Trying postgresql c++ interface : pqxx

Postgresql database have an official interface to C programming language and a C++ interface derived from that. C++ is a different language from C and i think it will be more easier to deal with.

Lets give a try on the newest linux mint 20.

1. install libpqxx-dev package (sudo apt-get install  libpqxx-dev).

2. install codelite IDE (sudo apt-get install  codelite).

3. install postgresql (sudo apt-get install postgresql).

4. create an user (user1) for connecting to postgresql. Continue reading Trying postgresql c++ interface : pqxx

Java Scripting on JDK 11

JDK 11 make java command can directly run source code like other scripting language or interpreter. Lets say we have a java source file called hello.java as follow.

public class Hello {
 
  public static void main(String[] args) {
    System.out.println(“Hello World!”);
  }
 
}
 
Run the file by executing :
java hello.java
 
It works!
 
 
 
End.

Minimum Profit : A Programmer Text Editor

Minimum Profit is a text editor for programmer available to download from https://triptico.com/software/mp.html. I accidentally found this software from article related to OpenBSD and the author is the creator of this mp editor. The downloads are available in source and windows executable (Wow).

I managed to compile mp 5.38 on debian 10 using ncursesw driver which is already available on my laptop. Compilation step as follow.

Continue reading Minimum Profit : A Programmer Text Editor

Playing with Emacs – Open file, edit, save file.

Emacs is an editor, but not just it. Thats what i read on internet. Emacs like in a battle with Vim, another editor. I have play with vi so many years ago, but with emacs  it is just recently i learned to use it basic function.

Install it on ubuntu we can choose GUI or terminal version. I like the terminal version because it will be handy during my engagement with VM/Cloud which only can use terminal to manage it.

Open Emacs by typing on terminal emacs and press enter, it will show a welcome page like below.

We can move cursor to a hyperlink and press enter to go to particular subject, like tutorial or manual. Tutorial can also accessed using key combination C-h t, which mean press Ctrl and hold then press h, release keys, then press t. C is Ctrl and M is Meta (Alt/Esc).

Continue reading Playing with Emacs – Open file, edit, save file.

Create text file with ed

Unix alike system have ed for editing text file which is i feel strange at first. I learned some time ago to create small text file out of curiosity.

Lets try by creating a text file containing 3 lines.

  1. type ed on terminal
  2. type a then enter (a is append command in ed)
  3. type your text file content.
  4. To end input mode type . then enter on a line.
  5. Type w filename.txt then enter to save to a file.
  6. Type q to quit from ed.

Here we will show in a terminal.