BoxSetIsEmpty

Test whether a Set contains no elements.

Returns true for an empty Set, false if it has one or more elements.

Method Signature

BoxSetIsEmpty(set=[set])

Arguments

Argument	Type	Required	Description	Default
set	set	true	The set to test.

Examples

Check whether a Set has no elements

s = setNew();
writeOutput( s.isEmpty() );

Result: true

isEmpty returns false for a non-empty Set

s = setOf( 1, 2 );
writeOutput( s.isEmpty() );

Result: false

Combined with clear

s = [ 1, 2 ].toSet();
before = s.isEmpty();
s.clear();
after = s.isEmpty();
writeOutput( before & "," & after );

Result: false,true

Related

• BoxSetAdd
• BoxSetAddAll
• BoxSetClear
• BoxSetContains
• BoxSetContainsAll
• BoxSetDifference
• BoxSetEach
• BoxSetEquals
• BoxSetEvery
• BoxSetFilter
• BoxSetFind
• BoxSetIntersection
• BoxSetIsDisjointFrom
• BoxSetIsSubsetOf
• BoxSetIsSupersetOf
• BoxSetMap
• BoxSetNone
• BoxSetReduce
• BoxSetReject
• BoxSetRemove
• BoxSetRemoveAll
• BoxSetRetainAll
• BoxSetSome
• BoxSetSymmetricDifference
• BoxSetToArray
• BoxSetToList
• BoxSetUnion
• ObjectToSet
• SetNew
• SetOf
• StructKeySet
• StructValueSet