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How to dynamically combine all provided arrays using JavaScript?
Suppose we have two arrays of literals like these −
const arr1= ['a', 'b', 'c']; const arr2= ['d', 'e', 'f'];
We are required to write a JavaScript function that takes in two such arrays and build all possible combinations from the arrays.
So, for these two arrays, the output should look like −
const output = [ad, ae, af, bd, be, bf, cd, ce, cf];
Example
The code for this will be −
const arr1= ['a', 'b', 'c']; const arr2= ['d', 'e', 'f']; const combineArrays = (...arr) => { const res = []; const combinePart = (part, index) => { arr[index].forEach(el => { const p = part.concat(el); if(p.length === arr.length){ res.push(p.join('')); return; }; combinePart(p, index + 1); }); }; combinePart([], 0); return res; } console.log(combineArrays(arr1, arr2));
Output
And the output in the console will be −
[ 'ad', 'ae', 'af', 'bd', 'be', 'bf', 'cd', 'ce', 'cf' ]
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