displayvalue() Function

Function

displayvalue( value, inArray, replacement, default )

Tries to match a value in a given array with a value at the same index in a replacement array and returns either the value at the same index or a default value if the value is not found.

See also: resource()

Parameters

Keyword	Type	Description
value	Any Type	The value to search for in the array. Will cast to the type of inArray.
inArray	Any Type Array	The array to be searched.
replacement	Any Type Array	The array of replacement values.
default	Any Type	The default value to be returned if the search value is not found.

Returns

Any Type

Usage considerations

Suggested uses

It is typically used to return a text display value that corresponds to an ID value stored in a process variable and makes it easier to generate reports that show human-readable values instead of numeric IDs in process data.

You can also use it to search a CDT array and return the CDT that has a field value matching a process variable value. Do this by creating an expression similar to the following: displayvalue(pv!departmentID, pv!departments.departmentID, pv!departments, "none")

Using the value parameter

The type of the argument passed to value must match the types in the replacement array, otherwise the default value will be returned.

Using the replacement parameter

If the length of the replacement array is shorter than the inArray array, the replacement array will be repeatedly extended until it is the same length as the longer inArray array.

Using displayvalue() with arrays

This function supports expressions or process variables for arrays.

Examples

Return a priority level based on the number in an array

displayvalue(!priority,{0,1,2},{"Low","Medium","High"},"Unknown") returns High when !priority=2 and Unknown when !priority=3

Use with the resource() function to display internationalized text

In the custom_locale_en_US.properties file located in the <INSTALL_HOME>/server/_conf directory, define the following key value pairs:

• low=Low
• medium=Medium
• high=High

Define a !priority process variable of type Number and set the current locale to en_US.

displayvalue(!priority,{0,1,2},{resource("low"),resource("medium"),resource("high")},"Unknown") returns High when !priority=2 because the resource() function looked up the value corresponding to the key high.

Feature compatibility

The table below lists this function's compatibility with various features in Appian.

Feature	Compatibility	Note
Portals	Compatible
Offline Mobile	Compatible
Sync-Time Custom Record Fields	Compatible	Can be used to create a custom record field that only evaluates at sync time.
Real-Time Custom Record Fields	Incompatible
Process Reports	Compatible
Process Events	Compatible

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