Re: else on for
- Posted by kbochert at copper.net
Aug 08, 2003
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On 7 Aug 2003 at 7:00, David Cuny wrote:
>
>
> Karl Bochert wrote:
>
> > I very much like [else], but shouldn't the sense be reversed?
> >
> > for i = 1 to length( s )
> > if s[i] = 999 then
> > break
> > end if
> > else
> > printf( "999 WAS found!!" )
> > end for
>
> I see what you mean, but no. At least, not the way Python implements it, which
>
> is where I stole it from. Think of it this way: knowing the value was found
> it the easy part. That it wasn't found is more problematic.
>
Interesting. It took a while, but I understand (and agree!).
It is distressing that it could so thoroughly mislead me at first glance.
It does seem that 'else' here has a very different behavior than the else
in if-else.
Maybe:
for i = 1 to length( s )
if s[i] = 999 then
break
end if
then
printf ("999 NOT found")
end for
would be more consistant with the other uses of else & then.
The not found clause is 'after' rather than 'otherwise'.
Karl Bochert
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<div align="left"><font face="Arial"><span style="font-size:10pt">On 7 Aug 2003
at 7:00, David Cuny wrote:</span></font></div>
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<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> ============ The Euphoria Mailing List ============
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style="font-size:10pt">> </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> Karl Bochert wrote:</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> > I very much like [else], but shouldn't the
sense be reversed?</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> ></span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> > for i = 1 to length( s
)</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> > if
s[i] = 999 then</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">>
>
break</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> > end
if</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> > else</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> >
printf( "999 WAS found!!" )</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> > end
for</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> I see what you mean, but no. At least, not the way
Python implements it, which </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> is where I stole it from. Think of it this way:
knowing the value was found </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> it the easy part. That it wasn't found is more
problematic.</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span
style="font-size:10pt">> </span></font></div>
<div align="left"><font face="Arial"><span style="font-size:10pt">Interesting.
It took a while, but I understand (and agree!).</span></font></div>
<div align="left"><font face="Arial"><span style="font-size:10pt">It is
distressing that it could so thoroughly mislead me at first
glance.</span></font></div>
<div align="left"><font face="Arial"><span style="font-size:10pt">It does seem
that 'else' here has a very different behavior than the else</span></font></div>
<div align="left"><font face="Arial"><span style="font-size:10pt">in
if-else.</span></font></div>
<div align="left"><br/>
</div>
<div align="left"><font face="Arial"><span
style="font-size:10pt">Maybe:</span></font></div>
<div align="left"><br/>
</div>
<div align="left"><font face="Arial"><span
style="font-size:10pt"> for i = 1 to length( s
)</span></font></div>
<div align="left"><font face="Arial"><span
style="font-size:10pt"> if s[i] = 999
then</span></font></div>
<div align="left"><font face="Arial"><span
style="font-size:10pt">
break</span></font></div>
<div align="left"><font face="Arial"><span
style="font-size:10pt"> end
if</span></font></div>
<div align="left"><font face="Arial"><span
style="font-size:10pt"> then</span></font></div>
<div align="left"><font face="Arial"><span
style="font-size:10pt"> printf
("999 NOT found")</span></font></div>
<div align="left"><font face="Arial"><span
style="font-size:10pt"> end for</span></font></div>
<div align="left"><br/>
</div>
<div align="left"><font face="Arial"><span style="font-size:10pt">would be more
consistant with the other uses of else & then.</span></font></div>
<div align="left"><font face="Arial"><span style="font-size:10pt">The not found
clause is 'after' rather than 'otherwise'.</span></font></div>
<div align="left"><br/>
</div>
<div align="left"><font face="Arial"><span style="font-size:10pt">Karl
Bochert</span></font></div>
<div align="left"><br/>
</div>
<div align="left"></div>
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