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In the following Python code, function calculate accepts a parameter operate that is used as a blocking callback. calculate is called with square which acts as a callback function. def square ( val ): return val ** 2 def calculate ( operate , val ): return operate ( val ) # outputs: 25 calculate ( square , 5 )
RPyC (pronounced are-pie-see), or Remote Python Call, is a Python library for remote procedure calls (RPC), as well as distributed computing. Unlike regular RPC mechanisms, such as ONC RPC, CORBA or Java RMI, RPyC is transparent, symmetric, and requires no special decoration or definition languages. Moreover, it provides programmatic access to ...
For example, if a customer from Spain is calling a phone number in Australia, and it costs 8 cents per minute to phone Spain from the US (the callback, which is an incoming call) and 20 cents per minute to phone Australia from the US (the destination call, which is an outgoing call), then the caller will pay a total of 28 US cents a minute ...
Example code now doesn't show a function with a callback in it - it presumes the readeer already has some other window open somewhere showing them the prototype for signal(), which is, I feel, not a safe assumption.
Users can set up a Skype To Go number which allows them to reach international phones numbers dialled from any landline or mobile. Skype provides a local number (the user chooses the area code) that then connects using Skype Credit to the number in another country. The service also provides the opportunity to dial any number abroad as well. [11]
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
In telecommunications, an automatic callback is a computer telephony calling feature that permits a user, when encountering a busy condition or other condition where the called individual is unavailable, to instruct the system to retain the called number and to establish the call when there is an available line or when the called number is no longer busy.
A typical use of a function object is in writing callback functions. A callback in procedural languages, such as C, may be performed by using function pointers. [2] However it can be difficult or awkward to pass a state into or out of the callback function. This restriction also inhibits more dynamic behavior of the function.