Foreach to Variable Javascript / React

Question

i want to ask something about how to join data inside variable, so basicly I have data that I foreach (because i need to change that object), then I want to enter each data that I foreach into a variable, as below:

const thisData = {["abcd","efgh"]}
for (let objData of thisData) {
    //lets say i need to change every data from word to number
    //I've managed to change it
    const newData = changetoNumber(objData)
}

then i need to save it to another variable, and now i'm stuck, can you guys help me?

//this is what i need
console.log(listnewData)
//1234 5678

Answer 1

You can use the map function to create output in the form of an array.

const start = 96; // char code of 'a' is 97 

const thisData = ["abcd","efgh"]

const toNumber = (str) => {
  const strArr = str.split('');
  return strArr.map(s => s.charCodeAt() - start).join('');
}

console.log(thisData.map(toNumber))

Answer 2

I think your Data is not proper. It may be like This

let thisData = {
     numbers : ["asas" , "sasas"],
}

for that Solution might be like this

for(const i in thisData){
  thisData.numbers = thisData[i].map((x, index) => {
    if(typeof(x) == "string"){
      return index + 1;
  }
})

}
console.log(thisData);

And your Final output is :

{
  numbers: [1, 2]
}

You can also Try out this in my JSfiddle Playground Link : https://jsfiddle.net/anks_patel/5tLnrm6c/