The keyword "nil" denotes a special value that indicates that a variable
has no value. Note that we refer both to the value and the value type as
nil. Variables that are declared without an initial value are
initialized to the nil value.
$a = Nil + 1
PRINT $a
1
$b = "Hello"
$c = " World!"
$d = Nil
$a = $b + $d + $c
PRINT $a
Hello World!
PRINT $d.getConceptType
Nil
Methods inherited from: Concept
| cloneConcept, extendsConcept, fromXML, getAllInheritedConcepts, getConceptAttribute, getConceptAttributeField, getConceptAttributeFields, getConceptAttributes, getConceptConstructors, getConceptElement, getConceptElementField, getConceptElementFields, getConceptElements, getConceptLabel, getConceptMethod, getConceptMethods, getConceptOperators, getConceptType, getErrorHandler, getInheritedConcepts, getResourceURI, hasConceptAttribute, hasConceptElement, hasConceptMethod, hasPath, isHidden, loadContent, setConceptLabel, setErrorHandler, setHidden, setShowEmpty, showEmpty, toTXT, toXML, setResourceURI |
|
| Parameters: |
| $value : | To this will be compared this concept. |
|
Returns true if this concept equals with parameter or false otherwise.
| Parameters: |
| $value : | The concept to which will be added |
|
Adds the nil concept to the concept given in parameter.
