added notes

running visual studio code from terminal

00 Introduction.md

@@ -103,4 +103,15 @@ There are plenty of choices when it comes to editors. The examples in this book
 Note that you may need to update the configuration database before Visual Studio Code will install.
 ```
 sudo apt-get update && sudo apt-get install libgconf2-4
-```
+```
+
+### Launching a code editor from the Terminal
+
+You will be spending a lot of time in the terminal so here is a useful tip. If you have visual studio code installed you can launch it with the contents of a specified directory. Start by editing your `.bash_profile` file located in your home directory. Since this is hidden by default you can open it in **nano** using `nano ~/.bash_profile`. Now add the following line, save the changes and exit.
+```
+code () { VSCODE_CWD="$PWD" open -n -b "com.microsoft.VSCode" --args $* ;}
+```
+Close the terminal and re-launch. Now you can open any directory.
+
+- `code ~/Documents/bookshop/` opens Visual Studio Code with the contents of the directory specified.
+- `code .` opens Visual Studio Code with the contents of the _current directory_.