Lazarus
Home
Help
TinyPortal
Search
Login
Register
Lazarus
»
Forum
»
Other Languages
»
Spanish
»
Detectar un espacio en un string
Free Pascal
Website
Downloads
Wiki
Documentation
Bugtracker
Mailing List
Lazarus
Website
Downloads (Laz+FPC)
Packages (OPM)
FAQ
Wiki
Documentation (RTL/FCL/LCL)
Bugtracker
CCR Bugs
IRC channel
GIT
Mailing List
Other languages
Foundation
Website
Useful Wiki Links
Project Roadmap
Getting the Source
Screenshots
How to use the forum
About donations (wiki)
Bookstore
Computer Math and Games in Pascal
(preview)
Lazarus Handbook
Search
Advanced search
Recent
Free AI to use in local
by
BSaidus
[
Today
at 10:57:23 pm]
Ribbon bar in Lazarus 3.2...
by
lidarusa
[
Today
at 10:56:15 pm]
how to search in rxmemory...
by
rcmz
[
Today
at 10:19:54 pm]
Configure JCF messages
by
GordonFindlay
[
Today
at 10:16:19 pm]
Poll: Watches and Display...
by
Martin_fr
[
Today
at 10:15:08 pm]
Dialog ShowModal and an i...
by
d7_2_laz
[
Today
at 09:51:39 pm]
JEDI error but unit compi...
by
Thaddy
[
Today
at 09:30:33 pm]
Understanding and adjusti...
by
circular
[
Today
at 09:09:56 pm]
Controlling the behavior ...
by
wp
[
Today
at 08:29:28 pm]
Offical launch of the 1 B...
by
Gustavo 'Gus' Carreno
[
Today
at 08:21:29 pm]
how to change the color f...
by
wp
[
Today
at 07:23:58 pm]
Dynarray initialization p...
by
Thaddy
[
Today
at 06:30:12 pm]
Project fails on run but ...
by
dseligo
[
Today
at 05:30:42 pm]
Zeos components. Had to c...
by
Fantablup
[
Today
at 04:17:13 pm]
[SOLVED] Completion box s...
by
furious programming
[
Today
at 04:12:26 pm]
[LAMW] How to create a ca...
by
af0815
[
Today
at 03:48:16 pm]
Complex package installat...
by
wp
[
Today
at 03:38:16 pm]
A "leisure" question on W...
by
gidesa
[
Today
at 03:17:10 pm]
Curling Pythagoras Tree: ...
by
AlexTP
[
Today
at 03:07:53 pm]
[SOLVED] Combined pointer...
by
CM630
[
Today
at 02:48:41 pm]
Using KeyPress event, how...
by
Zvoni
[
Today
at 02:24:42 pm]
a Unit problem?
by
Thaddy
[
Today
at 01:56:12 pm]
Any upgrades to fpWeb pag...
by
marcov
[
Today
at 12:50:25 pm]
Help needed with Cairo / ...
by
Roland57
[
Today
at 12:25:16 pm]
IDE instability on Raspbe...
by
rvk
[
Today
at 10:37:14 am]
« previous
next »
Print
Pages: [
1
]
Author
Topic: Detectar un espacio en un string (Read 1955 times)
mav
Jr. Member
Posts: 79
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: 1196
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: 79
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: 79
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: 1301
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
Print
Pages: [
1
]
« previous
next »
Lazarus
»
Forum
»
Other Languages
»
Spanish
»
Detectar un espacio en un string
TinyPortal
© 2005-2018