[Swift-user] (no subject)

[Michael Wilde]

(Erin, please use good subject lines when sending to the list, as it 
makes it easier to manage and find discussion threads)

The line:

foreach ix in frame {
    output[ix] = rotate(frame, 180);  output[ix] = rotate(frame, 180);

should be:

foreach ix,i in frame {
   output[i] = rotate(ix, 180);

or the inner statement can be:
  output[i] = rotate(frame[i], 180);

Not sure, but you might be able to use simple_mapper for input mapping 
as well. I'll leave you to experiment with that aspect for now.

- Mike


On 6/3/09 2:11 PM, Hodgess, Erin wrote:
> Hi Swift Users:
> 
> I'm trying to collect all of the files with the extension ".jpg", rotate 
> them 180 degrees, and produce output of "hoot.xxx.jpeg".
> 
> here is my swift file and my error message.  I've tried lots of things 
> with files and foreach, but I can't make any sense out of this.
> 
> Any suggestions, please?
> 
> 
> 
> [erin at tp-login2 swift1]$ cat rot2.swift
> type file;
> 
> app (file o) rotate(file s, int angle) {
>    convert "-rotate" angle @filename(s) @filename(o);
> }
> 
> file  frame[] <filesys_mapper; pattern="*.jpg">;
> file output[] <simple_mapper;suffix=".jpeg",prefix="hoot.">;
>  
> foreach ix in frame {
>   output[ix] = rotate(frame, 180);
> }  [erin at tp-login2 swift1]$
> [erin at tp-login2 swift1]$ swift -tc.file tc.data rot2.swift
> Could not start execution.
>         Compile error in foreach statement at line 10: Compile error in 
> procedure invocation at line 11: Wrong type for parameter number 0, 
> expected file, got file[]
> 
> 
> Thanks,
> Erin
> 
> Erin M. Hodgess, PhD
> Associate Professor
> Department of Computer and Mathematical Sciences
> University of Houston - Downtown
> mailto: hodgesse at uhd.edu
> 
> 
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