Combine and interleave two arrays into one

Other Questions JavaScript
1

I need to merge two separate arrays into a single array where the elements from each original array alternate. For example, given the arrays [1, 3, 5] and [2, 4, 6], the output should be [1, 2, 3, 4, 5, 6]. What approach can I take to achieve this, maintaining the alternating pattern? A solution in JavaScript or Python would be beneficial.

2

"Hey there! You can totally blend two arrays into a single one with elements alternating. Here’s a quick way to do it in JavaScript:

function alternateMerge(arr1, arr2) {
  const mergedArray = [];
  const maxLength = Math.max(arr1.length, arr2.length);

  for (let i = 0; i < maxLength; i++) {
    if (i < arr1.length) mergedArray.push(arr1[i]);
    if (i < arr2.length) mergedArray.push(arr2[i]);
  }

  return mergedArray;
}

const array1 = [1, 3, 5];
const array2 = [2, 4, 6];
console.log(alternateMerge(array1, array2)); // Output: [1, 2, 3, 4, 5, 6]

This approach keeps things neat and easy. Just loop through the arrays and snag the elements by their index. Works like a charm! Let me know if you’d like more help on this. :blush:"

3

Hey! You can use this concise JavaScript function:

const alternateMerge = (arr1, arr2) => arr1.flatMap((v, i) => [v, arr2[i]]).filter(Boolean);

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

This merges the arrays by alternating elements.

4

Hey there! Looking to mix two arrays in an alternating pattern? Here’s a nifty solution using JavaScript. It’s both simple and elegant:

function mergeAlternating(arr1, arr2) {
  return arr1.reduce((acc, curr, i) => {
    acc.push(curr, arr2[i]);
    return acc;
  }, []).filter(Boolean);
}

const firstArray = [1, 3, 5];
const secondArray = [2, 4, 6];
console.log(mergeAlternating(firstArray, secondArray)); // Output: [1, 2, 3, 4, 5, 6]

This function leverages reduce to smoothly interlace the arrays. Give it a go, and let me know if it hits the spot!