Question

How to get the difference between two arrays (elements of A1 that not found in A2) in JavaScript

Answer 1

let array1 = [1, 2, 6, 3, 9, 5];
let array2 = [5, 6, 7, 10, 11];

let difference = array1.filter(x => array2.indexOf(x) === -1);

console.log(difference);

  
    
    
/*
run:
    
[1, 2, 3, 9]
    
*/

 

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Answer 2

let array1 = [1, 2, 6, 3, 9, 5];
let array2 = [5, 6, 7, 10, 11];

let difference = array1.filter(x => !array2.includes(x));

console.log(difference);

  
    
    
/*
run:
    
[1, 2, 3, 9]
    
*/

 

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