Question

How to remove trailing nulls (0) from byte array in JavaScript

Answer 1

function removeTrailingNulls(byteArray) {
    let end = byteArray.length - 1;
    
    while (end >= 0 && byteArray[end] === 0) {
        end--;
    }
    
    return byteArray.slice(0, end + 1);
}

let byteArray = [1, 2, 3, 0, 0, 0, 0];
let trimmedArray = removeTrailingNulls(byteArray);

console.log(trimmedArray); 



/*
Run:

[ 1, 2, 3 ]

*/


 

 

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Answer 2

function removeTrailingNulls(byteArray) {
    let lastIndex = byteArray.lastIndexOf(0);
    
    while (lastIndex === byteArray.length - 1) {
        byteArray.pop();
        lastIndex = byteArray.lastIndexOf(0);
    }
    
    return byteArray;
}

let byteArray = [1, 2, 3, 0, 0, 0, 0];
let trimmedArray = removeTrailingNulls(byteArray);

console.log(trimmedArray); 



/*
Run:

[ 1, 2, 3 ]

*/

 

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Answer 3

function removeTrailingNulls(byteArray) {
    let lastIndex = byteArray.findLastIndex(byte => byte !== 0);
    
    return byteArray.slice(0, lastIndex + 1);
}

let byteArray = [1, 2, 3, 0, 0, 0, 0];
let trimmedArray = removeTrailingNulls(byteArray);

console.log(trimmedArray); 



/*
Run:

[ 1, 2, 3 ]

*/

 

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Answer 4

function removeTrailingNulls(byteArray) {
    while (byteArray.length > 0 && byteArray[byteArray.length - 1] === 0) {
        byteArray.pop();
    }
    
    return byteArray;
}

const byteArray = [1, 2, 3, 0, 0, 0, 0];
const trimmedArray = removeTrailingNulls(byteArray);

console.log(trimmedArray); 



/*
Run:
 
[ 1, 2, 3 ]
 
*/

 

70+ SQL courses for beginners and professionals