Electron open file explorer with file selected43 sec read

After creating a file and writing it to the disk, its nice to show the user the location of the newly created file in the system file explorer.

At the time of writing this there is no option in electron for opening the system file explorer with a file selected. So, like every programmer does I put the title of this post into the google search bar and found this


So this is what I did


C CRITICAL_SECTION in windows2 min read

CRITICAL_SECTION (MSDN) in Windows can be used for thread synchronization. Essentially you can create a variable and limit it’s ownership to one thread at a time.  Something like this

Threads block while waiting for ownership of counter . So only one thread will have access to counter  at a time.

Earlier we have created a TCP server using winsock (https://jijnasu.in/c-tcp-server-in-windows-thread-per-connection/). Let’s make use of CRITICAL_SECTION to count the number of requests served by our server.


GST check digit validation algorithm2 min read

GST number validation is done through 2 steps

  1. Check if there is a character in position of a character and a number in position of a number.
  2. Validate the check digit that is the last character in the GST no. with  Luhn mod N algorithm (https://en.wikipedia.org/wiki/Luhn_mod_N_algorithm)

An implementation in javascript


true  is returned if the GST.no is valid. false  if not.

Comment below if you have any questions.