-p causes Perl to assume the following loop around your program, which makes it iterate over filename arguments somewhat like sed:
LINE:
while (<>) {
... # your program goes here
} continue {
print or die "-p destination: $!\n";
}
If a file named by an argument cannot be opened for some reason, Perl warns you about it, and moves on to the next file.
Note that the lines are printed automatically. An error occurring during printing is treated as fatal.
To suppress printing use the -n switch. A -p overrides a -n switch.
"BEGIN" and "END" blocks may be used to capture control before or after the implicit loop, just as in awk.
....
-0[octal/hexadecimal]
specifies the input record separator ($/) as an octal or hexadecimal number.
If there are no digits, the null character is the separator.
Other switches may precede or follow the digits. For example, if you have a version of find which
can print filenames terminated by the null character, you can say this:
find . -name ’*.orig’ -print0 │ perl -n0e unlink
The special value 00 will cause Perl to slurp files in paragraph mode.
The value 0777 will cause Perl to slurp files whole because there is no legal byte with that value.
If you want to specify any Unicode character, use the hexadecimal format: "-0xHHH...",
where the "H" are valid hexadecimal digits. (This means that you cannot use
the "-x" with a directory name that consists of hexadecimal digits.)
....
-e commandline
may be used to enter one line of program. If -e is given, Perl will not look for a filename in the argument list.
Multiple -e commands may be given to build up a multi-line script.
Make sure to use semicolons where you would in a normal program.
This User Gave Thanks to Skrynesaver For This Post:
Hi,
I am new to this forum and i would like to get help in this issue.
I have a file 1.txt as shown:
apple
banana
orange
apple
grapes
banana
orange
grapes
orange
....
Now i would like to search for pattern say apple or orange and then put a # at the beginning of the pattern... (2 Replies)
Hi,
I think you ppl did not get my question correctly, let me explain
I have 1.txt with following entries as shown:
0152364|134444|10.20.30.40|015236433
0233654|122555|10.20.30.50|023365433
**
**
**
In file 2.txt I have the following entries as shown:
... (1 Reply)
Hi,
I have file 1.txt with following entries as shown:
0152364|134444|10.20.30.40|015236433
0233654|122555|10.20.30.50|023365433
**
**
**
In file 2.txt I have the following entries as shown:
0152364|134444|10.20.30.40|015236433
0233654|122555|10.20.30.50|023365433... (4 Replies)
trying to use sed in finding a matching pattern in a file then deleting
the next line only .. pattern --> <ad-content>
I tried this but it results are not what I wish
sed '/<ad-content>/{N;d;}' akv.xml > akv5.xml
ex,
<Celebrant2First>Mickey</Celebrant2First>
<ad-content>
Minnie... (2 Replies)
Hi guys,
got a problem here with sed on the command line.
If i have a string as below:
online xx:wer:xcv: sdf:/asdf/http:https-asdfd
How can i match the pattern "http:" and replace the start of the string to the pattern with null?
I tried the following but it doesn't work:
... (3 Replies)
I want to delete all the blank lines from a file before a certain line number. e.g.
Input file (n: denotes line number)
1: a
2:
3: b
4: c
5:
6: d
I want to delete all blank lines before line number 3, such that my output is:
a
b
c
d
I see that sed '/^$/d' in_file works... (9 Replies)
Hi I just wanted to add a new line after every matching pattern:
The method doing this doesn't matter, however, I have been using sed and this is what I tried doing, knowing that I am a bit off:
sed 'Wf a\'/n'/g'
Basically, I want to add a new line after occurrence of Wf. After the line Wf... (5 Replies)
Dear Unix Forums,
I am hoping you can help me with a pattern matching problem.
What am I trying to do?
I want to replace multiple lines of a text file (that match a multi-line pattern) with a single line of text. These patterns can span several lines and do not always have the same number of... (10 Replies)
'Hi
I'm using the following code to extract the lines(and redirect them to a txt file) after the pattern match. But the output is inclusive of the line with pattern match.
Which option is to be used to exclude the line containing the pattern?
sed -n '/Conn.*User/,$p' > consumers.txt (11 Replies)
Looking for help,
i have input file like below and want to modify to expected output, if can without create additional file, hope can direct modify it.
have 2 thing need do.
1st
is adding a word (testplan generation off) after ! ! IPG: Tue Aug 07 14:31:17 2018
2nd
is adding... (16 Replies)
Discussion started by: kttan
16 Replies
LEARN ABOUT PHP
ctype_xdigit
CTYPE_XDIGIT(3) 1 CTYPE_XDIGIT(3)ctype_xdigit - Check for character(s) representing a hexadecimal digitSYNOPSIS
bool ctype_xdigit (string $text)
DESCRIPTION
Checks if all of the characters in the provided string, $text, are hexadecimal 'digits'.
PARAMETERS
o $text
- The tested string.
RETURN VALUES
Returns TRUE if every character in $text is a hexadecimal 'digit', that is a decimal digit or a character from [A-Fa-f] , FALSE otherwise.
EXAMPLES
Example #1
A ctype_xdigit(3) example
<?php
$strings = array('AB10BC99', 'AR1012', 'ab12bc99');
foreach ($strings as $testcase) {
if (ctype_xdigit($testcase)) {
echo "The string $testcase consists of all hexadecimal digits.
";
} else {
echo "The string $testcase does not consist of all hexadecimal digits.
";
}
}
?>
The above example will output:
The string AB10BC99 consists of all hexadecimal digits.
The string AR1012 does not consist of all hexadecimal digits.
The string ab12bc99 consists of all hexadecimal digits.
NOTES
Note
If an integer between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative val-
ues have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string contain-
ing the decimal digits of the integer.
SEE ALSO ctype_digit(3).
PHP Documentation Group CTYPE_XDIGIT(3)