occurenceOfCharacters.js

export function occurenceOfCharacters (string) {
    const map = new Map()
    for (let i = 0; i < string.length; i++) {
        const char = string[i]
        if (!map.get(char)) {
            map.set(char, 1)
        } else {
            const currentCount = map.get(char)
            map.set(char, currentCount + 1)
        }
    }

    return map
}