String templates with Perl
Here is a nice thing with perl.
- You have a string template, like an e-mail, with fields to change.
- This fields are stored in a CVS file.
- Perl changes this fields with hashes and regular expressions in no time.
Note: the field names are the keys in the hash, lines of the CVS are an array with hash refs.
#!/usr/bin/perl
use warnings;
use strict;
my @data = ();
# data.csv:
# bela,fired
# julcsi,killed
# jani,promoted
my $string_template = <<EOF;
Dear <name>,
You have been <action>.
Br: Someone.
EOF
# CSV to hash
open FILE, "data.csv" or die $!;
while (my $line = ) {
my %temp_hash = ();
($temp_hash{"name"}, $temp_hash{"action"}) = split (",", $line);
chomp $temp_hash{"action"};
push @data, \%temp_hash;
}
close FILE;
# replace & print
foreach (@data) {
my $s = $string_template;
$s=~s/<(.*?)>/$$_{$1}/g;
print "$s\n";
}
qdict new release r19
New release of qdict, (r19 - as it's the 19th commit in SVN)
Changes:
- Completer-aided input combobox (for gcide)
- Better parsing (for gcide)
Download:
Source code: qdict_r19.tar.bz2
Link:
Check the "project page" for screenshots and more info: qdict
bash shortcuts
A good set of shortcuts speeds up usage of every program, this applies to bash too.
| My favourites | |
|---|---|
| Home | Move to the start of the line. |
| End | Move to the end of the line. |
| Left | Move back one character. |
| Alt + Right | Move back one word. |
| Right | Move forward one character. |
| Alt + Right | Move forward one word. |
| Ctrl + u | Delete from the cursor to the beginning of the line. |
| Ctrl + k | Delete from the cursor to the end of the line. |
| Ctrl + w | Delete from the cursor to the start of the word. |
| Esc + d | Delete from the cursor position to the end of the word. |
| Ctrl + l | Clear the screen leaving the current line at the top of the screen. |
| Alt + r | Undo all changes to the line. |
| Ctrl + r | Incremental reverse search of history. |
Some more (incomplete lists)
| CTRL Key Bound | |
|---|---|
| Ctrl + a | Jump to the start of the line. |
| Ctrl + b | Move back a char. |
| Ctrl + c | Terminate the command. |
| Ctrl + d | Delete from under the cursor. |
| Ctrl + e | Jump to the end of the line. |
| Ctrl + f | Move forward a char. |
| Ctrl + k | Delete to EOL. |
| Ctrl + l | Clear the screen. |
| Ctrl + r | Search the history backwards. |
| Ctrl + R | Search the history backwards with multi occurrence. |
| Ctrl + u | Delete backward from cursor. |
| Ctrl + xx | Move between EOL and current cursor position. |
| Ctrl + x @ | Show possible hostname completions. |
| Ctrl + z | Suspend/ Stop the command. |
| ALT Key Bound | |
|---|---|
| Alt + < | Move to the first line in the history. |
| Alt + > | Move to the last line in the history. |
| Alt + ? | Show current completion list. |
| Alt + * | Insert all possible completions. |
| Alt + / | Attempt to complete filename. |
| Alt + . | Yank last argument to previous command. |
| Alt + b | Move backward. |
| Alt + c | Capitalize the word. |
| Alt + d | Delete word. |
| Alt + f | Move forward. |
| Alt + l | Make word lowercase. |
| Alt + n | Search the history forwards non-incremental. |
| Alt + p | Search the history backwards non-incremental. |
| Alt + r | Recall command. |
| Alt + t | Move words around. |
| Alt + u | Make word uppercase. |
| Alt + backspace | Delete backward from cursor. |
| Other keybindings | |
|---|---|
| 2T | All available commands(common). |
| (string)2T | All available commands starting with (string). |
| /2T | Entire directory structure including Hidden one. |
| 2T | Only Sub Dirs inside including Hidden one. |
| *2T | Only Sub Dirs inside without Hidden one. |
| ~2T | All Present Users on system from "/etc/passwd". |
| $2T | All Sys variables. |
| @2T | Entries from "/etc/hosts". |
| =2T | Output like ls or dir. |
Here "2T" means Press TAB twice
| Escape Keys combinations | |
|---|---|
| esc+d | delete from the cursor position to the end of the word. |
| esc+f | move forward a word. |
| esc+b | move backward a word. |
| esc+t | transpose two adjacent words. |
qdict
Preface
About a month ago I started to play with QT. I just wanted to quickly pick some random subject and begin instead of waiting for a big idea and doing nothing.
The main idea is a GUI for dict. Edit field, output layout, nothing fancy, trying to be as minimalistic as possible.
Features
- Html (formatted) layout of dict for better readablility
- The entry field is a combobox which stores the previous entries
- Parsing the gcide hits for lists, notes and links.
- Unit tests for some core functions
Download
source: qdict_r15.tar.bz2
Compile & run
qmake qdict.pro
make
qdict
Todos
- Forward/backward buttons if following links
- Support for more database
- TCP connection with the server instead of parsing the output of dict
- Configuration dialog
- Text autocompletetition
- Bigger test coverage
Bash history
I took a look around recently how to make life with bash easier and the help of the history is definitely a key issue.
.bashrc:
# enable bash history set -o history # bash history file length export HISTFILESIZE=10000 # multi-line commands are stored in the history shopt -s cmdhist # no duplicates and empty lines export HISTCONTROL=ignoreboth # do not store lines: export HISTIGNORE="&:ls:[bf]g:exit" # append the history to the histfile instead of overwriting it. shopt -s histappend # update & re-read histfile after every cmd so terminals will share export PROMPT_COMMAND="history -n; history -a"
Useful keys
ctrl + r : search in history backward
Page up/down : complete command due to history.
For page up/down part, you need to have the following lines in /etc/inputrc:
"\e[5~": history-search-backward "\e[6~": history-search-forward
Links
Bash-History-Facilities
Searching for Commands in the History
Keeping bash history in sync on disk and between multiple terminals
Give
My thesis:
It was about a program I wrote, a maemo statusban plugin, the documentetion and the process I took. That time I thought that GTK is going down and I my knowledge in it is going to be obsolete soon. But I doubted that at the and of the Uni even with 1-2 years of working experience in the field, one can make some significant research with usable output. So I wrote a small applet and used all my knowledge and help of my friends and ex-colleges I gained.
I got ~1.600 downloads, well, I think it was a success. Other than me and my consultant, I don't thing anyone has ever read my thesis...
link: maemo page
Details:
Statusbar plugin for easy drag & drop data sending via Bluetooth, just drag data to the icon.
The following applications are supported yet:
- osso-notes
- osso-filemanager
- dates compiled with dnd
- osso-addressbook.
TODOs:
- patch modest to dnd support
- make pand work.
sefljungle::selfjungle();
Ok, here it comes.
This is just another techblog, mainly for fooling around and posting programming related stuff in order to create a “code portfolio”. But who knows, maybe I'll find this "public jotter" beneficial one day.
So I'm going to post my coding projects and some findings in C, C++, linux, gentoo, QT and KDE.