a!rightb() Function

Returns a specified number of bytes from the text, starting from the last byte. The a!rightb() function works the same way as a!leftb(), but extracts bytes from the end of the text instead of the beginning.

Parameters

a!rightb( text, num_bytes, encoding )

Keyword	Type	Description
text	Text	The text from which the substring will be taken.
num_bytes	Number	The length in bytes of the subtext to extract, counting from the end of the text.
encoding	Text	The character encoding to use when counting bytes. The value must be a valid Preferred MIME Name from the IANA character sets registry. For example, UTF-8, Shift_JIS, or GBK. Default: UTF-8.

Returns

Text

Using the function

The following sections cover important details about the a!rightb() function.

Using the encoding parameter

The a!rightb() function counts bytes using the encoding specified in the encoding parameter. When working with multi-byte character sets such as UTF-8 or Shift_JIS, characters can occupy more than one byte. Specifying the correct encoding ensures the function extracts the expected substring without splitting a multi-byte character.

The encoding value must be a valid Preferred MIME Name from the IANA character sets registry. If omitted, the function uses UTF-8.

Examples

The following examples demonstrate the a!rightb() function.

To experiment with examples, copy and paste the expression into an expression rule and click TEST RULE to see the output.

a!rightb("Boston",3) returns ton

a!rightb("日本語", 4, "Shift_JIS") returns 本語

Feature compatibility

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

Feature	Compatibility	Note
Portals	Compatible
Offline Interfaces	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	Custom record fields that evaluate in real time must be configured using one or more Custom Field functions.
Process Reports	Compatible
Process Events	Compatible	Can be used to configure a process event node, such as a start event or timer event.
Process Autoscaling	Compatible	Can be used in autoscaled processes.
Event Consumer Filter Conditions	Compatible	Can be used in filter conditions.
Event Consumer Event Handlers	Compatible	Can be used in event handler expressions.

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