js delete duplicates from array
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let unique = [...new Set(names)];
console.log(unique); // 'John', 'Paul', 'George', 'Ringo'js delete duplicates from array
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let unique = [...new Set(names)];
console.log(unique); // 'John', 'Paul', 'George', 'Ringo'how to remove identical string in javascript
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let x = (names) => names.filter((v,i) => names.indexOf(v) === i)
x(names); // 'John', 'Paul', 'George', 'Ringo'javascript remove duplicate strings from array
//ES6
let uniqueArray = [...new Set(arrayWithDuplicates)];
//Alternative
function removeArrayDuplicates(arrayWithDuplicates) {
let seen = {};
let uniqueArray = [];
let len = arrayWithDuplicates.length;
let j = 0;
for(let i = 0; i < len; i++) {
let item = arrayWithDuplicates[i];
if(seen[item] !== 1) {
seen[item] = 1;
uniqueArray[j++] = item;
}
}
return uniqueArray;
}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']Copyright © 2021 Codeinu
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