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Detectar un espacio en un string
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Topic: Detectar un espacio en un string (Read 1996 times)
mav
Jr. Member
Posts: 80
Detectar un espacio en un string
«
on:
May 12, 2021, 01:41:02 am »
¿Como detectarlo? Sin que de fallos,
He probado de varias maneras y no lo encuentro,
Code: Pascal
[Select]
[+]
[-]
nombre
:
=
Edit1
.
Text
;
for
i
:
=
1
to
length
(
nombre
)
do
begin
if
(
nombre
[
i
]
in
(
' '
)
then
// o #32, $20 el in no deja utilizarlo aquí
begin
ShowMessage
(
'Tu nombre no puede tener espacios '
)
;
Exit
;
end
;
end
;
Saludos.
Logged
dseligo
Hero Member
Posts: 1221
Re: Detectar un espacio en un string
«
Reply #1 on:
May 12, 2021, 02:37:42 am »
Code: Pascal
[Select]
[+]
[-]
nombre
:
=
Edit1
.
Text
;
if
Pos
(
' '
,
nombre
)
>
0
then
begin
ShowMessage
(
'Tu nombre no puede tener espacios '
)
;
Exit
;
end
;
Logged
mav
Jr. Member
Posts: 80
Re: Detectar un espacio en un string
«
Reply #2 on:
May 12, 2021, 02:48:42 am »
Vale, funciona perfectamente.
Gracias.
Logged
lucamar
Hero Member
Posts: 4219
Re: Detectar un espacio en un string
«
Reply #3 on:
May 12, 2021, 05:00:31 am »
En caso de que lo necesites alguna vez, la sintaxix correcta para tu código original es:
Code: Pascal
[Select]
[+]
[-]
if
nombre
[
i
]
in
[
' '
]
then
con corchetes, no paréntesis, porque se trata de la pertenencia a un conjunto ("set").
Logged
Turbo Pascal 3 CP/M - Amstrad PCW 8256 (512 KB !!!)
Lazarus/FPC 2.0.8/3.0.4 & 2.0.12/3.2.0 - 32/64 bits on:
(K|L|X)Ubuntu 12..18, Windows XP, 7, 10 and various DOSes.
mav
Jr. Member
Posts: 80
Re: Detectar un espacio en un string
«
Reply #4 on:
May 12, 2021, 02:59:28 pm »
Gracias.
:)Buen "truco", si me va a servir, porque ya en mas ocasiones me ha dado error lo del
in
y
estoy viendo que como en este caso son los corchetes...
Logged
Edson
Hero Member
Posts: 1302
Re: Detectar un espacio en un string
«
Reply #5 on:
May 12, 2021, 05:19:10 pm »
Considerar que las tabulaciones son también espacios en blanco.
A lo mejor conviene más hacer una comparación de caracteres válidos, que inválidos.
Logged
Lazarus 2.2.6 - FPC 3.2.2 - x86_64-win64 on Windows 10
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