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* random.c (rb_f_rand, random_s_rand): RDocs for them.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31341 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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sorah 2011-04-24 23:25:11 +00:00
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ChangeLog
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@ -1,3 +1,7 @@
Mon Apr 25 08:24:04 2011 Shota Fukumori <sorah@tubusu.net>
* random.c (rb_f_rand, random_s_rand): RDocs for them.
Mon Apr 25 07:18:00 2011 Kenta Murata <mrkn@mrkn.jp> Mon Apr 25 07:18:00 2011 Kenta Murata <mrkn@mrkn.jp>
* random.c (random_s_rand, Init_Random): Random.rand should behave as * random.c (random_s_rand, Init_Random): Random.rand should behave as

33
random.c
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@ -1199,14 +1199,22 @@ random_equal(VALUE self, VALUE other)
* call-seq: * call-seq:
* rand(max=0) -> number * rand(max=0) -> number
* *
* Converts <i>max</i> to an integer using max1 = *
* max<code>.to_i.abs</code>. If _max_ is +nil+ the result is zero, returns a * If <i>max</i> is +Range+, returns a pseudorandom number where
* pseudorandom floating point number greater than or equal to 0.0 and * range.member(number) == true.
* less than 1.0. Otherwise, returns a pseudorandom integer greater *
* than or equal to zero and less than max1. <code>Kernel::srand</code> * Or else converts _max_ to an integer using max1 =
* may be used to ensure repeatable sequences of random numbers between * max<code>.to_i.abs</code>.
* different runs of the program. Ruby currently uses a modified *
* Mersenne Twister with a period of 2**19937-1. * Then if _max_ is +nil+ the result is zero, returns a pseudorandom floating
* point number greater than or equal to 0.0 and less than 1.0.
*
* Otherwise, returns a pseudorandom integer greater than or equal to zero and
* less than max1.
*
* <code>Kernel::srand</code> may be used to ensure repeatable sequences of
* random numbers between different runs of the program. Ruby currently uses
* a modified Mersenne Twister with a period of 2**19937-1.
* *
* srand 1234 #=> 0 * srand 1234 #=> 0
* [ rand, rand ] #=> [0.191519450163469, 0.49766366626136] * [ rand, rand ] #=> [0.191519450163469, 0.49766366626136]
@ -1235,6 +1243,15 @@ rb_f_rand(int argc, VALUE *argv, VALUE obj)
return r; return r;
} }
/*
* call-seq:
* Random.rand -> float
* Random.rand(limit) -> number
*
* Alias of _Random::DEFAULT.rand_.
*
*/
static VALUE static VALUE
random_s_rand(int argc, VALUE *argv, VALUE obj) random_s_rand(int argc, VALUE *argv, VALUE obj)
{ {