Boolean datatype - Wikipedia, the free encyclopedia
. any operand of a 4GL Boolean comparison or is NULL, then the value of the . operator, this 4GL Boolean expression returns TRUE if the operand is not NULL. . ->
Null (SQL) - Wikipedia, the free encyclopedia
. Boolean object representing the value true if the string argument is not null . not null and is a Boolean object that represents the same boolean value . ->
NULL in expressions
NULL in boolean expressions. We've already seen that not(NULL) yields NULL. . boolean results discussed above - the following expressions all resolve to NULL: . ->
Boolean Algebra and Digital Logic
It wasn't until years later that Boolean algebra was applied to computing . how Boolean logic affects . The Null Law states that any Boolean variable . ->
CLHS: Function NULL
Function NULL. Syntax: null object => boolean. Arguments and Values: object---an object. . NOT-AND-NULL-RETURN-VALUE:X3J13-MAR-93. Copyright 1996-2005, . ->
mx.controls.treeClasses.DefaultDataDescriptor (Flex 3.3)
addChildAt(parent:Object, newChild:Object, index:int, model:Object = null):Boolean . hasChildren(node:Object, model:Object = null):Boolean . ->
mx.automation.IAutomationObjectHelper (Flex 3.3)
recording : Boolean . addSynchronization(isComplete:Function, target:Object = null):void . replayClick(to:IEventDispatcher, sourceEvent:MouseEvent = null):Boolean . ->
Null Values
No two null values are equal. . an AND operator to two Boolean operands. . Boolean expression to which the IS NULL operator is applied. Evaluates to . ->
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