---
name: "WebCommon.incomingValue"
section: "3kaya"
platform: "linux"
package: "kaya"
version: "0.4.4-6.2"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/WebCommon.incomingValue"
---

# WebCommon.incomingValue(3kaya)

Returns the first value for the specified key from user-supplied data

## NAME

WebCommon::incomingValue - Returns the first value for the specified key from user-supplied data

## SYNOPSIS

**String incomingValue(** *String key, DataSource ds* **)**

## ARGUMENTS

**key** The key to retrieve data for

**ds** The source for user-supplied data

## DESCRIPTION

Returns the first value for the key from the specified data source, or throws a **WebCommon.NotIncoming (3kaya)** Exception if no such key exists.

-

   // GET /example.cgi?a=1;b=3;b=5;z=;z;z\
    val = incomingData("a",DataGet);\
    // val = "1"\
    val = incomingData("b",DataGet);\
    // val = "3"\
    val = incomingData("c",DataGet);\
    // NotIncoming exception thrown\
    val = incomingData("z",DataGet);\
    // val = ""

This is generally easier to use than **WebCommon.incomingData (3kaya)** if only one value is expected for that key.

## 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.incomingExists (3kaya)**

**WebCommon.incomingKeys (3kaya)**