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Since C++23, the C++ standard library can now be imported as a module, but must be imported in its entirety rather than importing specific packages of the library like in Java, with import std;, or optionally if requiring the C standard library in the global scope, with import std.compat;.
Import can be classified by level (module, package, class, procedure,...) and by syntax (directive name, attributes,...). File include #include < filename > or #include " filename " – C preprocessor used in conjunction with C and C++ and other development tools
COBOL defines an include directive indicated by copy in order to include a copybook. Generally, for C/C++ the include directive is used to include a header file, but can include any file. Although relatively uncommon, it is sometimes used to include a body file such as a .c file. The include directive can support encapsulation and reuse ...
Cython provides optional manual memory management by letting the user import malloc, realloc, and free from C, which they can then use in Python code. [ 18 ] D provides programmers with full control over its own garbage collector, including the ability to disable it outright.
Java: Application, business, client-side, general, mobile development, server-side, web Yes Yes Yes Yes Yes Yes Concurrent De facto standard via Java Language Specification JavaScript: Client-side, server-side, web Yes Yes Yes Yes No Yes prototype-based: Yes 1997-2022, ECMA-262: Joy: Research No No Yes No No No Stack-oriented No jq "awk for ...
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.
GCC provides #include_next for chaining headers of the same name. [13] Import. Unlike C and C++, Objective-C includes an #import directive that is like #include but results in a file being included only once – eliminating the need for include guards and #pragma once.
Sometimes classes with the same name exist in multiple namespaces or packages. Such classes can be referenced by using fully qualified names, or by importing only selected classes with different names. To do this, Java allows importing a single class (e.g., import java.util.List).