close(::Channel)
close(Channel)
Closes a channel. An exception is thrown by:
put!
on a closed channel.take!
andfetch
on an empty, closed channel.
Examples
-
Close a file stream:
julia> file = open("data.txt"); julia> close(file)
This example closes the file stream
file
after performing a flush operation. -
Close a network stream:
julia> sock = connect("localhost", 8080); julia> close(sock)
It closes the network stream
sock
after flushing any pending data. - Close a stream and handle errors:
julia> stream = open("output.txt", "w"); julia> try # Perform some operations with the stream finally close(stream) end
In this example, the
close
function is used in afinally
block to ensure that the stream is closed even if an error occurs during the operations performed with the stream.
Common mistake example:
julia> close(5)
ERROR: MethodError: no method matching close(::Int64)
In this example, the close
function is called with an argument that is not a valid stream. Make sure to pass a valid stream object to the close
function to avoid this error.
See Also
Channel, close, put!, take!,User Contributed Notes
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