func (mm *FastIntIntMap) Keys() []int {
	if mm == nil {
		return nil
	}

	s := make([]int, 0, len(mm.m))
	for k := range mm.m {
		s = append(s, k)
	}

	return s
}
// Keys returns the keys of the current map as a slice.
Keys returns the keys of the current map as a slice.
// Keys returns the keys of the current map as a slice .
func (mm *FastIntIntMap) Keys() []int {
	if mm == nil {
		return nil
	}
	s := make([]int, 0, len(mm.m))
	for k := range mm.m {
		s = append(s, k)
	}
	return s
}
func ( mm * FastIntIntMap ) Keys ( ) [ ] int { if mm == nil { return nil } s := make ( [ ] int , 0 , len ( mm . m ) ) for k := range mm . m { s = append ( s , k ) } return s }
Keys returns the keys of the current map as a slice.
Keys returns the keys of the current map as a slice .