When multiple tasks are running simultaneously, it is useful sometimes to be able to communicate data and state between them. A Channel is a Julia object that can be used to asynchronously send data from one task to another. A Channel is created by specifying the type of object it can contain, and a maximum number of elements it can hold. If no type is specified, Any is used. A maximum value of 0 implies that the channel can hold an unlimited number of values.
The following code snippet shows how to create a channel:
julia> c = Channel{Int}(10)
Channel{Int64}(sz_max:10,sz_curr:0)
A channel should be viewed as a pipe, with data entering at one end, and being consumed at the other. Values are sent to the channel using the put! function, and taken using the take! function. The put! function will block if the channel is at capacity, while the take...