How to Implement Python's Zip Function in JavaScript?

JavaScript Equivalent of Python's Zip Function

The Python Zip function is commonly used to combine multiple arrays of equal length into pairs, forming a new array. JavaScript provides a similar functionality through the implementation of the Array.prototype.map() method and a helper function. Here's how you can achieve this:

function zip(...arrays) {
  return arrays[0].map((_, i) => arrays.map(arr => arr[i]));
}

Let's illustrate how this function behaves:

Consider three arrays of equal length:

const array1 = [1, 2, 3];
const array2 = ['a', 'b', 'c'];
const array3 = [4, 5, 6];

Using our zip function:

const result = zip(array1, array2, array3);

The result would be as follows:

result = [[1, 'a', 4], [2, 'b', 5], [3, 'c', 6]];

It effectively pairs the corresponding elements from each array into a sub-array.

However, it's important to note that our JavaScript implementation doesn't have the same functionality as Python's zip function when handling unequal array lengths. In Python, the zip function combines arrays of unequal length and stops at the length of the shortest array. In our JavaScript implementation, it will exclude elements from the longer arrays that fall beyond the length of the shortest array.

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