map-filter.ts

export const mapFilter = <T = unknown, U = unknown>(
  arr: U[],
  condition: (item: U) => boolean,
  mapTo: (item: U) => T
): T[] => {
  const newArray: T[] = [];

  for (const item of arr) {
    if (condition(item)) {
      newArray.push(mapTo(item));
    }
  }
  return newArray;
};