Flowdock
method

add_listener

Importance_1
v1_8_7_330 - Show latest stable - 0 notes - Class: Test::Unit::Util::Observable
add_listener(channel_name, listener_key=NOTHING) public

Adds the passed proc as a listener on the channel indicated by channel_name. listener_key is used to remove the listener later; if none is specified, the proc itself is used.

Whatever is used as the listener_key is returned, making it very easy to use the proc itself as the listener_key:

listener = add_listener("Channel") { ... }
remove_listener("Channel", listener)
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