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