JAVASCRIPT

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"]

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'));

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 repeated characters from a string in javascript

const unrepeated = (str) => [...new Set(str)].join('');

unrepeated("hello"); //➞ "helo"
unrepeated("aaaaabbbbbb"); //➞ "ab"
unrepeated("11112222223333!!!??"); //➞ "123!?"

javascript remove duplicates

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

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 javascript

function withoutDuplicates (arr) {
  return [...new Set(arr)];
}

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);