Hi
I have lines like this
a=1, b=2, c=3,
a=1, d=4, e=5, b=225,
I need to extract the b=nnn... value. I dont know how many other entries will be before and after it in each line. Ive tried a basic line like
awk '/b=/, $NF ~ /,/ ' myfile.txt
but I think that it doesnt care which comma it... (5 Replies)
Hi ,
I have extract a single field from the 2nd row of a file of which the format is as given below
"Field1","Field2","Field3",...,"Field17",...
I need to cut Field17 as such (no quotes required)..
I give the command
head -2 file_name | tail -1 | cut -d "," -f17
But the output is... (2 Replies)
Hi All,
I have totally 10 source files. I want to count the delimiter In my source files line by line and need to store the result in another file. I got the output for the total count of delimiter for one file. But I am struggling to get the delimiter count line by line for each my files. Plz... (6 Replies)
Hi All,
Is there any method we can use to find what is the delimiter used in a text file, asuming the files has fixed number of colomns.
Thanks in advance.
Js (9 Replies)
I have a file in which the following pattern is there
TAG001^A<value>^A
I want to find all such values(words) which comes right next to "TAG001^A" and before the next "^A".
^A is the delimiter here.
Please help!
Note: I think ^A in unix resolves to \001 as delimiter (7 Replies)
Hi All,
I wanted to find 200th field value in delimiter file using awk.?
awk '{print $200}' inputfile
I am getting error message :-
awk: The field 200 must be in the range 0 to 199.
The source line number is 1.
The error context is
{print >>> $200 <<< }
using... (4 Replies)
Hi
I have a asterisk (*) delimited file and there are some fields which contain data having asterisk , now i want to double quote the fileds which contain data with asterisk
Ex:
input file
ID*NAME*EMAIL
1*BILL*BILL@AOL.com
2*J*OY*JOY@msn.com
in the 2nd record JOY has a asterisk value in... (11 Replies)
I need to find and replace a date format in a SQL script with sed. The original lines are like this:
ep.begin_date, ep.end_date, ep.facility_code,
AND ep.begin_date <= '01-JUL-2019'
ep.begin_date, ep.end_date, ep.facility_code,
AND ... (15 Replies)
Discussion started by: duke0001
15 Replies
LEARN ABOUT PLAN9
regexp
REGEXP(6) Games Manual REGEXP(6)NAME
regexp - regular expression notation
DESCRIPTION
A regular expression specifies a set of strings of characters. A member of this set of strings is said to be matched by the regular
expression. In many applications a delimiter character, commonly bounds a regular expression. In the following specification for regular
expressions the word `character' means any character (rune) but newline.
The syntax for a regular expression e0 is
e3: literal | charclass | '.' | '^' | '$' | '(' 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)