how do I Pair arrays with the first one being a normal array and second one a an array of arrays in-CodePudding

[enter image description here][1]for example

var arr1 = ['A','B','C'];
var arr2 = [['D','E','F']['G','H','I']]
the outcome should be: 
['ADG','ADH','ADI','AEG','AEH','AEI','AFG','AFH','AFI','BDG','BDH','BDI'.....]

but it should also be dynamic so that if another array is added to arr2 it should pick that as well

below is a picture of how its being implemented currently [1]: https://i.stack.imgur.com/JtfD9.png

CodePudding user response：

The fact that you have those two different array variables is immaterial. Could just throw everything together¹ and use reduceRight():

const arrays = [['A','B','C'], ['D','E','F'], ['G','H','I']];

const combine = (arrays) =>
    arrays.reduceRight((a, v) => v.flatMap(c => a.map(r => c   r)));

console.log(combine(arrays));

^{¹ For your case that would be as simple as const arrays = [arr1, ...arr2];}

CodePudding user response：

 var arr1 = ['A','B','C'];
  var arr2 = [['D','E','F'],['G','H','I'],['J','K','L'],['M','N','O']];
  const arr3 = [];
  
arr1.forEach((item,index)=>{

if(arr2.length >= index)
{
  

  arr2.forEach((el,i)=>{

    el.forEach((char,charIndex)=>{
                  let combination = item
        combination  = char
      
     for(let j=1;j<arr2.length;j  ){
               if(arr2[j]){
                 combination  = arr2[j][charIndex]
                  }
        }
  arr3.push(combination)
    })
            
  })

}
  })
  
  console.log(arr3)

here is what I did