Re: [MLUG] Vi Regex problem

[Mike Miller <EMAIL:PROTECTED>]

Here's an interesting use of what I was just taught:

perl -e 's/^>(From \S+\s+\S+\s+\S+\s+\d+\s+\d+:\d+:\d+\s+\d+)/$1/g' -p

This can be used to fix a Listserv archive log to make it back into a
proper mbox file.  It takes the '>' off of the front of lines that begin
each individual message.  The first line of a proper e-mail message
matches this perl regular expression:

^From \S+\s+\S+\s+\S+\s+\d+\s+\d+:\d+:\d+\s+\d+

Coincidentally, I had another regexp problem today.  I need to use some
sort of grep command to grab lines that match some string in the fourth
column of data in a text file.  The columns are separated by a single
space.  This seems to work:

Let $string represent the string we are interested in grepping in the
fourth column of the infile:

egrep '^[\!-~]+ [\!-~]+ [\!-~]+ $string ' infile > outfile

The regexp '[\!-~]' matches any ascii character including
!"#$%&'()*+,-./{|}~ and everything covered by '[0-z]'.  Note that there
are many characters in '[9-A]' and in '[Z-a]' that are neither letters nor
numbers but match '[0-z]'

In other words, I think '[\!-~]' matches any ordinary ascii character
except for space.  If you want to match space too, use '[\ -~]'.

Mike


"man ascii" produces this (among other things):

       0 NUL   1 SOH    2 STX    3 ETX    4 EOT    5 ENQ    6 ACK    7 BEL
       8 BS    9 HT    10 NL    11 VT    12 NP    13 CR    14 SO    15 SI
      16 DLE  17 DC1   18 DC2   19 DC3   20 DC4   21 NAK   22 SYN   23 ETB
      24 CAN  25 EM    26 SUB   27 ESC   28 FS    29 GS    30 RS    31 US
      32 SP   33 !     34 "     35 #     36 $     37 %     38 &     39 '
      40 (    41 )     42 *     43 +     44 ,     45 -     46 .     47 /
      48 0    49 1     50 2     51 3     52 4     53 5     54 6     55 7
      56 8    57 9     58 :     59 ;     60 <     61 =     62 >     63 ?
      64 @    65 A     66 B     67 C     68 D     69 E     70 F     71 G
      72 H    73 I     74 J     75 K     76 L     77 M     78 N     79 O
      80 P    81 Q     82 R     83 S     84 T     85 U     86 V     87 W
      88 X    89 Y     90 Z     91 [     92 \     93 ]     94 ^     95 _
      96 `    97 a     98 b     99 c    100 d    101 e    102 f    103 g
     104 h   105 i    106 j    107 k    108 l    109 m    110 n    111 o
     112 p   113 q    114 r    115 s    116 t    117 u    118 v    119 w
     120 x   121 y    122 z    123 {    124 |    125 }    126 ~    127 DEL

--
To unsubscribe, go to http://mlug.missouri.edu/members/edit.php

Archives are available at http://mlug.missouri.edu/list-archives/