Question 344018 in Javascript Question posted in
A very good W3school tutorial can be found here.

Javascript – Remove the duplicates

How to remove the duplicate strings in an array. I tried this which doesn’t workout.

var input = ['john','john','rio','ravi','josva','ravi'];

    let remove = function(){
    let result = [];
    for (let i = 0; i<input.length; i++){
        if(input[i] == input[i]){
            return false;
        }else{
            return true;
        }
    }
    result.push(input[i]);
    console.log(result);
    };
remove();
Tags:

3

Answers


  1. 0 
    var input = ["john", "john", "rio", "ravi", "josva", "ravi"];
var uniqueItems = input.filter((item, index, self) => {
 // returns -1 if it's not found
 return self.indexOf(item) === index; 
});
console.log(uniqueItems);
    Login or Signup to reply.
  2. 0

    You can use this code:

    var input = ['john','john','rio','ravi','josva','ravi'];
var output = input.filter (function (item, index, array) {
  return array.indexOf (item) == index;
});
console.log (output); // ['john','rio','ravi','josva']
    Login or Signup to reply.
  3. 0 
    let input = ['john','john','rio','ravi','josva','ravi'];

let remove = function(){
    let result = [];
    for (let i = 0; i < input.length; i++){
        if (result.indexOf(input[i]) === -1) {
            result.push(input[i]);
        }
    }
    return result;
};

    You can do it this way also

    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search