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authorakr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2016-04-14 12:56:38 (GMT)
committerakr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2016-04-14 12:56:38 (GMT)
commitdf941c91b10d4a77631ecc85c51dc527642684b7 (patch)
tree7be4d0f57463f8f89d1f72a8ef7507aef97d8b1e /array.c
parent76426c7ea573785b8c7d3a0b4cfd15d2555741e4 (diff)
[DOC]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54578 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'array.c')
-rw-r--r--array.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/array.c b/array.c
index ca20116..d85e32c 100644
--- a/array.c
+++ b/array.c
@@ -5667,9 +5667,13 @@ rb_ary_dig(int argc, VALUE *argv, VALUE self)
* [].sum(0.0) #=> 0.0
* [1, 2, 3].sum #=> 6
* [3, 5.5].sum #=> 8.5
- * [2.5, 3.0].sum(0.0) {|v| v * v } #=> 15.25
+ * [2.5, 3.0].sum(0.0) {|e| e * e } #=> 15.25
* [Object.new].sum #=> TypeError
*
+ * The (arithmetic) mean value of an array can be obtained* as follows.
+ *
+ * mean = ary.sum(0.0) / ary.length
+ *
* This method may not respect method redefinition of "+" methods
* such as Fixnum#+.
*