hardPass questions

• Is the two atomic style code in sync/atomic.once.go necessary?
• How to convert a string to a byte array which is compiled with a given charset in Go?
• Is it necessary to put templates into a map for reusing in Go?
• How to use LevelDB in go?
• How to convert a rune to unicode-style-string like `\u554a` in Golang?
• Is it possible to use Go's buffered channel as a thread-safe queue?
• How to test only one benchmark function?
• How to get file length in Go?
• How to convert an int value to string in Go?

hardPass answers