[Velocity] Foreach

[Adrien G, modificado hace 13 años.]

Hi everyone,

Something weird is happening when I use foreach loop.

I define a map in init_custom.vm like this :

#set ($headerLinks = {"Item1" : "http://www.google.com",
						"Item2" : "http://www.google.com", 
						"Item3" : "http://www.google.com",
						"Item4" : "http://www.google.com", 
						"Item5" : "http://www.google.com", 
						"Item6" : "http://www.google.com", 
						"Item7" : "http://www.google.com"})

And then, in portal_normal.vm I do this :

		<div id="bannerTop">	
			#foreach( $key in $headerLinks.keySet() )
			    <a href="$headerLinks.get($key)">$key</a>
			#end
		</div>

And in my web page I get :

 Item1 Item2 Item7  Item4 Item3 Item6  Item5 

I don't understand why items are not display in the same order... the result is the same when I change the order of items in the map.

So, how it works ? Thanks !

[charles de courval, modificado hace 13 años.]

Not so sure about this, but sets do not garantie the ordering. Try going for a list of some sort.

[Adrien G, modificado hace 13 años.]

Hi, thanks for your reply !

I tried to use entrySet() instead of keySet but it's the same issue. I don't find another solutions to browse a MapList.

            #foreach( $entry in $headerLinks.entrySet() )
                <a href="$entry.value">$entry.key</a>
                #if ($velocityCount &lt; $headerLinks.size())
                    <span>    |    </span>
                #end
            #end

Try going for a list of some sort

Could you be more precise ?

Thanks !

[charles de courval, modificado hace 13 años.]

What I wanted to say is to use some sort of list. The Map implementation does not garantie the order in which the elements were inserted in the Map. There are some exception to this, but I don't think that Velocity uses one of these classes.

[wolfgang kubens, modificado hace 13 años.]

look at this sample

#set ($menuItems= [])
#set ($tmp = $menuItems.add({"title" : "item1", "url" : "http://www.google.com"}))
#set ($tmp = $menuItems.add({"title" : "item3", "url" : "http://www.google.com"}))
#set ($tmp = $menuItems.add({"title" : "item2", "url" : "http://www.google.com"}))
#set ($tmp = $menuItems.add({"title" : "item4", "url" : "http://www.google.com"}))

#foreach ($item in $sortTool.sort($menuItems, 'title:asc'))
    <a href="$item.url">$item.title</a><br>
#end

#foreach ($item in $sortTool.sort($menuItems, 'title:desc'))
    <a href="$item.url">$item.title</a><br>
#end

[Adrien G, modificado hace 13 años.]

Thank you wolfgang, it works perfectly ;)

By the way, is there somewhere de doc reference of Velocity where I can find all objects / methods etc ? Because the user book is very restricted, for example I didn't know the existence of $sortTool function.

Have a nice day, bye !