Here is a hack with sed.
The \(\([^|]*|\)\{10\}X*\) matches the first 10 fields plus already substituted Xes in field 11, and is put back as \1.
The 4 digit look-ahead \([0-9]\{4\}\) is put back as \3.
The one [0-9] is really substituted by the X.
The whole thing repeats in a loop, until nothing is left that can be substituted. (A /g option does not work because it cannot repeat on anything before the last matched character i.e. the look-ahead.)
A solution with awk or perl or bash would look simpler, because you can split on "|" and only work on field 11.
How is it possible under UNIX to restrain the number of digits of the PID number?
For instance, we have a product that generates a PID of 7 digits, and we would like to have only 6 digits maximum instead for the PID.
Thank you for your help. (1 Reply)
Hi all
Can anybody suggest me, how to get the count of digits in a word
I tried
WORD=abcd1234
echo $WORD | grep -oE ] | wc -l
4
It works in bash command line, but not in scripts :mad: (12 Replies)
Hi All,
I have a file of decimal numbers,
cat file1.txt
1.1382666907
1.2603107334
1.6118799297
24.4995857056
494.7632588468
560.7633734425
.....
I want to see the output as only 7 digits after decimal (5 Replies)
please help me write a perl program to find the difference of 1 and zeros of a 6 digit binary number.
eg If input is 111100 expected output +2
if input is 000011 expected output -2
input is 000111 expected output 0 (2 Replies)
HI all,
I have output of something like this:
crab: ExitCodes Summary
>>>>>>>>> 12 Jobs with Wrapper Exit Code : 50117
List of jobs: 1-12
See https:///twiki/something/ for Exit Code meaning
crab: ExitCodes Summary
>>>>>>>>> 5 Jobs with Wrapper Exit Code : 8001
List of... (20 Replies)
Hi,
Can anyone suggest me for the below steps.
Here the index files is nothing but a text file and In index file there are n number of pdf files.
Step 0 check out if this is for A(index file) or B(index file)
1. Read the first line of the original index file
2. Read the 9th character... (1 Reply)
Discussion started by: pavand
1 Replies
LEARN ABOUT PLAN9
regexp
REGEXP(6) Games Manual REGEXP(6)NAME
regexp - regular expression notation
DESCRIPTION
A regular expression specifies a set of strings of characters. A member of this set of strings is said to be matched by the regular
expression. In many applications a delimiter character, commonly bounds a regular expression. In the following specification for regular
expressions the word `character' means any character (rune) but newline.
The syntax for a regular expression e0 is
e3: literal | charclass | '.' | '^' | '$' | '(' 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)