The Daily Go

Many suggest to use sync.Pool which is a fast, good implementation for temporary objects. But note that sync.Pool does not guarantee that pooled objects are retained. Quoting from its doc:

Any item stored in the Pool may be removed automatically at any time without notification. If the Pool holds the only reference when this happens, the item might be deallocated.

#Note #Pool

The Daily Go

Range and Close on Channels

A sender can close a channel to indicate that no more values will be sent. Receivers can test whether a channel has been closed by assigning a second parameter to the receive expression: after

v, ok := <-ch

ok is false if there are no more values to receive and the channel is closed.

The loop for i := range c receives values from the channel repeatedly until it is closed.

Note: Only the sender should close a channel, never the receiver. Sending on a closed channel will cause a panic.

Another note: Channels aren't like files; you don't usually need to close them. Closing is only necessary when the receiver must be told there are no more values coming, such as to terminate a range loop.

#Note #Channel

The Daily Go
timenote is a tool to take notes with timestamps.

https://github.com/sascha-andres/timenote

#Note #TimeSeries