Hash function

[Saturnino Mateus]

Hello! I need to create a page to tracking orders, each order must have a key. How can i generate this key? Im thinking use hash, is there any good hash function without colision? Is there other way to solve it with GAE?

Regards

[Karl MacMillan]

On May 27, 2015, at 10:50 AM, Saturnino Mateus <s.nata...@gmail.com> wrote:

Hello! I need to create a page to tracking orders, each order must have a key. How can i generate this key? Im thinking use hash, is there any good hash function without colision? Is there other way to solve it with GAE?

This isn’t exactly GAE specific, but you probably want a UUID:

https://docs.oracle.com/javase/7/docs/api/java/util/UUID.html

https://docs.python.org/2/library/uuid.html

Karl

Regards

-- 
You received this message because you are subscribed to the Google Groups "Google App Engine" group.
To unsubscribe from this group and stop receiving emails from it, send an email to google-appengi...@googlegroups.com.
To post to this group, send email to google-a...@googlegroups.com.
Visit this group at http://groups.google.com/group/google-appengine.
To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/e4ed5136-9aae-47b2-a34c-5635526a541f%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Jeff Schnitzer]

Alternatively, just use the id generator. Personally I use the id generator and crockford's base32 encoding variant to generate "pretty" (that is, short enough to type or read over phone if necessary) ids for public URLs.

Jeff

To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/E6774E7B-84AF-46F0-AF2B-7BC6B43E7633%40rakkoon.com.