Question

How to compare two arrays in Node.js

Answer 1

let arr1 = [1, 2, 5, 9];
let arr2 = [1, 2, 5, 9];
 
let equal = JSON.stringify(arr1) === JSON.stringify(arr2);
 
console.log(equal);
 
 
     
     
/*
run:
     
true
     
*/

 

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Answer 2

let arr1 = [1, 2, 5, 9, 8];
let arr2 = [1, 2, 5, 9, 8];
 
let equal = arr1.toString() === arr2.toString();
 
console.log(equal);
 
 
     
     
/*
run:
     
true
     
*/

 

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Answer 3

let arr1 = [1, 2, 5, 9, "a"];
let arr2 = [1, 2, 5, 9, "a"];
  
if (arr1.length == arr2.length &&
    arr1.every(function(element, i) {
        return element === arr2[i];
    })) {
   console.log(true);
} else {
   console.log(false);
}
 
  
      
      
/*
run:
      
true
      
*/

 

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