leftb_26r8() Function

Returns a specified number of bytes from the text, starting from the first byte.

Parameters

leftb_26r8( text, num_bytes )

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.

Returns

Text

Examples

The following example demonstrates the leftb() function.

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

leftb("boston",3) returns bos

New version details

A new version of the a!leftb() function is available starting in Appian 26.9. The new version adds an encoding parameter that lets you specify a character encoding when extracting bytes from text. This is useful when working with multi-byte character sets such as UTF-8, Shift_JIS, or GBK.

If you are using leftb_26r8(), it will continue to work as-is. To update to the new version, replace leftb_26r8() with a!leftb(). No other updates are needed.

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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