Re: standard for loop

Scott,

You can just use a range, such as 1...3

for (i in 1..3) { println i }
1
2
3

You can use a suitable variable in a range, too, of course, so:

foo = ['a', 'b', 'c']
for (i in 0...foo.size()) { println i }
a
b
c

If you use the '..' operator for a range, the high value of the range  
is included, whereas the '...' operator does not include it.

So, '..' with the upper bound being the collection length works like  
the usual for loop "< length" idiom.

- Ken

On Nov 29, 2004, at 11:17 PM, Scott Stirling wrote:

> Hi,
>
> Is there a Groovy idiom (with a counter) to use instead of a standard  
> 'for' loop? I need to use the counter from the loop iterations.
>
> I get this exception when I code a standard 'for' loop (i.e., for (int  
> i =0; i < foo.size(); i++):
>
> Exception in thread "main" NOT YET IMPLEMENTED: standard for loop
>         at  
> org.codehaus.groovy.syntax.parser.ASTBuilder.forStatement(ASTBuilder.ja 
> va:1026)
>         at  
> org.codehaus.groovy.syntax.parser.ASTBuilder.statement(ASTBuilder.java: 
> 773)
>         at  
> org.codehaus.groovy.syntax.parser.ASTBuilder.topLevelStatement(ASTBuild 
> er.java:327)
>         at  
> org.codehaus.groovy.syntax.parser.ASTBuilder.build(ASTBuilder.java: 
> 198)
>         at  
> org.codehaus.groovy.control.SourceUnit.convert(SourceUnit.java:339)
>
> Thank you,
> Scott Stirling
> Framingham, MA