package flag
Uint64 defines a uint64 flag with specified name(1st parameter), default value(2nd parameter), and usage string(3rd parameter). The return value is the address of a uint64 variable that stores the value of the flag.
Golang flag.Uint64() function usage example
package main
import (
"flag"
"fmt"
"strconv"
)
func main() {
hotDataSize := flag.Uint64("hotDataSize", 0, "Hot data size in bytes. 0 disables hot data optimization")
flag.Parse()
fmt.Println(flag.Lookup("hotDataSize")) // print the Flag struct
fmt.Printf("Hot Data Size is %s\n ", strconv.FormatUint(uint64(*hotDataSize), 3))
}
Output :
&{hotDataSize Hot data size in bytes. 0 disables hot data optimization 0 0}
Hot Data Size is 0
Reference :
http://golang.org/pkg/flag/#Uint64
