function countWordOccurrences(str: string): { [key: string]: number } {
// Convert the string to lowercase and split it into words
const words: RegExpMatchArray | null = str.toLowerCase().match(/\b\w+\b/g);
// Create an object to store word counts
const wordCounts: { [key: string]: number } = {};
if (words) {
// Iterate over each word and count occurrences
words.forEach((word) => {
wordCounts[word] = (wordCounts[word] || 0) + 1;
});
}
return wordCounts;
}
const str: string =
"TypeScript (TS) is a free and open-source high-level " +
"programming language developed by Microsoft that adds " +
"static typing with optional type annotations to JavaScript. " +
"It is designed for the development of large applications " +
"and transpiles to JavaScript";
const wordOccurrences = countWordOccurrences(str);
console.log(wordOccurrences);
/*
run:
{
"typescript": 1,
"ts": 1,
"is": 2,
"a": 1,
"free": 1,
"and": 2,
"open": 1,
"source": 1,
"high": 1,
"level": 1,
"programming": 1,
"language": 1,
"developed": 1,
"by": 1,
"microsoft": 1,
"that": 1,
"adds": 1,
"static": 1,
"typing": 1,
"with": 1,
"optional": 1,
"type": 1,
"annotations": 1,
"to": 2,
"javascript": 2,
"it": 1,
"designed": 1,
"for": 1,
"the": 1,
"development": 1,
"of": 1,
"large": 1,
"applications": 1,
"transpiles": 1
}
*/
