Md5 hash or similar in SU Ruby?

[thomthom]

I'm trying to find a hashing method similar to md5 in SU Ruby, but haven't found any.
Is there none?

Anyone got any suggestions?

It's for generating unique IDs.

[tbd]

maybe start with http://betterexplained.com/articles/the-quick-guide-to-guids/

also TIG said sometime ago about using Time.now + random

[thomthom]

I was thinking of using a timestamp + entityID. And I thought I'd try to hash it.

[thomthom]

That GUID article looks like it will do the trick.

cheers!

[thomthom]

Anyone has some info on what hashing method Ruby's String.hash uses?

I'm looking at using this: "#{e.entityID}#{Time.now.to_i}".hash - but I'm not sure if I should just skip the .hash bit.

[Dan Rathbun]

There is a md5.so in the digest library. Don't know what Ruby digests are used for. (The CHM has no info.)

[Dan Rathbun]

There was a link on the GUID article to a add-on Ruby UUID generator library.

http://raa.ruby-lang.org/project/uuid/
and th rubyforge page:
http://rubyforge.org/projects/reliable-msg/

[thomthom]

Yea, I looked at that article. It seemed to require a few modules that doesn't ship with SU.

[Ricounet]

Hello!

I know this post is really old.
But for reference purposes, I found a pure Ruby implementation of MD5 there:
http://d.hatena.ne.jp/zakinco/20091030/p1

Just copy the Purerubymd5 module in your script or a library file.
Purerubymd5.hexdigest("abc")
is then available from Sketchup Ruby.

[Dan Rathbun]

Personally I have just used a Ruby %x call using the fciv.exe command line checksum utility that I believe came with the Windows Support Tools.

fciv stands for File Checksum Integrity Verifier:
Microsoft Download: File Checksum Integrity Verifier