1. Bug ?
- Posted by "Graeme." <hmi at POWERUP.COM.AU>
Dec 18, 1997
-
Last edited Dec 19, 1997
When writing the recursive fill routine (see
previous post) I tested it before adding the
"on-screen" check. Actually I was using a
virtual screen located in a sequence so it was
an "in-sequence" check. I was greeted by the
"attempting to subscript out of bounds" message
endlessly scrolling up the screen. The program
did not terminate in any length of time I was
willing to wait. (it was only a 64x64 sequence)
Don't know if you'd call this a bug, but I
thought I'd let you know.
I was using EU1.5a
Graeme.
2. Re: Bug ?
Graeme writes:
> When writing the recursive fill routine (see
> previous post) I tested it before adding the
> "on-screen" check. Actually I was using a
> virtual screen located in a sequence so it was
> an "in-sequence" check. I was greeted by the
> "called from ..." message
> endlessly scrolling up the screen. The program
> did not terminate in any length of time I was
> willing to wait. (it was only a 64x64 sequence)
Sounds like you had a case of "infinite recursion".
Eventually you'll run out of memory, but before
that happens, you might have hundreds of thousands
or even a million levels of subroutine calls stacked up.
It takes a while for Euphoria to unwind the entire stack, even
though it will stop displaying messages after a
hundred levels and eventually say "skipping 1000000 levels"
or something.
On my Pentium-150 it took an extra 20 seconds after
the messages first appeared before it finally gave me
the DOS prompt.
Regards,
Rob Craig
Rapid Deployment Software
3. Bug ?
Hy,
global function remove_place(sequence s,integer m)
if m=1 then
s=s[2..length(s)]
elsif m=length(s) then
s=s[1..length(s)-1]
else
s = s[1..m-1] & s[m+1..length(s)]
end if
return s
end function
Mister Craig said that in this function there were
not special cases needed, you only needed :
global function remove_place(sequence s,integer m)
return s = s[1..m-1] & s[m+1..length(s)]
end function
I tried it,
what did I get :
ERROR! slice ends past end of sequence (4 > 3)
etc.
Bug or is R.Craig a lier, or didn't I understand
it right (as always)....
Bye,
PQ
QC
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4. Re: Bug ?
Hy,
I am being stupid again...
Sorry...
Bye,
PQ
QC
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