How to convert an array of bytes to a hex string in Scala

If you need to convert an array of bytes to a hex string in Scala, I can confirm that this code works:

def convertBytesToHex(bytes: Seq[Byte]): String = {
    val sb = new StringBuilder
    for (b <- bytes) {

I just used this code as part of a checksum algorithm (SHA-1, SHA-256, etc.), and I tested it against command line checksum commands to verify that it works properly.

MacOS screen annotation/presentation software

I was going to write a little application to let me annotate my MacOS screen during presentations, but the Ink2Go product looks like it does exactly what I was thinking. As I’m creating a video presentation, such as when showing how to write some Scala or Android code, I want to be able to draw on the screen, such as writing text, arrows, circles, and boxes to highlight parts of the screen. Ink2Go looks like what I want.

LaTeX box - how to create a box

Okay, now I'm getting into the crazy LaTeX code. I'm converting HTML UI prototype images into LaTeX so I can include the prototypes in my Requirements Specification docs.

So, that being my motivation, here's some LaTeX example code that shows how to display the equivalent of a textfield inside of a table. At the very least, this demonstrates how to use the LaTeX fbox command. :)