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map.go
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map.go
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package util
type StringMap map[string]string
func NewStringMap() StringMap {
return make(map[string]string)
}
func (a *StringMap) Add(k, v string) bool {
if a != nil {
if _, exists := (*a)[k]; !exists {
(*a)[k] = v
return true
}
}
return false
}
func (a *StringMap) Get(k string) string {
if a == nil {
return ""
}
return (*a)[k]
}
func (a *StringMap) Contains(k string) bool {
if a == nil {
return false
}
_, exists := (*a)[k]
return exists
}
func (a *StringMap) Size() int {
if a == nil {
return 0
}
return len(*a)
}
func (a *StringMap) IsEmpty() bool {
return a == nil || len(*a) == 0
}
func (a *StringMap) Keys() []string {
var r []string
for k, _ := range *a {
r = append(r, k)
}
return r
}
func (a *StringMap) ForEach(f func(string, string) error) error {
if a != nil {
for k, v := range *a {
if err := f(k, v); err != nil {
return err
}
}
}
return nil
}