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[Derek Parnell]

On Wed, 18 Apr 2007 12:13:39 -0400, Johnny wrote:

> Hello,
> 
> I've got a problem. I need to check if a hash key exists in a for loop like:
> 
> int [char[]] a;
> int [char[]] b;
> 
> a = { a => 1; b => 5; c=> 8 }
> b = { a => 5; b => 4; d => 3; f => 4 }
> 
> foreach (m; a.keys) {
>   if ( b[m] ) {
>    writefln("%s %s %s", m, a[m], b[m])
>   }
>   else {
>     writefln("%s %s", m, a[m])
>   }
> }
> 
> ... not "real" D but I hope you understand the code and what it should do.
> Thanks.

Try replacing "if (b[m])" with "if (m in b)".

The correct way to find out if a specific key exists in an AA is to use the
"in" syntax. 

-- 
Derek Parnell
Melbourne, Australia
"Justice for David Hicks!"
skype: derek.j.parnell