunk of the specified size starting from the current index.
   • Push the chunk into the chunked array.

   const chunk = array.slice(index, index + size);
   chunked.push(chunk);

4. Increment the Index:

   • Increment the index by the chunk size to move to the next chunk.

   index += size;

5. Return the Chunked Array:

   • After the loop completes, return the chunked array.

   return chunked;

Full Solution Code

Here is the complete solution using the steps above:

const chunk = (array, size) => {
  const chunked = [];
  let index = 0;

  while (index < array.length) {
    const chunk = array.slice(index, index + size);
    chunked.push(chunk);
    index += size;
  }

  return chunked;
};

console.log(chunk([1, 2, 3, 4, 5], 2)); // Output: [[1, 2], [3, 4], [5]]
console.log(chunk([1, 2, 3, 4, 5, 6, 7, 8], 3)); // Output: [[1, 2, 3], [4, 5, 6], [7, 8]]