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authorshugo <shugo@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2012-03-19 06:41:02 +0000
committershugo <shugo@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2012-03-19 06:41:02 +0000
commit831898bd9971ec5997267226417ce0ce6f76ecd7 (patch)
tree164c3b4e8b5c6427965d336e242571c4d586ff51 /enumerator.c
parent0d1c2268a81268e0026230d4d55cf73931665fcd (diff)
downloadruby-831898bd9971ec5997267226417ce0ce6f76ecd7.tar.gz
* enumerator.c (enumerable_lazy): add an example of take and first
to the documentation. [ruby-core:43344] [Bug #6158] add the description of the behavior when a block is given to zip or cycle. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35090 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'enumerator.c')
-rw-r--r--enumerator.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/enumerator.c b/enumerator.c
index a83f3ca61e..9484f495cc 100644
--- a/enumerator.c
+++ b/enumerator.c
@@ -1244,7 +1244,8 @@ lazy_initialize(int argc, VALUE *argv, VALUE self)
* Returns a lazy enumerator, whose methods map/collect,
* flat_map/collect_concat, select/find_all, reject, grep, zip, take,
* take_while, drop, drop_while, and cycle enumerate values only on an
- * as-needed basis.
+ * as-needed basis. However, if a block is given to zip or cycle, values
+ * are enumerated immediately.
*
* === Example
*
@@ -1262,7 +1263,8 @@ lazy_initialize(int argc, VALUE *argv, VALUE self)
* }
* end
* # show first ten pythagorean triples
- * p pythagorean_triples.take(10).force
+ * p pythagorean_triples.take(10).force # take is lazy, so force is needed
+ * p pythagorean_triples.first(10) # first is eager
* # show pythagorean triples less than 100
* p pythagorean_triples.take_while { |*, z| z < 100 }.force
*/