朋友在群里发了一个文本处理的问题,题目如下:
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# cat a.txt内容如下:
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192.168.1
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192.168.2
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192.168.3
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172.19.3
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192.16.1
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192.16.2
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10.0.4
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# 点分割, 前两个字段相同, 第三个字段递增连续的,需要合并成如下结果:
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192.168.1-192.168.3
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172.19.3
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192.16.1-192.16.2
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10.0.4
各路大侠纷出招:
1、shell脚本实现:
点击(此处)折叠或打开
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[root@GS1-241 ~]# cat a
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192.168.1
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192.168.2
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192.168.3
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172.19.3
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192.16.1
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192.16.2
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10.0.4
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192.16.29
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192.16.9
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192.16.99
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192.16.100
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[root@GS1-241 ~]# bash a.sh
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10.0.4
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172.19.3
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192.16.1-192.16.2
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192.16.9
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192.16.29
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192.16.99-192.16.100
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192.168.1-192.168.3
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[root@GS1-241 ~]# cat a.sh
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#!/bin/bash
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IFS='.'
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AB=''
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C=0
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tmp=''
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while read a b c
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do
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if [[ "$AB" == "$a.$b" && $(( $C + 1)) -eq $c ]];then
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tmp="$tmp $a.$b.$c"
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elif [[ "$tmp" == "" ]];then
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tmp="$a.$b.$c"
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else
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tmp="$tmp\n$a.$b.$c"
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fi
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AB="$a.$b"
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C=$c
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done < <(sort -t. -k 1n -k 3n a)
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echo -e "$tmp" | sed -r "s/ .* | /-/g"
2、sed实现(看哭了)
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donvan ~ /tmp $ cat test_file
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192.168.1
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192.168.2
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192.168.3
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172.19.3
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192.16.1
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192.16.2
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10.0.4
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donvan ~ /tmp $ cut -d '.' -f1,2 test_file |sort -u|xargs -i sed -n ':a;/{}\.[0-9]*$/{s/^/-/;$bb;N;ba;:b;};s/\n[^\n]\{1,\}$//;/^-[^-]/{s/^-//p;q};s/-//g;/^[^\n]*\n[^\n]*$/{s/\n/-/p;q};/\n.*\n/{s/\n.*\n/-/p;q}' test_file
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10.0.4
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172.19.3
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192.16.1-192.16.2
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192.168.1-192.168.3
3、powershell大牛出招
4、awk实现
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sort -t. -k 1n -k 3n a.txt | awk -F. '{if(AB==$1"."$2 && C+1==$3){e=$0}else{if(e!=""){print s"-"e}else{print s}; s=$0;e=""}; AB=$1"."$2; C=$3}END{if(e!=""){print s"-"e}else{print s}}'
5、看大伙热情高涨,我也忍不住用python实现了一下
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>>> b = ['10.0.4', '172.19.3', '192.16.1', '192.16.2', '192.168.29', '192.168.9', '192.168.3', '192.168.4', '192.168.5']
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>>> c = sorted(b, key=lambda x:(".".join(x.split(".")[:-1]), int(x.split(".")[-1])))
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>>> a = []
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>>> for i in range(len(c)):
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... if not a:a.append(c[i])
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... if i != len(c) - 1:
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... if ".".join(c[i].split(".")[:-1]) == ".".join(c[i+1].split(".")[:-1]) and int(c[i].split(".")[-1])+1 == int(c[i+1].split(".")[-1]):continue
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... if a[0] != c[i]:a.append(c[i])
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... print "-".join(a)
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... a = []
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...
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10.0.4
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172.19.3
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192.16.1-192.16.2
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192.168.3-192.168.5
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192.168.9
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192.168.29
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>>>
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