- Source: Instance (computer science)
In computer science, an instance is an occurrence of a software element that is based on a type definition. When created, an occurrence is said to have been instantiated, and both the creation process and the result of creation are called instantiation.
Examples
= Class instance
=A class instance is an object-oriented programming (OOP) object created from a class. Each instance of a class shares a data layout but has its own memory allocation.
= Computer instance
=A computer instance is an occurrence of a virtual machine which typically includes storage, a virtual CPU.
= Polygonal model
=A computer graphics polygonal model can be instantiated in order to be drawn several times in different locations in a scene which can improve the performance of rendering since a portion of the work needed to display each instance is reused.
= Program instance
=In a POSIX-oriented operating system, program instance refers to an executing process. It is instantiated for a program via system calls such as fork() and exec(). Each executing process is an instance of a program which it has been instantiated from.
References
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