typescript type of in for in code example

Example 1: typescript loop over map with value as array

myMap.forEach((value: boolean, key: string) => {
    console.log(key, value);
});

Example 2: foreach typescript

example() {
    for (let item of this.items) {
        if (true) {
            return;
        }
    }
    // Do stuff in case forEach has not returned
}