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| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | random.c | 33 |
2 files changed, 29 insertions, 8 deletions
@@ -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> * random.c (random_s_rand, Init_Random): Random.rand should behave as @@ -1199,14 +1199,22 @@ random_equal(VALUE self, VALUE other) * call-seq: * 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 - * 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. + * + * If <i>max</i> is +Range+, returns a pseudorandom number where + * range.member(number) == true. + * + * Or else converts _max_ to an integer using max1 = + * max<code>.to_i.abs</code>. + * + * 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 * [ rand, rand ] #=> [0.191519450163469, 0.49766366626136] @@ -1235,6 +1243,15 @@ rb_f_rand(int argc, VALUE *argv, VALUE obj) return r; } +/* + * call-seq: + * Random.rand -> float + * Random.rand(limit) -> number + * + * Alias of _Random::DEFAULT.rand_. + * + */ + static VALUE random_s_rand(int argc, VALUE *argv, VALUE obj) { |