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comp.lang.ruby

generate uuid

Newb Newb

8/28/2008 8:43:00 AM

How Can I generate uuid ? any references or Ideas could You people
suggest.I have not even heard about it?
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3 Answers

Lex Williams

8/28/2008 9:58:00 AM

0

Newb Newb wrote:
> How Can I generate uuid ? any references or Ideas could You people
> suggest.I have not even heard about it?

http://en.wikipedia.org/wiki...
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ara.t.howard

9/2/2008 12:15:00 AM

0


On Sep 1, 2008, at 5:38 PM, Ryan Davis wrote:

>
> On Sep 1, 2008, at 14:48 , James Gray wrote:
>
>> My favorite trick is:
>>
>> uuid = `uuidgen`.strip
>>
>> It has always been fast enough for my needs.
>
> that's nice. 10k real uuids in 1 minute is perfectly acceptable for
> almost all cases. thanks.
>
> % ./blah.rb 10000
> # of iterations = 10000
> user system total real
> null_time 0.000000 0.000000 0.000000 ( 0.001486)
> ezra 0.200000 0.000000 0.200000 ( 0.201678)
> uuidgen 1.160000 12.630000 58.190000 ( 56.684045)
>
> ----
>
> puts "# of iterations = #{max}"
> Benchmark::bm(20) do |x|
> x.report("null_time") do
> for i in 0..max do
> # do nothing
> end
> end
>
> x.report("ezra") do
> for i in 0..max do
> fast_token
> end
> end
>
> x.report("uuidgen") do
> for i in 0..max do
> `uuidgen`.strip
> end
> end
> end
>
>


cfp:~ > cat a.rb
require 'open-uri'

uri = 'http://s3.amazonaws.com/drawohara.com.ruby/uu...

eval open(uri).read

a = Time.now.to_f

( n = 1000 ).times{ uuid = UUID.string }

b = Time.now.to_f

elapsed = b - a

puts "uuid/min : #{ n / elapsed * 60 }"



cfp:~ > ruby a.rb
uuid/min : 113947.784509223



it's kinda a POS, but with the addition of macaddr and a few other
tidbits (state using AR for instance) it's pretty dang good : 10 times
faster and pure ruby.






a @ http://codeforp...
--
we can deny everything, except that we have the possibility of being
better. simply reflect on that.
h.h. the 14th dalai lama

Ilan Berci

9/2/2008 4:06:00 PM

0

Newb Newb wrote:
> How Can I generate uuid ? any references or Ideas could You people
> suggest.I have not even heard about it?


sudo gem install guid


irb(main):001:0> require 'guid'
=> true
irb(main):002:0> Guid.new
=> b93e5a88-acf7-be64-af0b-6de00bd83fd3


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