[arrow] branch main updated: GH-35256: [Go] Add ToMap to Metadata (#35257)

[ze...@apache.org]

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zeroshade pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/arrow.git


The following commit(s) were added to refs/heads/main by this push:
     new 8601aac9ee GH-35256: [Go] Add ToMap to Metadata (#35257)
8601aac9ee is described below

commit 8601aac9ee2c35eb38d70f2fa90f8cb82c4dafc5
Author: Yevgeny Pats <ye...@gmail.com>
AuthorDate: Sat Apr 22 13:13:50 2023 -0400

    GH-35256: [Go] Add ToMap to Metadata (#35257)
    
    
    
    ### Rationale for this change
    
    ### What changes are included in this PR?
    
    ### Are these changes tested?
    
    ### Are there any user-facing changes?
    
    * Closes: #35256
    * Closes: #35256
    
    Authored-by: Yevgeny Pats <16...@users.noreply.github.com>
    Signed-off-by: Matthew Topol <zo...@gmail.com>
---
 go/arrow/schema.go      | 7 +++++++
 go/arrow/schema_test.go | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/go/arrow/schema.go b/go/arrow/schema.go
index c10530ba82..f1051dac09 100644
--- a/go/arrow/schema.go
+++ b/go/arrow/schema.go
@@ -66,6 +66,13 @@ func MetadataFrom(kv map[string]string) Metadata {
 func (md Metadata) Len() int         { return len(md.keys) }
 func (md Metadata) Keys() []string   { return md.keys }
 func (md Metadata) Values() []string { return md.values }
+func (md Metadata) ToMap() map[string]string {
+	m := make(map[string]string, len(md.keys))
+	for i := range md.keys {
+		m[md.keys[i]] = md.values[i]
+	}
+	return m
+}
 
 func (md Metadata) String() string {
 	o := new(strings.Builder)
diff --git a/go/arrow/schema_test.go b/go/arrow/schema_test.go
index 201353d128..9914d8e67a 100644
--- a/go/arrow/schema_test.go
+++ b/go/arrow/schema_test.go
@@ -22,6 +22,7 @@ import (
 	"testing"
 
 	"github.com/apache/arrow/go/v12/arrow/endian"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestMetadata(t *testing.T) {
@@ -99,6 +100,9 @@ func TestMetadata(t *testing.T) {
 			if got, want := tc.md.String(), tc.serialize; got != want {
 				t.Fatalf("invalid stringer: got=%q, want=%q", got, want)
 			}
+			if len(tc.kvs) != 0 {
+				assert.Equal(t, tc.kvs, md.ToMap())
+			}
 		})
 	}