Comments on: Erlang: ETS Matching with Guards (select/2) http://www.rustyrazorblade.com/2008/10/ets-matching-with-guards-select2/ Tech Thoughts, Mostly on LAMP - by Jon Haddad Fri, 03 Sep 2010 03:50:22 -0700 http://wordpress.org/?v=2.8.4 hourly 1 By: Ulf Wiger http://www.rustyrazorblade.com/2008/10/ets-matching-with-guards-select2/comment-page-1/#comment-30098 Ulf Wiger Thu, 16 Oct 2008 21:47:34 +0000 http://www.rustyrazorblade.com/?p=269#comment-30098 Also check out the man page for ms_transform (in stdlib), <a href="http://www.erlang.org/doc/man/ms_transform.html" rel="nofollow">here</a>. It allows you to write select patterns in a much nicer syntax. For your example: Eshell V5.6.4 (abort with ^G) 1> ets:fun2ms(fun({_,X}=Obj) when X > 0 -> Obj end). [{{'_','$1'},[{'>','$1',0}],['$_']}] Also check out the man page for ms_transform (in stdlib), here.

It allows you to write select patterns in a much nicer syntax. For your example:

Eshell V5.6.4 (abort with ^G)
1> ets:fun2ms(fun({_,X}=Obj) when X > 0 -> Obj end).
[{{'_','$1'},[{'>','$1',0}],['$_']}]

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