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In computer programming, lazy initialization is the tactic of delaying the creation of an object, the calculation of a value, or some other expensive process until the first time it is needed.
Lloyd's algorithm starts by an initial placement of some number k of point sites in the input domain. In mesh-smoothing applications, these would be the vertices of the mesh to be smoothed; in other applications they may be placed at random or by intersecting a uniform triangular mesh of the appropriate size with the input domain.
In object-oriented programming, the iterator pattern is a design pattern in which an iterator is used to traverse a container and access the container's elements. The iterator pattern decouples algorithms from containers; in some cases, algorithms are necessarily container-specific and thus cannot be decoupled.
L4, the transport layer in the OSI model of computer communications; L4, the fourth Lagrangian point in an astronomical orbital configuration; L 4, an L p space for p=4 (sometimes called Lebesgue spaces) L-4, the fourth iteration of L-carrier, high capacity frequency division multiplex over coaxial cable used by the Bell System
In programming language theory, lazy evaluation, or call-by-need, [1] is an evaluation strategy which delays the evaluation of an expression until its value is needed (non-strict evaluation) and which avoids repeated evaluations (by the use of sharing).
In computer science, a for-loop or for loop is a control flow statement for specifying iteration. Specifically, a for-loop functions by running a section of code repeatedly until a certain condition has been satisfied. For-loops have two parts: a header and a body. The header defines the iteration and the body is the code executed once per ...
For this reason, the name L4 has been generalized and no longer refers to only Liedtke's original implementation. It now applies to the whole microkernel family including the L4 kernel interface and its different versions. L4 is widely deployed. One variant, OKL4 from Open Kernel Labs, shipped in billions of mobile devices. [3] [4]
Implicit iteration is also partially supported by C++ through the use of standard function templates, such as std::for_each(), std::copy() and std::accumulate(). When used they must be initialized with existing iterators, usually begin and end , that define the range over which iteration occurs.