We will see how to convert a folder of images to make them safe for web using the Mac OSX command line tool Sips. First in a shell script and then an Applescript version if you want to share this functionality with less technical users.
The flasher function is just a small command which flashes your screen until you press any key. It is usually put at the end of a long running process in order to indicate that the job is finished.
If you are on OSX and use Mail.app, but work a lot in the command line and would like a simple command to print a summary of unread emails, then this post is for you.
I don't know about you but each time I want to delete a remote branch in Git, I always end up looking online. Here is a function which will delete any branch, remote or local, with the same syntax.
You probably already know a few ways to transform variables inherited from Bash. If not, you should check them out because they are really useful. They allow you to get a substring, substitute a word for another, etc. Here are a few variable modifiers for handling paths.
We will see how we can dispatch the websocket messages with Redis using Pub/Sub so that we can scale across multiple server instances.
Essentially, jobs are processes which you started from your terminal session. You see all processes with the ps command, but processes which you started from one terminal session are also in your jobs and the shell has built-in functions to operate on them and improve your workflow.
Bit hacking is what you do when you read, write or modify bits. Reading or writing bytes is fairly trivial, but a byte is the smallest chunk that most languages deal with. If you want to access the bits, you'd have to use what are called bitwise operators like "or", "and", "xor" or "shift".