JAVASCRIPT
js delete duplicates from array
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let unique = [...new Set(names)];
console.log(unique); // 'John', 'Paul', 'George', 'Ringo'
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]
javascript remove duplicates
var arr = ["apple", "mango", "apple", "orange", "mango", "mango"];
function removeDuplicates(arr) {
return arr.filter((item,
index) => arr.indexOf(item) === index);
}
console.log(removeDuplicates(arr)); // ["apple", "mango", "orange"]
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 duplicate letters in a string
function removeDuplicateCharacters(string) {
return string
.split('')
.filter(function(item, pos, self) {
return self.indexOf(item) == pos;
})
.join('');
}
console.log(removeDuplicateCharacters('baraban'));
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 the duplicate character in string js
function removeDuplicate(str, letSingleChar = false) {
let string = str;
for (element of string) {
const re = new RegExp(element, 'g');
if (string.match(re)?.length > 1) {
if (letSingleChar == true) {
string = [...new Set(string.split(''))].join('');
} else
string = string.replace(re, '');
}
}
return string;
}
console.log(removeDuplicate("Hello World", true)) // Helo Wrd
console.log(removeDuplicate("Hello World", false )) // He Wrd
remove duplicates from array js
const myArray = [2,5,6,2,2,4,5,3,3];
const uniqueArray = [...new Set(myArray)];
console.log(uniqueArray);
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]
js delete duplicates from array
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
function removeDups(names) {
let unique = {};
names.forEach(function(i) {
if(!unique[i]) {
unique[i] = true;
}
});
return Object.keys(unique);
}
removeDups(names); // // 'John', 'Paul', 'George', 'Ringo'
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]
javascript remove duplicates
uniq = [...new Set(array)];
remove duplicates in an Array in Javascript
let chars = ['A', 'B', 'A', 'C', 'B'];
let uniqueChars = [...new Set(chars)];
console.log(uniqueChars);
JavaScript remove duplicate items
function onlyUnique(value, index, self) {
return self.indexOf(value) === index;
}
// usage example:
let a = ['a', 1, 'a', 2, '1'];
let unique = a.filter(onlyUnique);
console.log(unique); // ['a', 1, 2, '1']
remove duplicates from array javascript
remove duplicates from array javascript
arr.filter((v,i,a)=>a.findIndex(t=>(t.place === v.place && t.name===v.name))===i)
remove duplicates javascript
function withoutDuplicates (arr) {
return [...new Set(arr)];
}
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);
});
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;
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 duplicate values from string in javascript
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let unique = [...new Set(names)];
console.log(unique);
remove duplicate name from array javascript
const allNames = ['Nathan', 'Clara ', 'Nathan', 'Fowler', 'Mitchell', 'Fowler', 'Clara ', 'Drake', 'Fowler', 'Clyde ', 'Mitchell', 'Clyde '];
function checkName(names) {
const uniqueName = [];
for (let i = 0; i < names.length; i++) {
const nameIndex = names[i];
if (uniqueName.includes(nameIndex) == false) {
uniqueName.push(nameIndex);
}
}
return uniqueName;
}
const uniqueNames = checkName(allNames);
console.log(uniqueNames);
how to remove duplicates in js
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let unique = [...new Set(names)];
console.log(unique);