Question

How to loop through an array backward in Node.js

Answer 1

const arr = [4, 8, 1, 0, 9, 7, 3, 2];
  
for (let i = arr.length - 1; i >= 0; i--) {
    console.log(arr[i]);
}
 
    
         
         
/*
run:
         
2
3
7
9
0
1
8
4
         
*/

 

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Answer 2

const arr = [4, 8, 1, 0, 9, 7, 3, 2];
  
arr.slice().reverse()
   .forEach(function(item) {
            console.log(item);
        });
 
    
         
         
/*
run:
         
2
3
7
9
0
1
8
4
         
*/

 

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Answer 3

const arr = [4, 8, 1, 0, 9, 7, 3, 2];
  
arr.reduceRight((_, item) => console.log(item), null);
 
    
         
         
/*
run:
         
2
3
7
9
0
1
8
4
         
*/

 

70+ SQL courses for beginners and professionals