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-rw-r--r--ChangeLog6
-rw-r--r--array.c4
2 files changed, 10 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 5f8759ba3d..2669167b7f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sat Mar 7 09:36:05 2015 SHIBATA Hiroshi <shibata.hiroshi@gmail.com>
+
+ * array.c: document that first element is kept when using
+ Array#uniq and #uniq! [fix GH-845][ci skip]
+ Patch by @riffraff
+
Sat Mar 7 09:28:02 2015 SHIBATA Hiroshi <shibata.hiroshi@gmail.com>
* thread.c: Mutex#owned? is no longer experimental since 2.1.0
diff --git a/array.c b/array.c
index c02ee57132..0988a21888 100644
--- a/array.c
+++ b/array.c
@@ -4181,6 +4181,8 @@ push_value(st_data_t key, st_data_t val, st_data_t ary)
*
* It compares values using their #hash and #eql? methods for efficiency.
*
+ * +self+ is traversed in order, and the first occurrence is kept.
+ *
* Returns +nil+ if no changes are made (that is, no duplicates are found).
*
* a = [ "a", "a", "b", "b", "c" ]
@@ -4236,6 +4238,8 @@ rb_ary_uniq_bang(VALUE ary)
*
* It compares values using their #hash and #eql? methods for efficiency.
*
+ * +self+ is traversed in order, and the first occurrence is kept.
+ *
* a = [ "a", "a", "b", "b", "c" ]
* a.uniq # => ["a", "b", "c"]
*