> ________________________________________ > From: Sergiu Dumitriu [sergiu.dumit...@gmail.com] > Sent: 25 May 2013 18:19 > To: Velocity Users List > Subject: Re: On sorting > > On 05/25/2013 11:59 AM, ricardo.julio.rodriguez.fernan...@sergas.es wrote: >>> ________________________________________ >>> From: Sergiu Dumitriu [sergiu.dumit...@gmail.com] >>> Sent: 25 May 2013 17:49 >>> To: Velocity Users List >>> Subject: Re: On sorting >>> >>> On 05/25/2013 11:39 AM, ricardo.julio.rodriguez.fernan...@sergas.es wrote: >>>> I'm really getting mad! :-) Of course I know that the only reason for this >>>> is my lack of skills!!! Catching up... >>>> >>>> I do need some kind of security. Please, could you confirm this >>>> statement... >>>> >>>> Class SortTool can be used to sort any list of objects, but NOT a list of >>>> strings. >>> >>> Where did you get this from? It is not true, it can sort any list of >>> comparable things: >>> >>> #set ($strings = ['a', 'x', 'b', 'r', 'f']) >>> $sorttool.sort($strings) -> [a, b, f, r, x] >>> >> >> Great! It is clear my wrong interpretation of this sentence... >> >> "SortTool allows a user to sort a collection (or array, iterator, etc) on >> any arbitary set of properties exposed by the objects contained within the >> collection." >> >> It is taken from the link below. No reference to strings, it speaks only >> about objects. But it is great to be wrong! > > Yes, that is the more advanced part of the SortTool, the ability to sort > "beans" [1] by one or more of their properties. Unfortunately Strings > are not beans, so the sort methods that take a second parameter can't be > used for a simple list of strings. > > > [1] http://en.wikipedia.org/wiki/JavaBeans > >> And, in this case, how could I get a reverse/desc order? > > It's not possible using the SortTool, but in XWiki we have the > $collectionstool [2, 3] which does provide both a simple sort(List) and > a reverse(List) method, so you could do: > > #set ($discard = $collectionstool.sort($list)) > #set ($discard = $collectionstool.reverse($list)) > > Keep in mind that these two methods sort the list in place, and they > return "true" if the list could be sorted/reversed. >
I think I get this. And, as said in [1], these tools are available in XWiki since 4.0M1. Perhaps I should had been called this thread "On sorting strings" or "On sorting naked strings" or "On sorting pure strings" or anything fitting better what we dealt with? By the way, [2] is great! [1] http://extensions.xwiki.org/xwiki/bin/view/Extension/Velocity+Module#HVelocityTools [3] http://platform.xwiki.org/xwiki/bin/view/SRD/Navigation?api=collectionstool&xpage=embed Thanks! > > [2] > https://github.com/xwiki/xwiki-commons/blob/xwiki-commons-5.0/xwiki-commons-core/xwiki-commons-velocity/src/main/java/org/xwiki/velocity/tools/CollectionsTool.java > > [3] > http://platform.xwiki.org/xwiki/bin/view/SRD/Navigation?api=collectionstool&xpage=embed > >> Thanks! >> >>>> http://velocity.apache.org/tools/devel/javadoc/org/apache/velocity/tools/generic/SortTool.html >>>> >>>> Thanks! Nota: A información contida nesta mensaxe e os seus posibles documentos adxuntos é privada e confidencial e está dirixida únicamente ó seu destinatario/a. Se vostede non é o/a destinatario/a orixinal desta mensaxe, por favor elimínea. A distribución ou copia desta mensaxe non está autorizada. Nota: La información contenida en este mensaje y sus posibles documentos adjuntos es privada y confidencial y está dirigida únicamente a su destinatario/a. Si usted no es el/la destinatario/a original de este mensaje, por favor elimínelo. La distribución o copia de este mensaje no está autorizada. See more languages: http://www.sergas.es/aviso_confidencialidad.htm --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@velocity.apache.org For additional commands, e-mail: user-h...@velocity.apache.org
