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[1] The "value of a variable" is given by the corresponding mapping in the environment. [2] In languages with assignable variables, it becomes necessary to distinguish between the r-value (or contents) and the l-value (or location) of a variable. [3] In declarative (high-level) languages, values have to be referentially transparent. This means ...
L-value, L value or lvalue may refer to: In astronomy, a measure of brightness of a lunar eclipse on the Danjon scale; L-value (computer science), denoting an object to which values can be assigned; In number theory, the value of an L-function; In space physics, the value assigned to an L-shell, a particular set of planetary magnetic field lines
Plot showing field lines (which, in three dimensions would describe "shells") for L-values 1.5, 2, 3, 4 and 5 using a dipole model of the Earth's magnetic field. The L-shell, L-value, or McIlwain L-parameter (after Carl E. McIlwain) is a parameter describing a particular set of planetary magnetic field lines.
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The detailed semantics of "the" ternary operator as well as its syntax differs significantly from language to language. A top level distinction from one language to another is whether the expressions permit side effects (as in most procedural languages) and whether the language provides short-circuit evaluation semantics, whereby only the selected expression is evaluated (most standard ...
R-value or rvalue may refer to: R-value (insulation) in building engineering, the efficiency of insulation of a house; R-value (soils) in geotechnical engineering, the stability of soils and aggregates for pavement construction; R-factor (crystallography), a measure of the agreement between the crystallographic model and the diffraction data
The format can serialize PHP's primitive and compound types, and also properly serializes references. [1] The format was first introduced in PHP 4. [2] In addition to PHP, the format is also used by some third-party applications that are often integrated with PHP applications, for example by Lucene/Solr. [3]
The parameter of a move assignment operator is an rvalue reference (T&&) to type T, where T is the object that defines the move assignment operator. The move assignment operator is different than a move constructor because a move assignment operator is called on an existing object, while a move constructor is called on an object created by the ...