Beefy Boxes and Bandwidth Generously Provided by pair Networks
Come for the quick hacks, stay for the epiphanies.
 
PerlMonks  

Re: Trying to Understand Callback(s)

by ikegami (Patriarch)
on Nov 23, 2017 at 22:53 UTC ( [id://1204174]=note: print w/replies, xml ) Need Help??


in reply to Trying to Understand Callback(s)

\&get_callback doesn't call get_callback; it returns a reference to it. This reference will be used by get to invoke the sub at a later time (e.g. when the request succeeds or fails). When get invokes it, it will pass parameters to it.

sub get { my ($ua, $url, $cb) = @_; ... $cb->($foo, $tx); # Call the referenced sub. ... }

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://1204174]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others pondering the Monastery: (6)
As of 2024-04-19 11:36 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found