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callback    
n. 收回

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callback
n 1: a request by the manufacturer of a defective product to
return the product (as for replacement or repair) [synonym:
{recall}, {callback}]

call-back \call-back\ n.
1. a return call, especially a telephone call.
[WordNet 1.5]

2. the recall of an employee to work after a layoff.
[WordNet 1.5]

1. A scheme used in {event-driven} programs
where the program registers a {subroutine} (a "callback
handler") to handle a certain {event}. The program does not
call the handler directly but when the event occurs, the
{run-time system} calls the handler, usually passing it
arguments to describe the event.

2. A {user authentication} scheme
used by some computers running {dial-up} services. The user
dials in to the computer and gives his {user name} and
{password}. The computer then hangs up the connection and
uses an {auto-dial} {modem} to call back to the user's
registered telephone number. Thus, if an unauthorised person
discovers a user's password, the callback will go, not to him,
but to the owner of that login who will then know that his
account is under attack.

However, some {PABXs} can be fooled into thinking that the
caller has hung up by sending them a dial tone. When the
computer tries to call out on the same line it is not actually
dialing through to the authorised user but is still connected
to the original caller.

3. {cost control callback}.

(2003-07-13)


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英文字典中文字典相关资料:


  • c# - What is a callback? - Stack Overflow
    A callback can be implemented as a delegate to a method, but you could equally say that passing an object that supports a callback method on its interface is a callback
  • What is a callback URL in relation to an API? - Stack Overflow
    The callback URL is like that return envelope You are basically saying, "I am sending you this data; once you are done with it, I am listening on this callback URL waiting your response " So the API will process the data you have sent then look at the callback to send you the response
  • How to use `setState` callback on react hooks - Stack Overflow
    If you want the setState callback to be executed with the hooks then use flag variable and give IF ELSE OR IF block inside useEffect so that when that conditions are satisfied then only that code block execute Howsoever times effect runs as dependency array changes but that IF code inside effect will execute only on that specific conditions





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