JavaScript: Create an array of elements, ungrouping the elements in an array produced by zip and applying the provided function

JavaScript fundamental (ES6 Syntax): Exercise-106 with Solution

Write a JavaScript program to create an array of elements, ungrouping the elements in an array produced by zip and applying the provided function.

• Use Math.max(), Function.prototype.apply() to get the longest subarray in the array, Array.prototype.map() to make each element an array.
• Use Array.prototype.reduce() and Array.prototype.forEach() to map grouped values to individual arrays.
• Use Array.prototype.map() and the spread operator (...) to apply fn to each individual group of elements.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const unzipWith = (arr, fn) =>
  arr
    .reduce(
      (acc, val) => (val.forEach((v, i) => acc[i].push(v)), acc),
      Array.from({
        length: Math.max(...arr.map(x => x.length))
      }).map(x => [])
    )
    .map(val => fn(...val));

console.log(unzipWith([[1, 10, 100], [2, 20, 200]], (...args) => args.reduce((acc, v) => acc + v, 0)));

Sample Output:

[3,30,300]

Pictorial Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-106-1 by w3resource (@w3resource) on CodePen.

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