JavaScript array comparisions and display values from another-CodePudding

I have a case where I need to compare between two arrays and display values from another.; For example, I have two arrays:

let a = ['a','b','c'];
let b = ['textA' 'textB', ' '];

So, I am basically trying to loop over the array b and display value like this:

   textA
   textB
   C

So, when there are any empty values found in array b, display the same indexed values from array a.

Can anybody help with this. Thanks in advance.

CodePudding user response：

you can :

trim the value to see if there is empty or only space elem.trim().length
if string is empty check if data in other array exist if (!elem.trim().length && a[index])

let a = ['a','b','c'];
let b = ['textA', 'textB', ' '];

b.forEach((elem, index) => {
  if (!elem.trim().length && a[index]) {
    console.log(a[index]);
  } else {
    console.log(elem);
  }
});

One other solution consist to create a result array with array.map and display all key of this new array

let a = ['a','b','c'];
let b = ['textA', 'textB', ' '];


let result = b.map((elem, index) => (!elem.trim().length && a[index]) ? a[index] : elem);

console.log(result);