7 examples of 'count duplicate elements in array javascript' in JavaScript

Every line of 'count duplicate elements in array javascript' code snippets is scanned for vulnerabilities by our powerful machine learning engine that combs millions of open source libraries, ensuring your JavaScript code is secure.

All examples are scanned by Snyk Code

By copying the Snyk Code Snippets you agree to
this disclaimer
64function duplicateArray(array) {
65 return array.clone ? array.clone() : new Array(array.length);
66}
Important

Use secure code every time

Secure your code as it's written. Use Snyk Code to scan source code in minutes – no build needed – and fix issues immediately. Enable Snyk Code

30function duplicateArray(arr) {
31 var newArr = [];
32 for(var i=0, arrSize=arr.length; i<arrSize; i++) {
33 newArr.push(arr[i]);
34 }
35 return newArr;
36}
1function countDuplicateArgs() {
2 const memo = {};
3 let areDuplicates = false;
4 Object.values(arguments).forEach((n) => {
5 if (!(n in memo)) memo[n] = 1;
6 else areDuplicates = true;
7 });
8 return areDuplicates;
9}
70function getCountOfDuplicates(changes: Change[]): CountOfDuplicateChanges {
71 return ArrayUtils.countDuplicates(
72 changes,
73 change => [change.type, change.action, change.name]
74 ) as CountOfDuplicateChanges;
75}
1function count_same_elements(collection) {
2 return collection
3}
52function horribleDuplicates (array) {
53 for (var i = 0; i < array.length; i++) {
54 for (var j = 0; j < array.length; j++) {
55 if (array[i] == array[j]) {
56 return true
57 }
58 }
59 }
60 return false
61}
270export function getDuplicateNames(indexableArray: { name: string }[]): string[] {
271 const seen: { [name: string]: number } = {};
272 const duplicates: string[] = [];
273
274 indexableArray.forEach((element: { name: string }) => {
275 const { name } = element;
276 const count = seen[name] || 0;
277
278 if (count === 1) {
279 duplicates.push(name);
280 }
281 seen[name] = count + 1;
282 });
283 return duplicates;
284}

Related snippets