Polymorphism and inheritance

Inheritance refers to using the structure and behaviour of a super class in a subclass.

Polymorphism refers to changing the behaviour of a super class in the subclass.

https://stackoverflow.com/questions/6308178/what-is-the-main-difference-between-inheritance-and-polymorphism

Regex match until you find letter

WhatMShallTweMdoT

/^.+?(?=M)/g

(.+?) makes the regex non-greedy.
(?=M) is the condition. This is a postive lookahead assertion.

What is matched is: What

For more information:
https://stackoverflow.com/questions/7124778/how-to-match-anything-up-until-this-sequence-of-characters-in-a-regular-expres

For the regex engine:
http://regexr.com

Encrypting a directory

tar -cz your_dir | gpg -c -o your_archive.tgz.gpg

Ranger: BELANGRIJK

Use in the program Ranger the command :filter to make selections of certain files.

For instance:

:filter .mp4

To undo the filter, just type :filter to empty it.

New style for Libreoffice Writer

Creating a new style for Libreoffice Writer:
1. Style/New Style/
Give a name to the new style.
Then Modify and assign values to it in Font.

2. Assign a new shortcut for it by Tools/Customize/Keyboard/Styles/Paragraph/Monaco.
And then Modify: F4