which checks from line #1 till /Listen/ is encountered the first time. The trick is "reusing" the "previous regular expression" for the range end definition. /Listen/ will be evaluated for line 1, and can be reused from then on.
How can I insert, say lines 500 - 700 from another file into the current file on the current line (cursor) that I am editing while in vi (AIX).
I know how to insert the entire file but how do you do it when you only need certain lines from a huge file?
I've referenced my Unix Unleash book but... (2 Replies)
Hi folks,
i need to insert the same set of lines between each line
input lines
111111
aaaaaa
333333
output should be
111111
1
2
3
aaaaaa
1
2
3
333333
1 (2 Replies)
Hi,
I want to insert some lines in between the contents of a file but the file format should not be changed.
#!/usr/bin/sh -
# Link appropriate OS specific versions of vxicap and vxchk4badblks
vxlvmlink()
{
vxipath=/usr/lib/vxvm/bin
relmajor=`uname -v`
... (1 Reply)
Hello All,
I am new to this forum. I am currently facing a problem in manipulating files.
I have two files called old-matter and new-matter
# cat old-matter
abc: this, is a, sample, entry
byi: white board, is white in color
rtz: black, board is black
qty: i tried, a lot
asd: no... (1 Reply)
Hi,
I have one file, say file 1, that has data like below where 19900107 is the date,
19900107 12 144 129 0.7380047
19900108 12 168 129 0.3149017
19900109 12 192 129 3.2766666E-02
... (3 Replies)
Hi,
I copied the contents of a binary file into a .text file using hd (hexdump) command. The data in binary file is such that I get in many places like following
00000250 00 00 00 00 3f 2d 91 68 3f 69 fb e7 00 00 00 00 |....?-.h?i......|
00000260 00 00 00 00 00 00 00 00 00 00 00 00 00... (2 Replies)
Hello friends! I am working a Psychology/Neuro* project where I am sorting inline citations by category. The final step of the process has me a little stuck. I need to take citations from a text list and sort them in another text file.
Here is a file X example... (1 Reply)
Data file example
I look for primary and * to isolate the interesting slot number.
slot=`sed '/^primary$/,/\*/!d' filename | tail -1 | sed s'/*//' | awk '{print $1" "$2}'`
Now I want to get the Touch line for only the associate slot number, in this case, because the asterisk... (2 Replies)
Hello all,
I have a large csv file where there are four types of rows I need to merge into one row per person, where there is a column for each possible code / type of row, even if that code/row isn't there for that person.
In the csv, a person may be listed from one to four times... (9 Replies)
Hi, I need to print lines which are matching with start pattern "SELECT" and END PATTERN ";" and only select the last "select" statement including the ";" .
I have attached sample input file and the desired input should be as:
INPUT FORMAT:
SELECT
ABCD,
DEFGH,
DFGHJ,
JKLMN,
AXCVB,... (5 Replies)
Discussion started by: nani2019
5 Replies
LEARN ABOUT PLAN9
regexp
REGEXP(6) Games Manual REGEXP(6)NAME
regexp - regular expression notation
DESCRIPTION
A regular expression specifies a set of strings of characters. A member of this set of strings is said to be matched by the regular
expression. In many applications a delimiter character, commonly bounds a regular expression. In the following specification for regular
expressions the word `character' means any character (rune) but newline.
The syntax for a regular expression e0 is
e3: literal | charclass | '.' | '^' | '$' | '(' e0 ')'
e2: e3
| e2 REP
REP: '*' | '+' | '?'
e1: e2
| e1 e2
e0: e1
| e0 '|' e1
A literal is any non-metacharacter, or a metacharacter (one of .*+?[]()|^$), or the delimiter preceded by
A charclass is a nonempty string s bracketed [s] (or [^s]); it matches any character in (or not in) s. A negated character class never
matches newline. A substring a-b, with a and b in ascending order, stands for the inclusive range of characters between a and b. In s,
the metacharacters an initial and the regular expression delimiter must be preceded by a other metacharacters have no special meaning and
may appear unescaped.
A matches any character.
A matches the beginning of a line; matches the end of the line.
The REP operators match zero or more (*), one or more (+), zero or one (?), instances respectively of the preceding regular expression e2.
A concatenated regular expression, e1e2, matches a match to e1 followed by a match to e2.
An alternative regular expression, e0|e1, matches either a match to e0 or a match to e1.
A match to any part of a regular expression extends as far as possible without preventing a match to the remainder of the regular expres-
sion.
SEE ALSO awk(1), ed(1), sam(1), sed(1), regexp(2)REGEXP(6)