NAME¶
WebCommon::incomingExists - Checks a key exists in user-supplied data
SYNOPSIS¶
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.
WebCommon.DataSource (3kaya)
WebCommon.incomingData (3kaya)
WebCommon.incomingKeys (3kaya)
WebCommon.incomingValue (3kaya)
