Go mailing list problem record 1

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(Go mailing list problem record 1)

How can I get a struct size?

How go gets the structure size

Encoding/binary. Size can only report the encoded size under very strict circumstances. You probably want something like unsafe. Sizeof

The reflect. Type.size () can ' t calculate slice struct.

The person here asks the structure is a common head+data structure of the message, want to send through the socket, need to get the length, but the data structure has slice.

1. It was proposed to use reflect. Type.size (), but this method does not get the slice size
2. Then you can use Encoding/binary. Size. But slice this should be a pointer? So what you get is actually a pointer that contains slice, not the size of the slice content ...

Go get CMD output in real time

How does go get the real-time output of call cmd?

https://golang.org/pkg/os/exec/#Cmd. Stdoutpipe