- Empty [null] string
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Краткий толковый словарь по полиграфии. 2010.
Empty [null] string
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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 — may refer to: Contents 1 In computing 2 In art 3 In mathematics 4 In science 5 People … Wikipedia
Null (computer programming) — Null has several meanings in computer programming.;Null pointer or null reference * Null is a special pointer value (or other kind of object reference) used to signify that a pointer intentionally does not point to (or refer to) an object. Such a … Wikipedia
Empty string — In computer science and formal language theory, the empty string (or null string)[1] is the unique string of length zero. It is denoted with λ or sometimes Λ or ε. The empty string is distinct from a null reference in that in an object oriented… … 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
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 symbol — may refer to: Null character, U+0000 ␀, U+2400 symbol for null , a single character glyph NUL Null sign ∅ for the empty set Null (SQL) ω in database theory λ, Λ, or ε, for the empty string See also Null (disambiguation) … Wikipedia
String (computer science) — In formal languages, which are used in mathematical logic and theoretical computer science, a string is a finite sequence of symbols that are chosen from a set or alphabet. In computer programming, a string is traditionally a sequence 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 morpheme — In morpheme based morphology, a null morpheme is a morpheme that is realized by a phonologically null affix (an empty string of phonological segments). In simpler terms, a null morpheme is an invisible affix. It is also called a zero morpheme;… … Wikipedia
