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WebCommon.incomingExists.3kaya
Langue: en
Version: March 2009 (fedora - 05/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
WebCommon::incomingExists - Checks a key exists in user-supplied dataSYNOPSIS
Bool incomingExists( String key, DataSource ds )ARGUMENTS
key The key to check
ds The source for user-supplied data
DESCRIPTION
Returns true if the key exists in the data source, and false otherwise.
// GET /example.cgi?a=1;b=3;b=5;z=;z;z
val = incomingExists("a",DataGet);
// val = true
val = incomingExists("b",DataGet);
// val = true
val = incomingExists("c",DataGet);
// val = false
val = incomingExists("z",DataGet);
// val = true
This is useful for avoiding Exceptions when using WebCommon.incomingData(3kaya) or WebCommon.incomingValue(3kaya) , or for checking if a checkbox has been selected.
AUTHORS
Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/LICENSE
The Kaya standard library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (version 2.1 or any later version) as published by the Free Software Foundation.RELATED
WebCommon.DataSource(3kaya)
WebCommon.incomingData(3kaya)
WebCommon.incomingKeys(3kaya)
WebCommon.incomingValue(3kaya)
Contenus ©2006-2024 Benjamin Poulain
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