I must write a script to change all C++ like comments:
// this is a comment
to this one
/* this is a comment */
How to do it by sed? With file:
#include <cstdio>
using namespace std; //one
// two
int main() {
printf("Example"); // three
}//four
the result should be: (2 Replies)
How do I filter only comments and still keep Line breaks at the end of the line!?
This is one of the common tasks we all do,, How can we do this in a right way..!?
I try to ignore empty lines and commented lines using following approach.
test.sh
# \040 --> SPACE character octal... (17 Replies)
Hi Gurus,
I'm need of a script in which we are finding an independent word ‘boy' in a log file. We are using grep in order to do the same. Now in this log file there are some sentences where we see ‘This is a boy' and we do not want to count word ‘boy' from this sentence.
So in other word we want... (2 Replies)
:) Hi all,
I would like to remove all multiple line comments, in between the pattern /*.....*/ from my file.
The comments can be expected to be at any place in my file, like this:
/*....
This multi line comment might stretch even the entire file..!
......*/
Some text
Text1 /* Comment... (25 Replies)
Hi All,
I have text file like as below
temp.txt 1 Line
temp.txt 2 Line
temp.txt 3 Line
temp.txt 4 Line
temp.txt 5 Line
temp.txt 6 Line
temp.txt 7 Line
temp.txt 8 Line
temp.txt N Line
I expect the output like as below
processing 6 ...
processing 7 ... (6 Replies)
Discussion started by: k_manimuthu
6 Replies
6. Post Here to Contact Site Administrators and Moderators
I have read the sun-expansion scenario numerous places but I've never read any suggestion that the earth's orbit would increase to avoid being scorched. What mechanism would push it out?
As for creating a black hole by the LHC, the whole concept is silly so any number of reasons would rule it... (9 Replies)
Hello Guys,
I request anyone to do me a small help in using diff command for following.
I am trying to compare two files for content and wish to keep the content after the comparison (The resultant file can't be blank)
However, the first lines would be different in both files and I need diff... (2 Replies)
i have to remove the commented (/* . . . .*/) part which starts in one line and ends in other.help me with generic code because i have 1000 to 10k lines code which i have to remove.
data one;
set work.temp;
input name age;
infile filename;
/* dfsdf
dsfs
sdfdf
dsdd
sdfsf
sdfsf
sfs... (4 Replies)
Hi,
I am trying to remove multi line and single line comments like examples below
I have tried this pattern. it works fine for single line comments and multi line comments in a single line only. but this fails when the comments are extended in multiple lines as shown in the comment 2 of... (3 Replies)
In COBOL, a hyphen can be used in a field name and in a specific program some field names would be identical to others except a suffix was added--sometimes a suffix to a suffix was used. For example, assume I am looking for AAA, AAA-BBB, and AAA-BBB-CCC and don't want to look at AAA-BBB-CCC... (7 Replies)
Discussion started by: wbport
7 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)