github.com/stretchr/objx v0.1.1, github.com/stretchr/testify v1.2.2

vendor/github.com/stretchr/objx/mutations.go

@@ -2,32 +2,23 @@ package objx
 
 // Exclude returns a new Map with the keys in the specified []string
 // excluded.
-func (d Map) Exclude(exclude []string) Map {
-
+func (m Map) Exclude(exclude []string) Map {
 	excluded := make(Map)
-	for k, v := range d {
-		var shouldInclude bool = true
-		for _, toExclude := range exclude {
-			if k == toExclude {
-				shouldInclude = false
-				break
-			}
-		}
-		if shouldInclude {
+	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 := make(map[string]interface{})
+	copied := Map{}
 	for k, v := range m {
 		copied[k] = v
 	}
-	return New(copied)
+	return copied
 }
 
 // Merge blends the specified map with a copy of this map and returns the result.
@@ -38,31 +29,28 @@ func (m Map) Merge(merge Map) Map {
 	return m.Copy().MergeHere(merge)
 }
 
-// Merge blends the specified map with this map and returns the current map.
+// 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
+// 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 := make(map[string]interface{})
+	newMap := Map{}
 	for k, v := range m {
 		modifiedKey, modifiedVal := transformer(k, v)
 		newMap[modifiedKey] = modifiedVal
 	}
-	return New(newMap)
+	return newMap
 }
 
 // TransformKeys builds a new map using the specified key mapping.
@@ -71,11 +59,19 @@ func (m Map) Transform(transformer func(key string, value interface{}) (string,
 // 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
+}