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 ([email protected]). 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)