Even the best written code can be hard to understand after we have not touched it for a month or two, let alone a year or more.
Yup, I often do a search for something and come across an upload I have written and totally forgotten about. I read it and think did I actaully write that?
Quote:
So, I learned the hard way many years ago not to write "fancy one liners" and write well documented code and scripts.
Going slightly off topic here with the second quote I was on a Python ML, (they were so obnoxious that I have long since left), and the big guns on there said there was no need to add comments as it was easy to work out what a python script does. I gave them this challenge:-
(Before reading the answer I wonder if the Python experts on here can work out what it does?)
The solution is here:- Amplitude Modulation - Tremolo, Was:- An Audio/Sound Snippet For Linux... ;o) << Python recipes << ActiveState Code
This User Gave Thanks to wisecracker For This Post:
First of all, apologies to the admins for not reading the rules totally and missing the bit about ranting off about other OSs.
But that raises a question. Where do you go to have a good rant, to vent your disgust at various corporations and thier hideous behaviour?
:confused: (2 Replies)
Guys,
I have a requirement like this.
A file has >5K records always. Separated by "|", it has 30 fields for each line. In some lines, I am getting an odd field. say, the 15th field is supposed to be 2 characters but comes in as >2. In this case, for resolving this I need to copy the value of... (6 Replies)
I wanted to say LOL and punch my face when I saw post#11 (where Don_Cragun even reduced the string manipulation with a simple regex) in the thread https://www.unix.com/shell-programming-scripting/220553-add-0-start-filename-2.html
I mean, when things can be done with just a one liner, sometimes I... (6 Replies)
Hi guys...
(Apologies for any typos etc...)
This is basically a rant.
I have been doing kids level projects and writing code to suit since around 1982, for the uProfessor, for the Sinclair Spectrum and later for the QL, IBM-XT in MS-DOS and after that for a 386DX40 up to Windows 95, until I... (3 Replies)
Discussion started by: wisecracker
3 Replies
LEARN ABOUT CENTOS
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This pragma reflects early attempts to incorporate Unicode into perl and has since been superseded.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 v5.16.3 2013-02-26 bytes(3pm)