How Emacs changed my life

I became aware of Emacs in my college days but kept using ViM, I was naive and thought no one uses Vim except me. I was proud because I was using something a hacker uses.

I actively started using Emacs in first year of my job. I was working for Curl project in Persistent Systems. At that time I had choice between Curl IDE, and Emacs. I am being inspired by all the movies immediately decided to use Emacs. Slowly and gradually I learned a thing or two about in Emacs. I learned the philosophy and learned to customise my own editor.

Emacs has a good learning curve. At first you will struggle just to close the editor, save files. Absence of tabs will confuse you. But in long run you will have deep understanding of the language/platfrom you are working on. I like Most people stared setting up emacs the way I want it. I experimented with various Modes. Since then I have worked in many languages like C++, Ruby, Python, C#, Javascript/Node; But my editor stayed same.

I have never felt limited with emacs, Partly cause I am good at using Emacs and partly I don’t like IDEs. I always find intersting people using emacs, a great example will be Yukihiro Matz, Inventer of Ruby. He shared a slideshare on Emacs, go take a look.

Batch Convert Image to PDF

One of my friend was looking for a way of batch converting images in to pdfs. Well, This is how you can do it. I use mac, so tutorial is for Mac/Linux.

Mac: Install Brew From here

Linux: Install imagemagick and poppler-utils

Use this one line script to convert all the image in current folder

WordPress Author-Info

WordPress as a very nice Author-info, I like it. By default it is off unless there are more then one author post on your blog. You can turn it on without installing any stupid plugin or code edit. Follow these steps.

  • First you should update description in your WordPress user profile
  • Open phpmyadmin or equivalent.
  • Open your WordPress database.
  • Navigate to table wp_options.
  • Search for option_name field for value _transient_is_multi_author
  • Set this value to 1 (for true)

Melpa for emacs

Melpa is a Emacs mode repository. If you are not using Melpa on Emacs 24 you are really missing something.

Put this in your .emacs file.

Restart and run M-x list-packages

Grab the net with Arduino

How to access a website with multiple virtual hosts from Arduino Ethernet Shield. The problem is if you have used Arduino Ethernet Shield, then you know that you can connect a IP, But if the IP has multiple virtual hosts, it will only connect to default virtual host. If it is commercial shared VPS, You wont be able to make your site default.

Gist is use of HTTP protocol which allows you to define host in your request on virtual host server. Here are the possible headers.

http://en.wikipedia.org/wiki/List_of_HTTP_headers

You should also provide basic debugging info like “User-Agent” etc.