func Tick func Tick(d Duration) <-chan Time Tick is a convenience wrapper for NewTicker providing access to the ticking channel only. Useful for clients that have no need to shut down the ticker. type Duration type Duration int64 A Duratio…

Constants const GOOS string = theGoos GOOS is the running program's operating system target: one of darwin, freebsd, linux, and so on. 絶対値 - Wikipedia

func Println func Println(a ...interface{}) (n int, err error) Println formats using the default formats for its operands and writes to standard output. Spaces are always added between operands and a newline is appended. It returns the num…

io https://golang.org/pkg/io/ fmt https://golang.org/pkg/fmt/ http://jxck.hatenablog.com/entry/wbpress-vol.81-go