Question

How to count the occurrences of each letter in char array with JavaScript

Answer 1

function countLetterOccurrences(charArray) {
    const letterCounts = {};

    charArray.forEach(char => {
        if (letterCounts[char]) {
            letterCounts[char]++;
        } else {
            letterCounts[char] = 1;
        }
    });

    return letterCounts;
}

const charArray = ['a', 'b', 'a', 'c', 'd', 'c', 'e', 'f', 'e', 'a'];

const result = countLetterOccurrences(charArray);

console.log(result); 

 
    
/*
run:

{ a: 3, b: 1, c: 2, d: 1, e: 2, f: 1 }

*/
 

 

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