JavaScript 数组比较和显示来自另一个的值

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.

Answer 1

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);