JavaScript array comparisions and display values from another

Question

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.

a for loop over the indices. if empty string get the value for that index from a? — cmgchess
– cmgchess, Commented Mar 17, 2022 at 11:13

jeremy-denis · Accepted Answer · 2022-03-17 11:26:57Z

2

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);

edited Mar 17, 2022 at 11:26

answered Mar 17, 2022 at 11:17

jeremy-denis

6,8963 gold badges24 silver badges37 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

JavaScript array comparisions and display values from another

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related