javascript compare duplicates in array

let strArray = [ "q", "w", "w", "w", "e", "i", "u", "r"];
let findDuplicates = arr => arr.filter((item, index) => arr.indexOf(item) != index)

console.log(findDuplicates(strArray)) // All duplicates
console.log([...new Set(findDuplicates(strArray))]) // Unique duplicates

View another examples Add Own solution

Log in, to leave a comment

4

5

Parth Shah 115 points

                                    function getDuplicateArrayElements(arr){<br/>    var sorted_arr = arr.slice().sort();<br/>    var results = [];<br/>    for (var i = 0; i &lt; sorted_arr.length - 1; i++) {<br/>        if (sorted_arr[i + 1] === sorted_arr[i]) {<br/>            results.push(sorted_arr[i]);<br/>        }<br/>    }<br/>    return results;<br/>}<br/><br/>var colors = [&quot;red&quot;,&quot;orange&quot;,&quot;blue&quot;,&quot;green&quot;,&quot;red&quot;,&quot;blue&quot;];<br/>var duplicateColors= getDuplicateArrayElements(colors);//[&quot;blue&quot;, &quot;red&quot;]

Thank you! 5

4 (5 Votes)

0

Are there any code examples left?

Find Add Code snippet

New code examples in category Javascript

Javascript 2023-04-21 22:52:36
Javascript 2022-03-27 22:25:20 javascript download string as file
Javascript 2022-03-27 21:40:22 sort numbers in array javascript
Javascript 2022-03-27 21:20:04 compare two arrays and return the difference javascript
Javascript 2022-03-27 21:15:02 javascript regex french phone number
Javascript 2022-03-27 21:05:03 cypress custom error message
Javascript 2022-03-27 21:00:05 create element javascript with id
Javascript 2022-03-27 20:40:57 feather icons react
Javascript 2022-03-27 20:20:01 how to make graphql request in axios
Javascript 2022-03-27 20:15:07 bootstrap validator password and confirm password

Create a Free Account

Unlock the power of data and AI by diving into Python, ChatGPT, SQL, Power BI, and beyond.

Develop soft skills on BrainApps

Complete the IQ Test

Relative searches

javascript create array with repeated values javascript compare duplicates in array js comparison operators javascript includes duplicate javascript array how many duplicates check check duplicate in js How do you find the duplicate number on a given integer array? javascript check if theres duplicates in array check for repeated values in list js if string is duplicate in array don't add javascript how to find repeating elements in an array js check if duplicate in array javascript array finding duplicates duplicate elements in array checking for duplicates in an array js check if an array contains a duplicate elements list return in js Check if an array contains a duplicate number get duplicate from string list in javascript javascript get only duplicate values in array check if array contains duplicates javascript js array diff duplicate javasctipt check if a item repeats in an array validation for duplicate entries in javascript javascript get duplicated array ids number of duplicate elements in array js how to check if array has duplicates array of duplicates js check for non duplicates in two lists javascript check for duplicates in two lists javascript check for array duplicates numbers how to find duplicates elements in an array javascript check repeated values in array javascript javascript find duplicates in array without built in function know an element is duplicate string array javascript find duplicates in two different arrays javascript find duplicate array in an array and count javascript javascript check duplicates in array duplicate elements in array javascript how to find number of duplicate elements in an array in javascript using logic how to make count for repeated elements in array javascript javascript count duplicates in array find duplicateletter in array js js foreach compare each element for duplicates check array is repeated values javascript duplicate entries in array js list duplicate numbers in array javascript how to get every duplicate list in javascript how to check if something you will append to array is duplicate javascript how to check if element is repeated in array javascript check array duplicate js check duplicates in array to check for same values in single array javascriopt how to check duplicates in 2 arrays js how to check for duplicates in arry javascript check array no duplicates Find duplicate element in array duplicate an array js duplicate elements in array in javascript typescript check duplicates in array duplicate from array how to check if there is no duplicate of a number in an array count repeated elements in an array javascript javascript find duplicate li in ul how to check duplicated number in an array in js how to check if array has duplicate values duplicate element in array javascript array dublicate count extract array duplicates js how to check if array includes duplicate how to count duplicate values in array javascript find duplicates in a given array javascript how to check if an item is repeated in array js find duplicate values in array js how to check if there are duplicates in an array duplicates in js js duplicate array javascript array find duplicate check if an array has duplicate values find duplicate values javascript array check if there duplicates in two arrays javascript check if there duplicates in multiple array javascript js check array duplicates how to check duplicate elements in array how to find duplicate array in javascript js find all duplicates and count and index check if element is repeated in array javascript duplicate number in array find duplicate values in array typescript return duplicates in array javascript how to check same value in array javascript how to check if there are duplicates in an array javascript js check if array has duplicates find repeated number in array es6 typescript check duplicate in array check if there are duplicates in array javascript how to check duplicate entry in array while push javascript array item not duplicate javascript returning duplicated values js array How to find out how many times an item is repeated in an array js find duplicate values js find all duplicates js check array against completed array for duplicate values array duplicate in javascript array contains duplicate elements count the duplicate elements in array in javascript find all duplicates in javascript array search duplicate values in 2 arrays js array duplicate js how to get duplicate in string js how to check if the array contains repeated elements js make a duplicate entry based on a condition in arr ay javascript find duplicates in array Duplicates number array check if an array contains duplicate values javascript check if number repeats in array dind dublicate number in array js array of numbers ind duplicates js check if array has duplicates javascript get all duplicate elements array js check duplicates in 2 arrays js check duplicate. duplicates in array find if there is only one duplicate numberi n the array es6 how to find duplicate values in array using typescript JAVASCRIPT CHECK DUPLICATES FROM THREE AFRRAY how to check for duplicates between 2 arrays javascript how to check for duplicates in 2 arrays javascript how to check for duplicates in 2 array javascript how to count duplicates in an array javascript how to know how many times an item in array is duplicated javascript find duplicate values array javascript duplicate array js find duplicates in array typescript how to check for duplicate values in array javascript get duplicate values in array javascript find duplicate elements in array javascript find duplicate elements in array no duplicate in array duplicate array row in js find duplicate strings in array javascript typescript find duplicates in array find duplicate numbers in javascript find duplicatenumbers in javascript javascript check for duplicate entries find duplicates in array javascript es6 how to know how many repeated values in an array in js how to check if we have repeated elements in an array in node js find duplicate words in array of string javascript array duplicate javascript js duplicate row in array array get duplicates javascript duplicate array js check if has duplicates finbd duplicate numbers in array javascripz how to find and return the number of duplicates in an array in javascript how to get only duplicate values in array using javascript js array find duplicates in array of array javascript check for duplicate before adding to array how to test for duplicates in an array how to check duplicate string in array javascript check for duplicates in an array js array duplicate check find duplicate number in array duplicate value in array check if counter has duplicate values javascript Find Duplicate in Array javascript array check same value javascript check for duplicates in array no duplicates in array javascript count duplicate elements in array javascript duplicate javascript array check if there r duplicates and how many times duplicated js javascript check if array has duplicates check for duplicates in array how to know how many numbers are repeated in an array js why am i geting duplicate elements in list javascript check if the there ar a dublicate elements in the array JS how to check repeated values in array node ks how to check for duplicates in array find duplicate items in array js array check for duplicates duplicate array javascript how to count duplicate values in an array in javascript find repeated values in array javascript how to check for duplicate elements in an array check if array has duplicate values how to check if there are repeating values in an array javascript How do you find duplicate numbers in an array if it contains multiple duplicates javascript check array for duplicates how to check if the el array elements are not duplicate js if array includes duplicates javascript how to check for 3 duplicate items in array js javascript return only duplicate entries from an array how to check array repetition javascript with two for how to find same name key from javascript js filter check if value is repeted in array get non unique objects in array javascript find duplicate elements in array in javascript add non unique value too array javascript fetch only repeated elements in array javascript fetch non duplicate value in array javascript fetch nonduplicates value in array javascript fetch an element that has no duplicate value javascript fetch an element that has no duplicate check array for duplicate values javascript finding doubplicates in array javascript how to get all repeating elements of an array javascript duplicate values in javas javascript find not repetitive find duplicates in array js remember duplicate elemnts from array in javascript without using functions remember duplicate elemnts from array in javascript find repeating element the first in an array javascript and shw all see if the number is repeated in the array js find duplicates from array javascript how to solve locationsame value aaray js get values that are not repeated array javascript search same elements in js how to show same value one using js use filter to find same values in 2 arr find all duplicates in an array js find how many identicel elements in array js] how to find all the duplicate values length in array in javascript how to find all the duplicate values in array in javascript find repeated number in array javascript find all the repeats numbers in array javascript find identical value in array by name nodejs javascript duplicates in array find duplicate elements in an array javascript return list of duplicate elements in an array javascript return list of duplicate elements in an array javascript map that doesn't include duplicates js find value in array no duplicates js search through numbers no duplicates js search through numbers without counting twice how to filter the array of numbers repeated 2 times get duplicates javascript check duplicated names in array js get same value in array js javascript find the similar number in an array and index js find duplicate values in array array duplicate same values find repeating element in an array javascript javascript array check repeat javascript detecting repeating numbers in array how to check if an array has duplicate values in javascript get array with same value javascript javascript find how many duplicates in array return all same values from an array how to loop array to get duplicate values in javascript js function that sees if theres a duplicate in an array' angular find duplicate values javascript find to identical elements in array js show duplicate values only once find same value in array javascript check duplicate in complex array typescript rfind equal value in arrary es6 find equal duplicates find duplicate value with array javascript javascript not repeat data how to check duplicate elements in array javascript js find duplicate in array how to check double numbers array in javascript find a duplicate value in array by one itration in javascript find elements in list repeated twice in javascript how to check for duplicate integers in js javascript + find duplicates in an array how to select all repeated elements of an array javascript print same values in an array with index numbers js how to find non duplicates values of javascript object type script select duplicate item from tow array javascript array find duplicates ts get only once values from array no duplication javascript how to seearch for duplicate nubers in an array js fetch all similar values in array retutn an array none duplicate fidning duplicates in an array javascript create a javascript function to find duplicates in an array check duplicates in array javascript optimized get duplicate values from array javascript get same value from the array and create different array javascript nodejs get duplicate element get same number in array js donot show duplicate js finding duplicates in javascript array print repeated element in array javascript how to find folowing duplicate after each other javascript return only duplicates from an array js filter array to check for duplicate value js how to check if data is repeated in an array and filter it for single time how to find duplicate values in array in javascript js how to check for repeating index how to find the duplication times in javascript nodejs get similar entries in array how to find non duplicate items in an array using js js get all duplicates from array get all duplicates from array js get duplicate object in 2 value javascript get all duplicates js javascript find duplicate numbers in array find sismilar elements in array js filter items in js if they are non unique loop through a javascript array and find duplicates in series findduplicates javascript nodejs find duplicate elements js find duplicate value in array find duplicate in array javascript find object duplicate the most in array javascript check duplicate values in array javascript find dupliactes in array javascript get not unique elements from array js get duplicate elements in array javascript js replicate values for array js reapeated in array add to array check duplicates javascript reduce method to find duplicate letters in an aray find a dupluicate number in an array js get all same the items from an array array find duplicates and number of times js how to find duplicates in array javascript how to find more repeated element in array in javascript javascript take the same values in array javascript array indexof duplicates js search for structured duplicates in array finding duplicates with for loop javascript duplicate values in array javascript checking for duplicate content in array javascript javascript find duplicates check for duplicate items in an array get duplicate in array javascript find duplicate values in a JavaScript array. how to get how much a item is duplicated in an array js how to know how many repeated have item in javascript array javascript find in array duplicate check by key value js find duplicates in array by keys how to get new array with count of duplicate occurance of property in original arrya in agular 6 find which element is doubled js javascript get one of the same element in arrays all repeated same number array display javascript check for same value in array javascript find identical values in array javascript search array for duplicates get dupplicated on arrays javascript find duplicates array javascript get only duplicate array js js aray where values cant duplicate js array find duplicates using indexof identify duplicate elements javascript find how many duplicates values in array javascript every values repeated in same array take repeative value at once array javascript find in array with the same values javascript javascript check same value in array get duplicates in array javascript get all not unique values in array js duplicate the values in the same array javascript identify duplicate in array to access the quantity of that item js get only non-uniq value in an array in javascript javascript find array duplicates Find All Duplicates in an Array js O(n) js filter array all values that appear twice find duplicate array javascript how to check for repeated integers in an array js returns array of duplicate numbers javascript js how to know in array 2 same element check how many same values javascript array get only the value without duplicate javascript array includes string number elements how to find duplicate javascript finding to total of duplicates in an array javascript find non duplicate element in array javascript typescript find array duplicates javascript find same value in array spot duplicate set in set js indexof javascript array return all the recurring finding all duplicate elements in array js Use if condition and indexOf() to find duplicate items duplicates in array javascript loop each to find duplicate numbers in array JS var findDuplicate = function(nums) { }; find duplicate item in array javascript get same value of array javascript reduce js array get not the same elements javascript find duplicates in array es6 return the element not duplicate in javascript return the element not duplicated in javascript get duplicate name in an array find duplicate elements in array js find duplicate values in array using javascript javascript find duplicate values in array with index javascript array every find if there are duplicates how to check duplicate element in array in javascript find same values in array for loop js find duplicate numbers javascript return duplicate values of array javascript return duplicate values in array javascript given an array of integers, return only the values that have duplicates in the array arr find all non unique values make duplicate of a value javascript how to get not unique value javascript how to get duplicate values from array in javascript javascript duplicate number javascript find repeated items in array javascript find repeat items in array get duplicate number in array es6 get duplicates number in array es6 find single number in array of duplicate javascript find copies within an array find same items in array js js find dublicates in array javascript write a function that finds duplicates in an array indexof javascript write a function that finds duplicates in an array find equal elements in array javascript node check array for duplicates php get common array values avoid duplicate entry in array pyhton how to check value is an array in php select duplicate in list of string typescript duplicate number in array javascript Find a duplicate value from array to find duplicates in an array js find how many duplicates in array javascript js get duplicates in array get all duplcates js get all duplcates js check all number of duplcates js js array select duplicates extract duplicate values out of array js js find same value in array js find duplicates in array js more array find equal element ajs array find equal find duplicates function in javascript javascript duplicates within array duplicates in an array return different value js how to find all duplicate in the array js view duplicates javascript array how to find duplicate elements in an array in javascript how to check for duplicate values in javascript javascript array find element with same value find array duplicates javascript find similar values array javascript javascript find duplicates in array find matching numbers in an array javascript find duplicate item in array typescript check repetitive numbers in array javascript how to check duplicate elements in an array more than once javascript How to find duplicate elements in an array Javascript check dublicate value in list javascript duplicate numbers in array javascript return array of duplicates javascript javascript duplicates withing array how do you find the duplicate number on a given integer array javascript get elements from duplicate elements by index javascript How to get equal elements from an array in javacsript find duplicate values in array javascript find duplicates in string javascript javascript get duplicates in array how to find duplicates in an array javascript check for repaeats in an array with set javascript how to check for duplicates in array javascript find duplicates in an array javascript find duplicate number in array JS a function that returns on duplicates in array javascript javascript return repeated items from an array only once how to check for duplicate values in js check for duplicate values in array javascript find duplicate values in an array javascript find duplicate number in array javascript finding duplicates in an array javascript find duplicate javascript array find duplicates in array javascript js find duplicates find duplicate in array js

Made with love

Welcome Back!

Sign up to unlock all of IQCode features:

Test your skills and track progress
Engage in comprehensive interactive courses
Commit to daily skill-enhancing challenges
Solve practical, real-world issues
Share your insights and learnings

Create an account

Create a Free Account

Sign up to unlock all of IQCode features:

Test your skills and track progress
Engage in comprehensive interactive courses
Commit to daily skill-enhancing challenges
Solve practical, real-world issues
Share your insights and learnings

Create an account

Creating a new code example