okay, I need some help! Im trying to write a script where it looks in the file you designate, pulls apart all the words so i can count how many of each letter there is in the file, then i need to put them in the order of the most occuring letter to the least. This most likley will need a loop... (3 Replies)
Hello,
I have a name file in Unix for example : ABC_TODAYFirst.001 and I want just capture or display the 3 first letters so : ABC.
I tried with cut -c,1-3 and the name but it displays the 3 first letters of all lines.
Can you help , Thanks a lot (8 Replies)
Looking how to find only three or four letter strings using grep in a file called hello:
file contains:
TIT
TAT
RATA
ERAT
RATE
HI
RE
CA
PA
CHANGE
SANDY
ANSWER
I am using the code: (4 Replies)
Hi guys.
I have file named output.txt containing file names. one per line. I use this command to convert all characters to capital letters and write to the same file.
cat output.txt | tr 'a-z' 'A-Z' > output.txtBut at the end output.txt is emtpy. Could anyone help?? (6 Replies)
i have 3 files as below:
i want to print 1st,2nd,5th and 10th filed of 1st to 5th lines from each files into a line of an output file, so the result would be:
:
{line1}(field 1 of line 1 from file 1)(field 2 of line 1 from file 1)(field 5 of line 1 from file 1)(field 10 of line 1 from file... (1 Reply)
Hi everyone. I need to change a script (ksh) so that it will grep on the 1st 2 letters in the second column of a 5 column file such as this one:
192.168.1.1 CAXY0_123 10ABFL000001 # Comment
192.168.1.2 CAYZ0_123 10ABTX000002 # Comment
192.168.2.1 FLXY0_123 11ABCA000001 ... (4 Replies)
I am connecting to a device using telnet, I want my script to perform certain commands : ie- show device , show inventory..etc and write the output it sees from the terminal to a file.
this is what I have got :
#!/usr/bin/expect --
set running 1
spawn telnet <ip address>
expect ... (1 Reply)
I know that I can use wild cards:ls ???????to list files 7 characters long, but how do i omit the .?! and spaces?
Please use CODE tags when displaying sample input, sample output, and code segments. (2 Replies)
I have a file name :
var=UsrAccChgRpt
I want to make them upper case.
Tried:
$var | tr
Error:
tr: Invalid combination of options and Strings.
Usage: tr | -ds | -s | -ds | -s ] String1 String2
tr { -d | -s | -d | -s } String1
Could you please help. I am using AIX... (2 Replies)
I have 2 big files over 4Gbs each. I'm looking for a way to print 1 file, then when that file finish printing another file proceeds to print beside it and merge the lines together. How would to cmd or code this?
from itertools import izip_longest
with open("file1") as textfile1,... (14 Replies)
Discussion started by: bigvito19
14 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)