How do I pair arrays with the first one being a normal array and second one an array of arrays in Ja-CodePudding

Given the following arrays:

var arr1 = ['A','B','C'];
var arr2 = [['D','E','F']['G','H','I']]

The output 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.

This is what I currently have:

const arrays = (arr1 = [], arr2 = [],arr3 = []) => {

  // var arr3 = arr2.slice(3);
  const res = [];
  for(let i = 0; i < arr1.length; i  ){
    for(let j = 0; j < arr2.length; j  ){
      for(let s=0;s<arr3.length;s  ){
        res.push(arr1[i]   arr2[j]   arr3[s] );
      }
    }
  }

  return res;
};

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