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ergo/irc/utils/types.go
2022-04-29 13:39:11 -04:00

37 lines
703 B
Go

// Copyright (c) 2020 Shivaram Lingamneni
// released under the MIT license
package utils
type empty struct{}
type HashSet[T comparable] map[T]empty
func (s HashSet[T]) Has(elem T) bool {
_, ok := s[elem]
return ok
}
func (s HashSet[T]) Add(elem T) {
s[elem] = empty{}
}
func (s HashSet[T]) Remove(elem T) {
delete(s, elem)
}
func CopyMap[K comparable, V any](input map[K]V) (result map[K]V) {
result = make(map[K]V, len(input))
for key, value := range input {
result[key] = value
}
return
}
// reverse the order of a slice in place
func ReverseSlice[T any](results []T) {
for i, j := 0, len(results)-1; i < j; i, j = i+1, j-1 {
results[i], results[j] = results[j], results[i]
}
}