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counts the duplicates in an array using for loop

JavaScript Biscuit answered on May 19, 2022 Popularity 6/10 Helpfulness 4/10

answer counts the duplicates in an array using for loop

related array iteration + find duplicates

counts the duplicates in an array using for loop

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function countDuplicates(arr) {
  const counts = {};
  for (let i = 0; i < arr.length; i++) {
    let element = arr[i];
    counts[element] = (counts[element] || 0) + 1;
  }
  return counts;
}
const arr = ["1", "5", "9", "14", "5", "22", "48", "25", "22", "20", "9", "13"];
console.log(countDuplicates(arr));

Popularity 6/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: for-loop javascript using

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Contributed on May 19 2022

JavaScript Biscuit

0 Answers Avg Quality 2/10

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array iteration + find duplicates

Comment

function lonelyinteger(a: number[]): number {
   for (let item of a) {
        const items = a.filter(el => item === el)
        if (items.length === 1) {
            return item
        }
    }
}



const a:number[] = [1,2,3,4,3,2,1]

const result:number = lonelyinteger(a);
console.log(result)

Popularity 8/10 Helpfulness 2/10 Language typescript

Source: Grepper

Tags: iteration typescript find

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Contributed on Nov 13 2022

Quaint Quelea

0 Answers Avg Quality 2/10

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counts the duplicates in an array using for loop

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counts the duplicates in an array using for loop

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