Question

我有一条消息流进入Go频道，其中大部分都是：

T: added package to graph: acl-devel/2.2.52_4/armv6l-musl T: added package to graph: rofs-filtered/1.7_1/x86_64-musl T: added package to graph: rofs-filtered/1.7_1/HOST T: added package to graph: libshout/2.4.1_1/i686 T: added package to graph: mate-terminal/1.18.1_1/armv6l T: added package to graph: bullet-devel/2.86.1_1/x86_64-musl T: added package to graph: bullet-devel/2.86.1_1/HOST T: added package to graph: cubietruck-uboot/2016.11_1/armv6l-musl T: added package to graph: libfontenc/1.1.3_1/i686-musl T: added package to graph: apk-tools/2.8.1_1/x86_64 T: added package to graph: virtualbox-ose/5.1.28_1/armv7l-musl T: added package to graph: acl-devel/2.2.52_4/armv7l T: added package to graph: apk-tools/2.8.1_1/x86_64-musl T: added package to graph: tzutils/2017c_1/x86_64-musl T: added package to graph: python-argh/0.26.2_1/noarch T: added package to graph: tzutils/2017c_1/HOST

我希望能够有效地将上述字符串逐行组合，但不会丢失任何信息。这是为了打印到IRC频道，所以我不想触发洪水警告。要做到这一点，我想按摩以上类似于下面的内容：

T: added package to graph: rofs-filtered/1.7_1/{x86_64-musl,HOST} T: added package to graph: libshout/2.4.1_1/i686 T: added package to graph: mate-terminal/1.18.1_1/armv6l T: added package to graph: bullet-devel/2.86.1_1/{x86_64-musl,HOST} T: added package to graph: cubietruck-uboot/2016.11_1/armv6l-musl T: added package to graph: libfontenc/1.1.3_1/i686-musl T: added package to graph: apk-tools/2.8.1_1/{x86_64,x86_64-musl} T: added package to graph: virtualbox-ose/5.1.28_1/armv7l-musl T: added package to graph: acl-devel/2.2.52_4/{armv6l-musl,armv7l} T: added package to graph: tzutils/2017c_1/{x86_64-musl,HOST} T: added package to graph: python-argh/0.26.2_1/noarch

虽然仍然有很多输出和消息，但报告的大部分是大约10-12行，上面有公共前缀，其中散布着执行上述操作的多个线程的输出（因此上述数据中的重复次数较少），许多线程和数据是约2秒的快照。

如何在Go中压缩多行以加入它们的公共前缀？

Answer 1

这是一个可能的解决方案。如果需要，可以在append（）命令之前检查重复项。

https://play.golang.org/p/XodCgl1fa5

package main

import (
    "bufio"
    "fmt"
    "strings"
)

func main() {
    input := `T: added package to graph: acl-devel/2.2.52_4/armv6l-musl
T: added package to graph: rofs-filtered/1.7_1/x86_64-musl
T: added package to graph: rofs-filtered/1.7_1/HOST
T: added package to graph: libshout/2.4.1_1/i686
T: added package to graph: mate-terminal/1.18.1_1/armv6l
T: added package to graph: bullet-devel/2.86.1_1/x86_64-musl
T: added package to graph: bullet-devel/2.86.1_1/HOST
T: added package to graph: cubietruck-uboot/2016.11_1/armv6l-musl`

    m := make(map[string][]string)
    s := bufio.NewScanner(strings.NewReader(input))
    for s.Scan() {
        t := s.Text()
        i := strings.LastIndex(t, "/")
        p := t[:i+1]
        last := t[i+1 : len(t)]
        m[p] = append(m[p], last)
    }
    for k, v := range m {
        fmt.Print(k, "{", strings.Join(v, ","), "}", "\n")
    }
}

组合公共前缀子串

1 个答案: