OpenWritings.net

MS Office

Xuan Ngo — Tue, 31 Jan 2012 18:24:45 +0000

MS Excel

Remove the grid in excel:

Select cells that you want to remove the grid.
Change the background color to white.

Remove duplicate lines in file

Xuan Ngo — Sat, 17 Dec 2011 16:43:04 +0000

gawk " !x[$0]++" inputfilename.txt > outputfilename.txt

Variables

Xuan Ngo — Fri, 02 Dec 2011 21:57:28 +0000

#!/usr/local/bin/perl
 
# Example showing how to define different variables.
# ==================================================
 
my $someString="Hello World!";  # Variable holding a string.
my $someNumber=3.1415;          # Variable holding a number.
my @someArray =("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday");
 
# Output all the variables defined.
$someNumber = $someNumber*2;
print "$someString\n";
print "$someNumber\n";
print "@someArray\n";

Installation and setup of Perl

Xuan Ngo — Tue, 29 Nov 2011 17:55:26 +0000

Download Windows version of Perl at ActiveState.
Install it.

Save the following code in a file and name it tutorial.perl .

#!/usr/local/bin/perl
print 'Hello world.';		# Print a message

Open the Command Prompt.
Execute the following command:
```
perl tutorial.perl
 
```
It should display Hello world..

Perl

Xuan Ngo — Tue, 29 Nov 2011 17:51:38 +0000

Padding zeros

Xuan Ngo — Wed, 16 Nov 2011 05:42:38 +0000

@ECHO OFF
 
SET i=1
FOR /L %%V IN (1,1,1003) DO (
CALL :Increment
)
 
ECHO "Done showing zero padding."
 
GOTO :EOF
 
:Increment
  REM Padding zeros
  SET filename=%i%
  if %i% lss 1000 set filename=0%i%
  if %i% lss 100 set filename=00%i%
  if %i% lss 10 set filename=000%i%
 
  ECHO %filename%.txt
 
  SET /a i+=1
  GOTO :EOF

Output will look like:
....
0889.txt
0890.txt
0891.txt
0892.txt
0893.txt
0894.txt
0895.txt
....

WinMerge useful setting

Xuan Ngo — Mon, 31 Oct 2011 23:06:50 +0000

I don't know why, by default, WinMerge is set to show the difference on word level. It should be on Character level. Every time that I install it, I have to change this setting.
The setting is located at Edit->Options->Editor->Line Difference Coloring. Check Character level.

Fast way to delete a lot of files and folders

Xuan Ngo — Sun, 18 Sep 2011 17:59:06 +0000

del /f/s/q foldername > nul
rmdir /s/q foldername

The first line is to delete files and output to nul to avoid the overhead of writing to screen for every singe deleted file.
The second line is to delete the remaining directory structure.

Docbook predefined special characters

Xuan Ngo — Mon, 12 Sep 2011 23:30:49 +0000

Character	Named entity	Description
™	™	Trade mark
©	©	Copyright
®	®	Registered
±	±	Plus or minus
✓	&check;	Check mark
✗	&cross;	Ballot X
↑	↑	Up arrow

Using Entities to define a shared string

Xuan Ngo — Mon, 12 Sep 2011 20:57:19 +0000

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book [
  <!ENTITY product-name "Docbook">
  <!ENTITY product-version "4.5">
]>
<book>
  <chapter>
    <title>Tutorial: Using Entities to define a shared string</title>
    <para>The latest version of <application>&product-name;</application> is &product-version;.</para>
    <para><application>&product-name;</application> is best used to write documentation.</para>
  </chapter>
</book>