useParameterToFilterArray

filter.js

function useParameterToFilterArray(filterFn, array) {
  const filteredArray = [];
  for (let i = 0; i < array.length; i++) {
    if (filterFn(array[i])) {
      filteredArray.push(array[i]);
    }
  }
  return filteredArray;
}

let unfilteredArray = [1, 2, 3, 4, 5, 6];

console.log(useParameterToFilterArray((el) => el > 3, unfilteredArray));