fix golint issues in core/collection, refine cache interface (#475)

core/collection/set.go

@@ -21,6 +21,7 @@ type Set struct {
 	tp   int
 }
 
+// NewSet returns a managed Set, can only put the values with the same type.
 func NewSet() *Set {
 	return &Set{
 		data: make(map[interface{}]lang.PlaceholderType),
@@ -28,6 +29,7 @@ func NewSet() *Set {
 	}
 }
 
+// NewUnmanagedSet returns a unmanaged Set, which can put values with different types.
 func NewUnmanagedSet() *Set {
 	return &Set{
 		data: make(map[interface{}]lang.PlaceholderType),
@@ -35,42 +37,49 @@ func NewUnmanagedSet() *Set {
 	}
 }
 
+// Add adds i into s.
 func (s *Set) Add(i ...interface{}) {
 	for _, each := range i {
 		s.add(each)
 	}
 }
 
+// AddInt adds int values ii into s.
 func (s *Set) AddInt(ii ...int) {
 	for _, each := range ii {
 		s.add(each)
 	}
 }
 
+// AddInt64 adds int64 values ii into s.
 func (s *Set) AddInt64(ii ...int64) {
 	for _, each := range ii {
 		s.add(each)
 	}
 }
 
+// AddUint adds uint values ii into s.
 func (s *Set) AddUint(ii ...uint) {
 	for _, each := range ii {
 		s.add(each)
 	}
 }
 
+// AddUint64 adds uint64 values ii into s.
 func (s *Set) AddUint64(ii ...uint64) {
 	for _, each := range ii {
 		s.add(each)
 	}
 }
 
+// AddStr adds string values ss into s.
 func (s *Set) AddStr(ss ...string) {
 	for _, each := range ss {
 		s.add(each)
 	}
 }
 
+// Contains checks if i is in s.
 func (s *Set) Contains(i interface{}) bool {
 	if len(s.data) == 0 {
 		return false
@@ -81,6 +90,7 @@ func (s *Set) Contains(i interface{}) bool {
 	return ok
 }
 
+// Keys returns the keys in s.
 func (s *Set) Keys() []interface{} {
 	var keys []interface{}
 
@@ -91,6 +101,7 @@ func (s *Set) Keys() []interface{} {
 	return keys
 }
 
+// KeysInt returns the int keys in s.
 func (s *Set) KeysInt() []int {
 	var keys []int
 
@@ -105,6 +116,7 @@ func (s *Set) KeysInt() []int {
 	return keys
 }
 
+// KeysInt64 returns int64 keys in s.
 func (s *Set) KeysInt64() []int64 {
 	var keys []int64
 
@@ -119,6 +131,7 @@ func (s *Set) KeysInt64() []int64 {
 	return keys
 }
 
+// KeysUint returns uint keys in s.
 func (s *Set) KeysUint() []uint {
 	var keys []uint
 
@@ -133,6 +146,7 @@ func (s *Set) KeysUint() []uint {
 	return keys
 }
 
+// KeysUint64 returns uint64 keys in s.
 func (s *Set) KeysUint64() []uint64 {
 	var keys []uint64
 
@@ -147,6 +161,7 @@ func (s *Set) KeysUint64() []uint64 {
 	return keys
 }
 
+// KeysStr returns string keys in s.
 func (s *Set) KeysStr() []string {
 	var keys []string
 
@@ -161,11 +176,13 @@ func (s *Set) KeysStr() []string {
 	return keys
 }
 
+// Remove removes i from s.
 func (s *Set) Remove(i interface{}) {
 	s.validate(i)
 	delete(s.data, i)
 }
 
+// Count returns the number of items in s.
 func (s *Set) Count() int {
 	return len(s.data)
 }