Remove from the Array Elements That Are Repeated

Remove duplicate values from JS array

Quick and dirty using jQuery:

var names = ["Mike","Matt","Nancy","Adam","Jenny","Nancy","Carl"];
var uniqueNames = [];
$.each(names, function(i, el){
    if($.inArray(el, uniqueNames) === -1) uniqueNames.push(el);
});

How to remove all duplicates from an array of objects?

A primitive method would be:

const obj = {};

for (let i = 0, len = things.thing.length; i < len; i++) {
  obj[things.thing[i]['place']] = things.thing[i];
}

things.thing = new Array();

 for (const key in obj) { 
   things.thing.push(obj[key]);
}

How can we delete a duplicated element in an array in C?

Here's my solution. No need to create a new array

#include <stdio.h>

int main()
{
    int arr[6] = {1,2,3,3,8,5};
    int temp,i,j, size = 6;

    for(i = 0; i < size; i++){

        for(j = i+1; j < size; j++){

            if(arr[i] == arr[j]){
                for(int k = j; k < size; k++){
                    arr[k] = arr[k+1];   
                }
                size--;
                j--;

            }    
        }
    }

    for(int k = 0; k < size; k++){
        printf("%d,",  arr[k]);
    }

    return 0;
}

Thanks for all the help

how to remove first element of duplicate in an array of objects

This will give you an array with the last value for duplicated elements, in preserved order. If you want exactly the 2nd one you need an extra flag

array=[{id:34,value:45}, {id:23,value:35}, {id:34,value:28}]




const obj = array.reduce ( (acc,cur,index) => {
  acc[cur.id] = {index:cur};
  return acc;
},{});

const output = Object.values(obj).sort( (a,b) => a.index - b.index).map( ({index:val}) => val )

console.log(output)

const a = ['Ronaldo', 'Pele', 'Maradona', 'Messi', 
           'Pele', 'Messi', 'Jair', 'Baggio', 'Messi', 
           'Seedorf'];

const uniqueArray = a.filter(function(item) {
  return a.lastIndexOf(item) == a.indexOf(item);
});

console.log(uniqueArray);
/* output:  ["Ronaldo", "Maradona", "Jair", "Baggio", "Seedorf"] */