Hi,
I can use the following command to create a file with some name then underscore and then date appended to it in the format 'DD-MM-YYYY':
touch "newfile_`date '+%d-%m-%Y'`"
But it gives me error when I try with the similar command to create a file with the date format 'DD/MM/YYYY'. I... (4 Replies)
I am trying to find a way to create a script which will extract the first line of a file and then rename the file (or create a new file with the same content as the old file) using the first line as the name. The first line being a single word, that is. I am hopeless at programming, if anyone can... (5 Replies)
I am looking to do something where if I created a file named backup,or whatever it would print a name like “backup_Apr_11_2011”. Thanks citizencro (1 Reply)
I have lots of files in this format:
dvgrab-2003.06.29_15-30-24.mpg
The numbers represents the date and time (YYYY.MM.DD_HH-MM-SS)
How can I extract the dates from the filenames, and use the dates in the file timestamp?
I guess this can be done by using "find", "sed" and "touch"?
Can... (6 Replies)
Hi,
I have a bash script which outputs a file with current year and month in the filename.
Last line is:
cat result_* > output.$(date +%y%m)
So for Feb 2013 this gives me output.1302
Now I am requested to run the script every first day of the month, but with the previous month in... (4 Replies)
Hi All,
I have incoming source files abcmmyy.txt I need to extract the mmyy part from the filename and pass that to a variable . I really appreciate your quick response on this.
Thanks
raj (7 Replies)
Hello experts, I want to join a file with files whosE names are mentioned in one of the columns of the same file.
File 1
t1,a,b,file number 1
t1,a,c,file number 1
t2,c,d,file number 2
t2,c,e,file number 2
t2,c,f,file number 2
t2,c,g,file number 2
t3,e,f,file number 3
file number 1... (3 Replies)
Hi,
I'm totally new in sell script and working with a shell code. I want to extract the date and time from the filenames. The filenames are different but all of them begins with WI_ SCOPE_:
WI_SCOPE_DATA_CHANGE_2017-09-12_15-30-40.txt
WI_SCOPE_BACK_COMPLETE_QUEUE_2017-09-12_15-31-40.txt... (5 Replies)
Hi,
I want to extract part of filename, for eg:
File="010020004_S-TOR-Sort-CASAP_20170519_121504_0007.TXT"
here i need first 5 words of file i.e.
FilePart="$(echo "${File%"${File#******}"}")"
Echo $FilePart
010020004_S-TOR-Sort-CASAP
But what if i get filename like below:
... (3 Replies)
Hi,
I am facing one scenario in which I need to extract exact position of date and time from the name of the files. For example, Below is the record in which I need to extract position of YYYYMMDD,HHMISS and YYMMDD. Date and time variables can come more than once. I need to use these position... (13 Replies)
Discussion started by: Prathmesh
13 Replies
LEARN ABOUT OSX
bytes
bytes(3pm) Perl Programmers Reference Guide bytes(3pm)NAME
bytes - Perl pragma to force byte semantics rather than character semantics
NOTICE
This pragma reflects early attempts to incorporate Unicode into perl and has since been superseded. It breaks encapsulation (i.e. it
exposes the innards of how the perl executable currently happens to store a string), and use of this module for anything other than
debugging purposes is strongly discouraged. If you feel that the functions here within might be useful for your application, this possibly
indicates a mismatch between your mental model of Perl Unicode and the current reality. In that case, you may wish to read some of the perl
Unicode documentation: perluniintro, perlunitut, perlunifaq and perlunicode.
SYNOPSIS
use bytes;
... chr(...); # or bytes::chr
... index(...); # or bytes::index
... length(...); # or bytes::length
... ord(...); # or bytes::ord
... rindex(...); # or bytes::rindex
... substr(...); # or bytes::substr
no bytes;
DESCRIPTION
The "use bytes" pragma disables character semantics for the rest of the lexical scope in which it appears. "no bytes" can be used to
reverse the effect of "use bytes" within the current lexical scope.
Perl normally assumes character semantics in the presence of character data (i.e. data that has come from a source that has been marked as
being of a particular character encoding). When "use bytes" is in effect, the encoding is temporarily ignored, and each string is treated
as a series of bytes.
As an example, when Perl sees "$x = chr(400)", it encodes the character in UTF-8 and stores it in $x. Then it is marked as character data,
so, for instance, "length $x" returns 1. However, in the scope of the "bytes" pragma, $x is treated as a series of bytes - the bytes that
make up the UTF8 encoding - and "length $x" returns 2:
$x = chr(400);
print "Length is ", length $x, "
"; # "Length is 1"
printf "Contents are %vd
", $x; # "Contents are 400"
{
use bytes; # or "require bytes; bytes::length()"
print "Length is ", length $x, "
"; # "Length is 2"
printf "Contents are %vd
", $x; # "Contents are 198.144"
}
chr(), ord(), substr(), index() and rindex() behave similarly.
For more on the implications and differences between character semantics and byte semantics, see perluniintro and perlunicode.
LIMITATIONS
bytes::substr() does not work as an lvalue().
SEE ALSO
perluniintro, perlunicode, utf8
perl v5.16.2 2012-08-26 bytes(3pm)