cpt-waffle-lotide/dist/countLetters.ts

LoTide in Typescript

import { countLettersReturnInterface } from './interfaces';

const countLetters = (sentance:string):countLettersReturnInterface => {
	const result:countLettersReturnInterface = {};
	sentance.split('').forEach((letter:string) => {
		if (!result[letter]) {
			result[letter] = 0;
		}
		result[letter]++;
	});

	return result;	
};

export default countLetters;