How to count the Number of Occurrences of Specified Element in the Array in TypeScript - Step by Step Examples

How to count the Number of Occurrences of Specified Element in the Array in TypeScript ?

Answer

To count the number of occurrences of a specified element in an array in TypeScript, you can use methods like filter or loops to iterate through the array and count each occurrence.

✐ Examples

1 Count Occurrences of Element 30 in Integer Array using filter

In this example,

We create an integer array named numbers with values 10, 20, 30, 40, 30, 50.
We use the filter method to filter the elements that match element 30.
We return the length of the filtered array, which gives us the count of occurrences of element 30.

TypeScript Program

const numbers: number[] = [10, 20, 30, 40, 30, 50];
const count: number = numbers.filter(num => num === 30).length;
console.log(`Number of occurrences of element 30: ${count}`);

Output

Number of occurrences of element 30: 2

2 Count Occurrences of Element 'banana' in String Array using loop

In this example,

We create a string array named fruits with values 'apple', 'banana', 'cherry', 'banana'.
We use a loop to iterate through the array and count each occurrence of the specified element 'banana'.
We increment a counter variable each time 'banana' is found in the array.

TypeScript Program

const fruits: string[] = ['apple', 'banana', 'cherry', 'banana'];
let count: number = 0;
for (const fruit of fruits) {
    if (fruit === 'banana') {
        count++;
    }
}
console.log(`Number of occurrences of element 'banana': ${count}`);

Output

Number of occurrences of element 'banana': 2

Summary

In this tutorial, we learned How to count the Number of Occurrences of Specified Element in the Array in TypeScript language with well detailed examples.

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How to count the Number of Occurrences of Specified Element in the Array in TypeScript - Step by Step Examples

How to count the Number of Occurrences of Specified Element in the Array in TypeScript ?

Answer

✐ Examples

1 Count Occurrences of Element 30 in Integer Array using filter

TypeScript Program

Output

2 Count Occurrences of Element 'banana' in String Array using loop

TypeScript Program

Output

Summary

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