I need to split an array into N number of arrays based on searching for an element from another array

Question

I need to split an array into N number of arrays based on searching for an element from another array.

consider this scenerio

var test = ["1","2","3","env","6","7","8","uat","2344","wersdf","sdfs"];
var test2=["env","uat"];

now I want a map like

{
env:["6","7","8"],
uat:["2344","wersdf","sdfs"]
}

Note that the array items in test2 and test1 is dynamic.But two test2 values will not be coming one after another in the test array, there will be some items between it.

Answer 1

You could do with Array#Reduce

1. First iterate the test2 array and match the index of test
2. Then use the forloop with starting value ind+1 .it will target the next argument of delimiter
3. After pass the value to array using acc[b].push()
4. Then detect next delimiter using test2.indexOf(test[i]) == -1 on else condition.That time you need to break the statement.Then again start the second argument of test2

function maper(test, test2) {
  return test2.reduce((acc, b) => {
    let ind = test.indexOf(b); //detect starting index of delimiter
    if (ind > -1) {
      acc[b] = acc[b] || []; 
      for (var i = ind+1; i < test.length; i++) {
        if (test2.indexOf(test[i]) == -1) { //detet next delimiter reach
          acc[b].push(test[i])
        }else{
         break;
        }
      }
    }
    return acc
  }, {})
  
}

var test = ["1", "2", "3", "env", "6", "7", "8", "uat", "2344", "wersdf", "sdfs"];
var test2 = ["env", "uat"];

console.log(maper(test, test2))