Generate uuid

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

Newb N. 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/Uuid#Ruby

Lex W. wrote:

Newb N. 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/Uuid#Ruby

In Windows, you can use this code. I’m not sure where I found this
from, so I can’t tell you who to thank :stuck_out_tongue:

require ‘Win32API’

@uuid_create = Win32API.new(‘rpcrt4’, ‘UuidCreate’, ‘P’, ‘L’)

def new_guid
result = ’ ’ * 16
@uuid_create.call(result)
a, b, c, d, e, f, g, h = result.unpack(‘SSSSSSSS’)
sprintf(’{%04X%04X-%04X-%04X-%04X-%04X%04X%04X}’, a, b, c, d, e, f, g,
h)
end

puts new_guid

Cheers,
Mohit.
8/31/2008 | 2:28 PM.

2008/8/28 Newb N. [email protected]:

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

You get get UUID on the WEB like this:

require ‘open-uri’
uuid = open(‘http://www.famkruithof.net/uuid/uuidgen’).
read.scan(/

([-[:alnum:]]+)</h3>/).to_s
puts uuid

Regards,

Park H.

On Aug 31, 2008, at 6:12 PM, Heesob P. wrote:

Regards,

Park H.

One thing I;ve found is that all of the UUID generators are painfully
slow if you need to make a bunch of uuid’s. Here is a way to cheat,
but do so at your own risk as this is not garaunteed to be as safe as
a true uuid but in practice works very well.

def fast_token
  values = [
    rand(0x0010000),
    rand(0x0010000),
    rand(0x0010000),
    rand(0x0010000),
    rand(0x0010000),
    rand(0x1000000),
    rand(0x1000000),
  ]
  "%04x%04x%04x%04x%04x%06x%06x" % values
end

Cheers-
-Ezra

On Aug 28, 2008, at 2:43 AM, Newb N. wrote:

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

not mine, but here’s a copy:

http://s3.amazonaws.com/drawohara.com.ruby/uuid.rb

a @ http://codeforpeople.com/

On 1 sep 2008, at 23.48, James G. wrote:

require ‘open-uri’
painfully slow if you need to make a bunch of uuid’s.

My favorite trick is:

uuid = uuidgen.strip

It has always been fast enough for my needs.

James Edward G. II

   The variation I use is uuid = "x_#{`uuidgen`.strip}"

The advantage is that the generated uuid is always suitable as an xml ID

On Sep 1, 2008, at 14:48 , James G. 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

On Sep 1, 2008, at 4:27 PM, Ezra Z. wrote:

   read.scan(/<h3>([-[:alnum:]]+)<\/h3>/).to_s

puts uuid

Regards,

Park H.

One thing I;ve found is that all of the UUID generators are
painfully slow if you need to make a bunch of uuid’s.

My favorite trick is:

uuid = uuidgen.strip

It has always been fast enough for my needs.

James Edward G. II

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

almost all cases. thanks.
puts “# of iterations = #{max}”
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/uuid.rb

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://codeforpeople.com/

Newb N. 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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