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[DOC] Add documentation for Random.rand and Random.seed

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Chris AtLee 2021-11-09 09:57:23 -05:00 committed by Nobuyoshi Nakada
parent 12ad53f41f
commit 1dd10e1892
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Notes: git 2021-12-20 01:01:39 +09:00 
Merged: https://github.com/ruby/ruby/pull/5098
1 changed files with 18 additions and 3 deletions
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21
random.c
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@ -1293,6 +1293,21 @@ random_s_bytes(VALUE obj, VALUE len)
return rand_bytes(&random_mt_if, rnd, NUM2LONG(rb_to_int(len)));
}
/*
* call-seq: Random.seed -> integer
*
* Returns the seed value used to initialize the Ruby system PRNG.
* This may be used to initialize another generator with the same
* state at a later time, causing it to produce the same sequence of
* numbers.
*
* Random.seed #=> 1234
* prng1 = Random.new(Random.seed)
* prng1.seed #=> 1234
* prng1.rand(100) #=> 47
* Random.seed #=> 1234
* Random.rand(100) #=> 47
*/
static VALUE
random_s_seed(VALUE obj)
{
@ -1646,10 +1661,10 @@ rb_f_rand(int argc, VALUE *argv, VALUE obj)
* Random.rand(max) -> number
* Random.rand(range) -> number
*
* Generates a random number by the default PRNG.
* See Random#rand.
* Returns a random number using the Ruby system PRNG.
*
* See also Random#rand.
*/
static VALUE
random_s_rand(int argc, VALUE *argv, VALUE obj)
{