Syntax

	$expr.isEmpty()

Description

Checks if the evaluation of expr is an empty string, an empty set or null.

Parameter

Name	Type	Description	Mandatory	Default
expr	String/set	The expression for which to check whether it is empty or null.	yes

Return value

Type: Boolean

true, if expr is empty or null.

Examples

Empty set

	[].isEmpty()

Output: true

Empty string

	"".isEmpty()

Output: true

Non-empty set

	[0, 1].isEmpty()

Output: false

null

	null.isEmpty()

Output: true