package util

import (
	"encoding/gob"
	"os"
)

func Filter[T any](vs []T, f func(T) bool) []T {
	filtered := make([]T, 0)
	for _, v := range vs {
		if f(v) {
			filtered = append(filtered, v)
		}
	}
	return filtered
}

func WriteGob(filePath string, object interface{}) error {
	file, err := os.Create(filePath)
	if err == nil {
		encoder := gob.NewEncoder(file)
		err = encoder.Encode(object)
	}
	file.Close()
	return err
}

func ReadGob(filePath string, object interface{}) error {
	file, err := os.Open(filePath)
	if err == nil {
		decoder := gob.NewDecoder(file)
		err = decoder.Decode(object)
	}
	file.Close()
	return err
}