JAVASCRIPT

removing duplicates in array javascript

let arr = [1,2,3,1,1,1,4,5]
    
let filtered = arr.filter((item,index) => arr.indexOf(item) === index)
    
 console.log(filtered) // [1,2,3,4,5]

how to remove duplicates from array in javascript

// how to remove duplicates from array in javascript
// 1. filter()
let num = [1, 2, 3, 3, 4, 4, 5, 5, 6];
let filtered = num.filter((a, b) => num.indexOf(a) === b)
console.log(filtered);
// Result: [ 1, 2, 3, 4, 5, 6 ]

// 2. Set()
const removeDuplicates = (arr) => [...new Set(arr)];
console.log(removeDuplicates([1, 2, 3, 3, 4, 4, 5, 5, 6]));
// Result: [ 1, 2, 3, 4, 5, 6 ]

javascript remove duplicated from Array

const removeDuplicates = (arr) => [...new Set(arr)];

console.log(removeDuplicates([1, 2, 3, 3, 4, 4, 5, 5, 6]));
// Result: [ 1, 2, 3, 4, 5, 6 ]

remove duplicates from array js

const myArray = [2,5,6,2,2,4,5,3,3];

const uniqueArray = [...new Set(myArray)];

console.log(uniqueArray);

remove duplicates from array

let chars = ['A', 'B', 'A', 'C', 'B'];
let uniqueChars = [...new Set(chars)];

console.log(uniqueChars);

output:
[ 'A', 'B', 'C' ]

javascript to remove duplicates from an array

uniqueArray = a.filter(function(item, pos) {
    return a.indexOf(item) == pos; 
})

javascript remove duplicates from array

var myArr = [1, 2, 2, 2, 3];
var mySet = new Set(myArr);
myArr = [...mySet];
console.log(myArr);
// 1, 2, 3

javascript remove duplicates from array

unique = [...new Set(arr)];   // where arr contains duplicate elements

how to remove duplicates in array in javascript

const numbers = [1 , 21, 21, 34 ,12 ,34 ,12];
const removeRepeatNumbers = array => [... new Set(array)]
removeRepeatNumbers(numbers) // [ 1, 21, 34, 12 ]

javascript remove duplicates from array

// for TypeScript and JavaScript
const initialArray = ['a', 'a', 'b',]
finalArray = Array.from(new Set(initialArray)); // a, b

javascript to remove duplicates from an array

uniqueArray = a.filter(function(item, pos) {
    return a.indexOf(item) == pos;
})

how to remove duplicates in js array

let arr = [1, 2, 3, 4, 3, 3, 3]

console.log([...new Set(arr)])
// (4) [1, 2, 3, 4]

let arr = [1, 2, 3, 4, 3, 3, 3, 'foo', true]

console.log([...new Set(arr)])
//(6) [1, 2, 3, 4, 'foo', true]

remove duplicates from array javascript

function onlyUnique(value, index, self) {
  return self.indexOf(value) === index;
}

// usage example:
var a = ['a', 1, 'a', 2, '1'];
var unique = a.filter(onlyUnique);

console.log(unique); // ['a', 1, 2, '1']

Remove Duplicates array values in javascript

const array  = [5,4,7,8,9,2,7,5];
array.filter((item,idx,arr) => arr.indexOf(item) === idx);
// or
const nonUnique = [...new Set(array)];
// Output: [5, 4, 7, 8, 9, 2]

Javascript removing duplicates in array

const array = [1, 1, 2, 3, 5, 5, 1]
const uniqueArray = [...new Set(array)];

console.log(uniqueArray); // Output: [1, 2, 3, 5]

remove duplicate elements array javascript

let b = [];
for (i = 0; i < 5; i++){
a = prompt("Enter Name: ");
let d = b.push(a);
}
c = [...new Set(b)]
console.log(c)

remove all duplicates from an Array

const removeDuplicates = arr => [...new Set(arr)];

remove duplicate value from array

let chars = ['A', 'B', 'A', 'C', 'B'];
let uniqueChars = [...new Set(chars)];

console.log(uniqueChars);

remove duplicates array.filter

// removeDuplicates ES6
const uniqueArray = oldArray.filter((item, index, self) => self.indexOf(item) === index);

completely remove duplicate element from the array

var array = [1, 2, 3, 4, 4, 5, 5],
    result = array.filter(function (v, _, a) {
        return a.indexOf(v) === a.lastIndexOf(v);
    });

console.log(result); // [1, 2, 3]

remove duplicates in an Array in Javascript

let chars = ['A', 'B', 'A', 'C', 'B'];
let uniqueChars = [...new Set(chars)];

console.log(uniqueChars);

remove duplicates from array

// Use to remove duplicate elements from the array

const numbers = [2,3,4,4,2,3,3,4,4,5,5,6,6,7,5,32,3,4,5]

console.log([...new Set(numbers)])

// [2, 3, 4, 5, 6, 7, 32]

remove duplicates from array javascript

[...new Set(array)]

Remove duplicate items in an array

let myArray = ['a', 'b', 'a', 'b', 'c', 'e', 'e', 'c', 'd', 'd', 'd', 'd']
let myOrderedArray = myArray.reduce(function (accumulator, currentValue) {
  if (accumulator.indexOf(currentValue) === -1) {
    accumulator.push(currentValue)
  }
  return accumulator
}, [])

console.log(myOrderedArray)

Remove Duplicates in an Array

const removeDuplicates = (arr) => [...new Set(arr)]

removeDuplicates([31, 56, 12, 31, 45, 12, 31])
//[ 31, 56, 12, 45 ]

remove duplicates in array

uniq = [...new Set(array)];

or 

uniqueArray = a.filter(function(item, pos) {
    return a.indexOf(item) == pos;
})

remove duplicates from array javascript

arr.filter((v,i,a)=>a.findIndex(t=>(t.place === v.place && t.name===v.name))===i)

remove duplicates from array

$array = array(1, 2, 2, 3);
$array = array_unique($array); // Array is now (1, 2, 3)

remove duplicate values from array

uniqueArray = a.filter(function(item, pos) {
    return a.indexOf(item) == pos;
})

removing duplicates from array javascript

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

Removing duplicate values from an array

const uniqueValue = [...new Set([...arr])];
console.log(uniqueValue);
Output:
[1, 3, 4, 2]

how to remove duplicate values in array javascript

var car = ["Saab","Volvo","BMW","Saab","BMW",];
var cars = [...new Set(car)]
document.getElementById("demo").innerHTML = cars;

remove duplicate Array

let Arr = [1,2,2,2,3,4,4,5,6,6];

//way1
let unique = [...new Set(Arr)];
console.log(unique);

//way2
function removeDuplicate (arr){
	return arr.filter((item,index)=> arr.indexOf(item) === index);
}

removeDuplicate(Arr);

Remove Array Duplicate

const removeDuplicates = (arr) => [...new Set(arr)];

console.log(removeDuplicates([1, 2, 3, 3, 4, 4, 5, 5, 6]));
// Result: [ 1, 2, 3, 4, 5, 6 ]

javascript remove duplicates from array

let chars = ['A', 'B', 'A', 'C', 'B'];
let uniqueChars = [...new Set(chars)];

console.log(uniqueChars);
Code language: JavaScript (javascript)

Remove duplicates from array

$uniqueme = array();
foreach ($array as $key => $value) {
   $uniqueme[$value] = $key;
}
$final = array();
foreach ($uniqueme as $key => $value) {
   $final[] = $key;
}

remove duplicate item from array javascript

function remove_duplicates(arr) {
    var obj = {};
    var ret_arr = [];
    for (var i = 0; i < arr.length; i++) {
        obj[arr[i]] = true;
    }
    for (var key in obj) {
        ret_arr.push(key);
    }
    return ret_arr;
}