Bug #1117: Array#choice always produces the same sequence

• Status: Closed
• Assignee: -
• ruby -v: 1.8.7-p72

[stefanocr (Stefano Crocco)]

=begin
In ruby 1.8.7-p72, Array#choice produces the same sequence of elements every time the script is run. For example:

ruby -e 'p [1,2,3,4].choice'
=> 4
ruby -e 'p [1,2,3,4].choice'
=> 4
ruby -e 'p [1,2,3,4].choice'
=> 4
ruby -e 'p [1,2,3,4].choice'
=> 4

According to the documentation, I'd expect this to give a different result every time. To achieve the result I expect, I need to call Kernel#srand before Array#choice:

ruby -e 'srand; p [1,2,3,4].choice'
=> 4
ruby -e 'p [1,2,3,4].choice'
=> 2
ruby -e 'p [1,2,3,4].choice'
=> 3
ruby -e 'p [1,2,3,4].choice'
=> 2
=end

[shyouhei (Shyouhei Urabe)]

• Status changed from Open to Closed

=begin
This issue has already been fixed in the repository.
=end

[murphy (Kornelius Kalnbach)]

=begin
Stefano Crocco wrote:

Bug #1117: Array#choice always produces the same sequence
actually, why isn't srand initialized with Time.now.to_i or just 0 by
default? we had the issue with Array#shuffle before...

[murphy]

=end

[matz (Yukihiro Matsumoto)]

=begin
Hi,

In message "Re: [ruby-core:21882] Re: [Bug #1117] Array#choice always produces the same sequence"
on Fri, 6 Feb 2009 17:36:13 +0900, Kornelius Kalnbach [e-mail] writes:

|> Bug #1117: Array#choice always produces the same sequence
|actually, why isn't srand initialized with Time.now.to_i or just 0 by
|default? we had the issue with Array#shuffle before...

Don't worry, it is now. Those two problems were fixed at the same
time.

						matz.

=end

[murphy (Kornelius Kalnbach)]

=begin
Yukihiro Matsumoto wrote:

Don't worry, it is now. Those two problems were fixed at the same
time.
I'm sorry :)

it also seems Array#choice was replaced by the nicer #sample. didn't
know that.

[murphy]

=end