要构造的字符串数组

Question

This is the command that i execute

$ ps -e
  PID    PPID    PGID     WINPID   TTY         UID    STIME COMMAND
 4372       1    4372       4372  ?         197608 03:44:57 /usr/bin/mintty
 6476    4372    6476       6208  pty0      197608 03:44:58 /usr/bin/bash
14484    6476   14484      12888  pty0      197608 13:23:48 /usr/bin/ps

I get 1d array of strings using bufio scanner.scanLines. I need to convert this into array of structs:

type ProcessInfo struct {
    PID string `json:"PID"`
    PPID string `json:"PPID"`
    PGID string `json:"PGID"`
    WINPID string    `json:"WINPID"`
    TTY   string `json:"TTY"`
    UID string `json:"UID"`
    STIME string `json:"STIME"`
    COMMAND string `json:"COMMAND"`
}

Any help would be appreciated.

Answer 1

There is a handy strings.Fields function in strings package that helps to parse this kind of output. Go likes pragmatic approaches, so the naive implementation would be:

• iterate over your array and split each line into fields with whitespace as separator
• construct new ProcessInfo object from these fields
• add this object to the array

Assuming your array is named lines, just do something like this:

var pinfos []ProcessInfo
for _, line := range lines {
    fields := strings.Fields(line)

    pi := ProcessInfo{
        PID:     fields[0],
        PPID:    fields[1],
        PGID:    fields[2],
        WINPID:  fields[3],
        TTY:     fields[4],
        UID:     fields[5],
        STIME:   fields[6],
        COMMAND: fields[7],
    }

    pinfos = append(pinfos, pi)
}

See the whole code here: https://play.golang.org/p/wo8FFiYabA