null operator
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Null function — Not to be confused with identity function or empty function. In computer science, a null function (or null operator) is subroutine that returns no data values and leaves the program state unchanged. When it is part of the instruction set of… … Wikipedia
Null Object pattern — Null object redirects here. For the concept in category theory, see Initial object. In object oriented computer programming, a Null Object is an object with defined neutral ( null ) behavior. The Null Object design pattern describes the uses of… … Wikipedia
Null coalescing operator — The null coalescing operator (or Logical Defined Or Operator) is a binary operator that is part of the syntax for a basic conditional expression in several programming languages, including C#,[1] and Perl as of version 5.10.[2] In Scheme, boolean … Wikipedia
Null (SQL) — The Greek lowercase omega (ω) character is used to represent Null in database theory. Null is a special marker used in Structured Query Language (SQL) to indicate that a data value does not exist in the database. Introduced by the creator of the… … Wikipedia
?? Operator — The ?? operator, sometimes called the Coalescing Operator, is a binary operator that is part of the syntax for a basic conditional expression in several programming languages, most notably C#.Conditional assignment?? is most frequently used to… … Wikipedia
Null character — For other uses, see Null symbol. The null character (also null terminator), abbreviated NUL, is a control character with the value zero.[1] [2] It is present in many character sets, including ISO/IEC 646 (or ASCII), the C0 control code, the… … Wikipedia
Kernel (linear operator) — Main article: Kernel (mathematics) In linear algebra and functional analysis, the kernel of a linear operator L is the set of all operands v for which L(v) = 0. That is, if L: V → W, then where 0 denotes the null vector… … Wikipedia
Linksassoziativer Operator — Operatorassoziativität bezeichnet vor allem in der Informatik, aber auch in Mathematik und Logik: im engeren Sinn die Eigenschaft eines Operators, dass die Reihenfolge, mit der mehrere Vorkommnisse dieses Operators in einem Ausdruck ausgewertet… … Deutsch Wikipedia
Bitweiser Operator — In der Informatik ist ein bitweiser Operator ein Operator, der auf ein oder zwei Bitfolgen oder Binärzahlen auf der Ebene einzelner Bits angewendet wird. Auf vielen Computern sind bitweise Operationen etwas schneller als Additions und… … Deutsch Wikipedia
Diskreter Laplace-Operator — Der Laplace Filter bzw. diskrete Laplace Operator ist ein Filter zur Kantendetektion, der den Laplace Operator (Summe der beiden reinen zweiten Ableitungen) approximiert: Unter einer Kante versteht man nun eine Kurve, entlang derer der Gradient… … Deutsch Wikipedia
/dev/null — In Unix like operating systems, /dev/null or the null device is a special file that discards all data written to it (but reports that the write operation succeeded) and provides no data to any process that reads from it (yielding EOF immediately) … Wikipedia
