匹配搞不定

jsksnick

|031184881998|031113393113795
|031124881998|031143393113795
|031211341998|031184881998
第1列和第2列前面4位相等的行，高手指导一下！

valuebank

Post by jsksnick;1827973
|031184881998|031113393113795
|031124881998|031143393113795
|031211341998|031184881998
第1列和第2列前面4位相等的行，高手指导一下！

awk 'BEGIN {FS="|"} NF > 0 { if(substr($2,1,4) ==  substr($3,1,4)){print}}' file

heejun

<lig@other-server:~/chinaunix>$ perl -ne 'print if /^\|(\d{4})\d+?\|\1/' <<HERE;
> |031184881998|031113393113795
> |031124881998|031143393113795
> |031211341998|031184881998
> HERE
|031184881998|031113393113795
|031124881998|031143393113795

lxmxn

Post by heejun;1828178
<lig@other-server:~/chinaunix>$ perl -ne 'print if /^\|(\d{4})\d+?\|\1/' <<HERE;
> |031184881998|031113393113795
> |031124881998|031143393113795
> |031211341998|031184881998
> HERE
|031184881998|031113393113795
|031124881998|031143393113795

这个强~~学习了。。。

zogster

grep "^|\([0-9]\{4\}\).*\1" ip.txt

Jockey

Post by lxmxn;1828616
这个强~~学习了。。。

No，用Perl来做是最没挑战性的。哈哈哈...

lxmxn

Post by Jockey;1840172
No，用Perl来做是最没挑战性的。哈哈哈...

Perl 的正则太牛X啦。。