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init

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Stephen McQuay 2 years ago
commit
c7ca05f2fb
Signed by: sm GPG Key ID: 4E4B72F479BA3CE5
3 changed files with 62 additions and 0 deletions
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      LICENSE
  2. +3
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      README.md
  3. +39
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      main.go

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LICENSE View File

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MIT License
Copyright (c) 2018 Stephen McQuay
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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README.md View File

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# ipsort
Numerically sort lines containing ip addresses.

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main.go View File

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// command svsort sorts lines of text by semver at beginning of line
package main
import (
"bufio"
"bytes"
"fmt"
"log"
"net"
"os"
"sort"
)
type lines []string
func (l lines) Len() int { return len(l) }
func (l lines) Swap(i, j int) { l[i], l[j] = l[j], l[i] }
func (l lines) Less(i, j int) bool {
a, b := net.ParseIP(l[i]), net.ParseIP(l[j])
return bytes.Compare(a, b) < 0
}
func main() {
s := bufio.NewScanner(os.Stdin)
ls := lines{}
for s.Scan() {
ls = append(ls, s.Text())
}
if err := s.Err(); err != nil {
log.Fatalf("scan: %v")
}
sort.Sort(ls)
for _, l := range ls {
fmt.Printf("%v\n", l)
}
}

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