1WebCommon.incomingExists(3kayaK)aya module referenWceebCommon.incomingExists(3kaya)
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NAME

6       WebCommon::incomingExists - Checks a key exists in user-supplied data
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SYNOPSIS

9       Bool incomingExists( String key, DataSource ds )
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ARGUMENTS

12       key The key to check
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14       ds The source for user-supplied data
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DESCRIPTION

17       Returns true if the key exists in the data source, and false otherwise.
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20    // GET /example.cgi?a=1;b=3;b=5;z=;z;z
21    val = incomingExists("a",DataGet);
22    // val = true
23    val = incomingExists("b",DataGet);
24    // val = true
25    val = incomingExists("c",DataGet);
26    // val = false
27    val = incomingExists("z",DataGet);
28    // val = true
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30       This  is  useful for avoiding Exceptions when using WebCommon.incoming‐
31       Data (3kaya) or WebCommon.incomingValue (3kaya) , or for checking if  a
32       checkbox has been selected.
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AUTHORS

35       Kaya   standard  library  by  Edwin  Brady,  Chris  Morris  and  others
36       (kaya@kayalang.org). For further information see http://kayalang.org/
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LICENSE

39       The Kaya standard library is free software;  you  can  redistribute  it
40       and/or  modify  it  under  the  terms  of the GNU Lesser General Public
41       License (version 2.1 or any later version) as  published  by  the  Free
42       Software Foundation.
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45       WebCommon.DataSource (3kaya)
46       WebCommon.incomingData (3kaya)
47       WebCommon.incomingKeys (3kaya)
48       WebCommon.incomingValue (3kaya)
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52Kaya                             December 2010 WebCommon.incomingExists(3kaya)
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