filter.js

const filterFunction = (list, options) => {
  switch (options.option) {
    case 'age':
      return filerByAgeRange(list, options.payload);
    case 'name':
      return filerByNames(list, options.payload);
    case 'location':
      return filterByLocation(list, options.payload);
  }
};

const filerByAgeRange = (list, payload) => {
  return list.filter((data) => {
    return data.age > payload.min && data.age < payload.max;
  });
};

const filerByNames = (list, payload) => {
  return list.filter((data) => {
    return data.name.startsWith(payload);
  });
};

const filterByLocation = (list, payload) => {
  return list.filter((data) => {
    return data.location === payload;
  });
};

module.exports = filterFunction;


/* ======= How to use ======= */
// Call the filterFunction from your main file
// filter(list, options)

// * List of an array of object
// * Options, option and payload

/* ======= Example ======= */
// 1. Filter by age range
// filterFunction(personsLkist, { option: 'age', payload: { min: 16, max: 19 } })
// 2. Filter by startName
// filterFunction(persons, { option: 'name', payload: 'D' })
// 3. Filter by location information
// filterFunction(persons, { option: 'location', payload: 'california' })