[stringtemplate-interest] formatting the last element of a list

[Nate]

Try...

    public Object trunc (Object attribute) {
        if (attribute == null) return null;
        attribute = convertAnythingIteratableToIterator(attribute);
        if (attribute instanceof Iterator) {
            Iterator it = (Iterator)attribute;
            // This is lazy. Should implement our own iterator that 
wraps the attribute instead.
            List values = new ArrayList();
            while (it.hasNext())
                values.add(it.next());
            if (values.size() > 0) values.remove(values.size() - 1);
            return values;
        }
        return null;
    }



George Berger wrote:
> I tried that build, stringtemplate-05-03-2007.15, but got the same
> result.  I poked around in the source code that came with it and found
> this in ASTExpr.java:
>
> 	/** Return all but the last element.  trunc(x)=null if x is single-valued. */
> 	public Object trunc(Object attribute) {
> 		return null; // not impl.
> 	}
>
> Looks like it's not quite all there yet.
>
> George
>
> On 5/29/07, Terence Parr <parrt at cs.usfca.edu> wrote:
>   
>> You need the latest build. 3.0 doesn't have this feature.
>>
>> http://www.stringtemplate.org/download/build
>>
>> Ter
>> On May 29, 2007, at 2:55 PM, George Berger wrote:
>>
>>     
>>>> Try trunc(list) :)
>>>>         
>>> I tried this but got nothing back.  Here's my test program:
>>>
>>>   names [$names$].
>>>
>>>   first(names) [$first(names)$].
>>>   rest(names) [$rest(names)$].
>>>
>>>   trunc(names) [$trunc(names)$].
>>>   last(names) [$last(names)$].
>>>
>>> Here's the output:
>>>
>>>   names [JoeBobAlice].
>>>
>>>   first(names) [Joe].
>>>   rest(names) [BobAlice].
>>>
>>>   trunc(names) [].
>>>   last(names) [Alice].
>>>
>>> I'm using stringtemplate-3.0.jar.  Do I need something more recent?
>>>
>>> George
>>> _______________________________________________
>>> stringtemplate-interest mailing list
>>> stringtemplate-interest at antlr.org
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>>>       
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>>
>>     
>
>
>
>