Checks a key exists in user-supplied data
Bool incomingExists( String key, DataSource ds )
key The key to check
ds The source for user-supplied data
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.
Kaya standard library by Edwin Brady, Chris Morris and others ([email protected]). For further information see http://kayalang.org/
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)