Re: Wielowymiarowe sortowanie listy haszy

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Article #433

#433

From: Marcin Mielżyński
Date: Fri, 09 Feb 2007 16:16

21 lines
1632 bytes

i = 0
sort_order = ['transport', 'accommodation', 'activities', 
'extras'].inject(Hash.new(100)){|h,v|h[v] = i+=1;h}

items = [
   {:level1=>'b',:x=>'B1',:service_name=>'transport'},
   {:level1=>'c',:x=>'C1',:service_name=>'extras'},
   {:level1=>'c',:x=>'C2',:service_name=>'transport'},
   {:level1=>'a',:x=>'A1',:service_name=>'activities'},
   {:level1=>'a',:x=>'A3',:service_name=>'accommodation'},
   {:level1=>'a',:x=>'A2',:service_name=>'travel'},]

items = items.sort_by{|e|
     [e[:level1],sort_order[e[:service_name]]]
}


nie trzeba dodatkowych kluczy, pisane na kolanie także pewnie da się 
wydajniej...

lopex

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Path: mbox-mo1.pugleaf.net!news-archive.icm.edu.pl!news2.icm.edu.pl!news.onet.pl!not-for-mail
From: Marcin Mielżyński <lopx@gazeta.pl>
Newsgroups: pl.comp.lang.ruby
Subject: Re: Wielowymiarowe sortowanie listy haszy
Date: Fri, 09 Feb 2007 17:16:12 +0100
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