1. if statement with sequences
thanx for solving my last problem. this works now. but here comes my
next one:
sequence s
s = {"o", 3}
i want to check if there's an o, so i had this
if s[1] = "o" then do whatever
it doesn't work, i tried changing it to
if s[1] = 'o' then do whatever
if s[1] = 111 then do whatever
but it still doesn't work. i always get the error "true/false
condition must be an ATOM".
what to do?
thanx
felix
2. Re: if statement with sequences
On 1 Feb 2001, at 9:45, felix geiger wrote:
> thanx for solving my last problem. this works now. but here comes my
> next one:
>
> sequence s
> s = {"o", 3}
>
> i want to check if there's an o, so i had this
>
> if s[1] = "o" then do whatever
>
> it doesn't work, i tried changing it to
>
> if s[1] = 'o' then do whatever
> if s[1] = 111 then do whatever
>
> but it still doesn't work. i always get the error "true/false
> condition must be an ATOM".
>
> what to do?
Ask Robert to fix this bug? The beauty of an interpreted language is that it is
easier to
provide for exceptions to the existing behavior, and this is a great example. If
the
program syntax is a comparison, return a atomic byte value. Simple, no? I said
byte
value because it's an atom, and Pascal allowed for "fuzzy" true/false values.
Kat
3. Re: if statement with sequences
when comparing sequences, use compare() or equal().
- Colin Taylor
----- Original Message -----
From: felix geiger <felix.geiger at GMX.CH>
> if s[1] = "o" then do whatever
>
> it doesn't work
4. Re: if statement with sequences
> > sequence s
> > s = {"o", 3}
> >
> > i want to check if there's an o, so i had this
> >
> > if s[1] = "o" then do whatever
> >
> > it doesn't work, i tried changing it to
> >
> > if s[1] = 'o' then do whatever
> > if s[1] = 111 then do whatever
sequence s
-- your case:
s = {"o", 3}
if compare(s[1],"o") then -- note: "0" is a sequence,
? s[1] -- so is s[1]. look at compare().
else
? "not eaual!"
end if
-- but note the following case:
s = {'o', 3} -- 'o' an integer which
-- represents char. 'o'
if s[1] = 'o' then
? s[1]
else
? "not eaual!"
end if
Have a nice day, Rolf
