JavaScript/String/CheckWordOccurrence.js

/**
 * Check and count occurrence of each word in a string
 * Inputs a String eg. Madonna and Boolean
 */

const checkWordOccurrence = (str, isCaseSensitive = false) => {
	if (typeof str != 'string') {
		throw new TypeError('The first param should be a string');
	}
	if (typeof isCaseSensitive != 'boolean') {
		throw new TypeError('The second param should be a boolean')
	}

	let result = {}
	if (str.length > 0) {
		for (let i = 0; i < str.length; i++) {
			const word = isCaseSensitive ? str[i] : str[i].toUpperCase()
			if (/\s/.test(word)) continue;
			result[word] = (!result[word]) ? 1 : result[word] + 1
		}

	}
	return result;
}
export { checkWordOccurrence }