Oren Eini

aka Ayende Rahien

Oren Eini

CEO of RavenDB

a NoSQL Open Source Document Database

Get in touch with me:

oren@ravendb.net +972 52-548-6969

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RavenDB - Version 6.2 Now Live
  previous post next post  
Oct 16 2007

Pattern Matching in Boo
time to read 1 min | 37 words

Looks like it is a good thing that I picked that Erlang book, Boo just got Pattern Matching, I am looking at the code, and but for the grace of Erlang, I would be completely lost.

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Tags:
  • Boo
  previous post next post  

Comments

Duncan Godwin
17 Oct 2007
00:37 AM
Duncan Godwin

Nice! It would be really cool if return could be put on the left hand side of the match statement, which would mean match would have to evaluate the selected value.

return match e:

etc.

Markus Zywitza
17 Oct 2007
06:59 AM
Markus Zywitza

Nice, but I can't think of a use case for it...

Ayende Rahien
17 Oct 2007
07:05 AM
Ayende Rahien

Check the examples, this is a very nice way of handling selections.

Avish
17 Oct 2007
17:17 PM
Avish

As always with new bamboo-driven Boo features, I get the general "this is sweeet" feeling, but I can't really understand what's being done. I see there's some kind of pattern-matching akin to Prolog's unification (and, from what I see, somewhat like Erlang which I don't know), which is cool, but I can't understand what they are doing in there, even after having read the code. Since you've already dove into the (reflectored) code, maybe you could explain what goes on in there?

Ayende Rahien
17 Oct 2007
17:22 PM
Ayende Rahien

Basically, think of it like case on steroids.

With the exception that you can do stuff like Foo: foo and if there is a match, then foo = expr

The idea is to express selects very clearly.

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