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In computer programming, a callback is a function that is stored as data (a reference) and designed to be called by another function – often back to the original abstraction layer. A function that accepts a callback parameter may be designed to call back before returning to its caller which is known as synchronous or blocking .
Some programming language implementations expose their debugging functions for use by other programs. For example, some FORTRAN dialects have an AT statement, which was originally intended to act as an instruction breakpoint. Python implements a debugger accessible from a Python program. [6]
Notice that the syntax for providing the callback to the std::sort() function is identical, but an object is passed instead of a function pointer. When invoked, the callback function is executed just as any other member function, and therefore has full access to the other members (data or functions) of the object.
The execute function, that executes the given code on the server: conn.execute("print 'hello world'") Remote operations return something called a NetProxy, which is an intermediate object that reflects any operation performed locally on it to the remote object. For example, conn.modules.sys.path is a NetProxy for the sys.path object of the server.
Instrumentation involves adding additional source code to the program at compile time to call the animator before or after each statement to halt normal execution. This functionality may be part of the runtime library , as in Python's pdb module , or it may take the form of inserting a breakpoint instruction that triggers an external debugger ...
Callback (comedy), a joke which refers to one previously told; Callback (computer programming), callable (i.e. function) that is passed as data and expected to be called by another callable. Callback (telecommunications), the telecommunications event that occurs when the originator of a call is immediately called back in a second call as a response
Washington, D.C., Mayor Muriel Bowser said Monday that she and President-elect Trump "had a great meeting to discuss our shared priorities" for his upcoming term, despite their previously ...
One can also pass a callback method to BeginAccomplish, to be invoked when the long-running method completes. It typically calls EndAccomplish to obtain the return value of the long-running method. A problem with the callback mechanism is that the callback function is naturally executed in the worker thread (rather than in the original calling ...