On 05/24/2013 02:37 PM, ricardo.julio.rodriguez.fernan...@sergas.es wrote: > Hey Sergiu! A big pleasure to meet you here! Thanks for your answer. Please, > see below... > >> ________________________________________ >> From: Sergiu Dumitriu [sergiu.dumit...@gmail.com] >> Sent: 24 May 2013 19:54 >> To: user@velocity.apache.org >> Subject: Re: "addition" of lists >> >> On 05/24/2013 01:50 PM, ricardo.julio.rodriguez.fernan...@sergas.es wrote: >>> Hi! >>> >>> Probably I'll use the wrong semantic, but I'll try to explain the very >>> simple result I want >>> to get with Velocity: given two lists of results, let's me call them $list1 >>> and $list2, >>> I want to get a new list, let's call it $listTotal, including all item in >>> $list1 and $list2. >>> >>> Please, how could I do that? What is the correct expression I must it in >>> Velocity's World for his operation? >>> >>> Thank you so much for your help! >>> >>> Ricardo >>> >> >> Hey Ricardo, >> >> If those are indeed lists, they should support all the methods that >> Java's List class provides [1], including addAll [2], so this should work: >> >> #set ($listTotal = []) >> #set ($discard = $listTotal.addAll($list1)) >> #set ($discard = $listTotal.addAll($list2)) >> > > It worked! They are indeed lists :-) But I've not a clear idea yet about what > is list, what an array, what a collection, what any sort of collection... > Please, could you provide me a good reference to keep trying to understand > what I feel like a must to leverage the power of Velocity and, of course, the > nice team XWiki/Velocity? > > These two lists come from a for you well known lines of code. Something like > this... > > #set ($xwqlquery = "where doc.translation = 0 and doc.creationDate < > '2013-01-01' and doc.parent like '%$doc.title%' and doc.fullName NOT IN > ($nicestr0) order by doc.object(XWiki.XWikiUsers).last_name") > #set ($results = $services.query.xwql($xwqlquery).execute()) > > Please, is it possible to check $results if is it a list? For instance, I > guessed it is a list because I can apply size() to it. Is this a right guess?
You can always check the actual class of a variable with: $var.class This will print the classname, which will correspond to a real Java class (most likely an ArrayList). You can then look up that class in your favorite Java IDE and look at its hierarchy: which interfaces does it implement (List, Set or Map), what methods does it have, etc. One exception is that arrays (like String[]) are treated as lists by Velocity, so they will also support all the List methods, even though in Java they don't. > Thank you so much for your help! > >> >> [1] http://docs.oracle.com/javase/1.5.0/docs/api/java/util/List.html >> [2] >> http://docs.oracle.com/javase/1.5.0/docs/api/java/util/List.html#addAll%28java.util.Collection%29 > > Thanks! -- Sergiu Dumitriu http://purl.org/net/sergiu --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@velocity.apache.org For additional commands, e-mail: user-h...@velocity.apache.org
