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package objx
// Exclude returns a new Map with the keys in the specified []string
// excluded.
func (m Map) Exclude(exclude []string) Map {
excluded := make(Map)
for k, v := range m {
if !contains(exclude, k) {
excluded[k] = v
}
}
return excluded
}
// Copy creates a shallow copy of the Obj.
func (m Map) Copy() Map {
copied := Map{}
for k, v := range m {
copied[k] = v
}
return copied
}
// Merge blends the specified map with a copy of this map and returns the result.
//
// Keys that appear in both will be selected from the specified map.
// This method requires that the wrapped object be a map[string]interface{}
func (m Map) Merge(merge Map) Map {
return m.Copy().MergeHere(merge)
}
// MergeHere blends the specified map with this map and returns the current map.
//
// Keys that appear in both will be selected from the specified map. The original map
// will be modified. This method requires that
// the wrapped object be a map[string]interface{}
func (m Map) MergeHere(merge Map) Map {
for k, v := range merge {
m[k] = v
}
return m
}
// Transform builds a new Obj giving the transformer a chance
// to change the keys and values as it goes. This method requires that
// the wrapped object be a map[string]interface{}
func (m Map) Transform(transformer func(key string, value interface{}) (string, interface{})) Map {
newMap := Map{}
for k, v := range m {
modifiedKey, modifiedVal := transformer(k, v)
newMap[modifiedKey] = modifiedVal
}
return newMap
}
// TransformKeys builds a new map using the specified key mapping.
//
// Unspecified keys will be unaltered.
// This method requires that the wrapped object be a map[string]interface{}
func (m Map) TransformKeys(mapping map[string]string) Map {
return m.Transform(func(key string, value interface{}) (string, interface{}) {
if newKey, ok := mapping[key]; ok {
return newKey, value
}
return key, value
})
}
// Checks if a string slice contains a string
func contains(s []string, e string) bool {
for _, a := range s {
if a == e {
return true
}
}
return false
}
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