1 files changed, 25 insertions, 0 deletions
diff --git a/skate/map.go b/skate/map.go
index 90d8c05..d6e37be 100644
--- a/skate/map.go
+++ b/skate/map.go
@@ -78,6 +78,31 @@ func WithPrefix(f Mapper, prefix string) Mapper {
 	}
 }
 
+// WithBestEffort will not fail on an error.
+func WithBestEffort(f Mapper) Mapper {
+	return func(p []byte) ([][]byte, error) {
+		if fields, err := f(p); err != nil {
+			return nil, nil
+		} else {
+			return fields, err
+		}
+	}
+}
+
+// WithSkipOnEmpty ignores results where the value at a given field is empty.
+func WithSkipOnEmpty(f Mapper, index int) Mapper {
+	return func(p []byte) ([][]byte, error) {
+		fields, err := f(p)
+		if err != nil {
+			return nil, err
+		}
+		if index < len(fields) && len(fields[index]) == 0 {
+			return nil, nil
+		}
+		return fields, err
+	}
+}
+
 // NameOf returns name of value, e.g. the name of a function.
 func NameOf(f interface{}) string {
 	v := reflect.ValueOf(f)