[Solved-5 Solutions] Remove duplicate from javascript array - javascript Tutorial
Problem:
How to remove duplicate values from JavaScript array ?
Solution 1:
Using jQuery:
var names = ["Mark Twain", "John Steinbeck", "William Faulkner", "William Faulkner", "Robert Frost", "Walt Whitman", "William Faulkner"];
var uniqueNames = [];
$.each(names, function(i, el){
if($.inArray(el, uniqueNames) === -1) uniqueNames.push(el);
});Solution 2:
Use this code.
let names = ['Mark Twain', 'John Steinbeck', 'William Faulkner', 'William Faulkner', 'Robert Frost', 'Walt Whitman', 'William Faulkner'];
let dup = [...new Set(names)];
console.log(dup);Solution 3:
This code using an array filter and indexOf functions:
arr = arr.filter (function (value, index, array) {
return array.indexOf (value) == index;
});Solution 4:
function removeDuplicateUsingFilter(arr){
let unique_array = arr.filter(function(elem, index, self) {
return index == self.indexOf(elem);
});
return unique_array
}
console.log(removeDuplicateUsingFilter(array_with_duplicates));Solution 5:
UniqueArray contains no duplicates.
var Array = duplicateArray.filter(function(elem, pos) {
return duplicateArray.indexOf(elem) == pos;
});