You wouldn’t think this would be necessary, but it seems that it is.
All work on my site and in my projects is copyrighted. I am the copyright holder. I have bound most of my work by the MIT, GPL, or Creative Commons licenses.
For the most part, I don’t mind if you use code on my site as long as you give proper credit. “Proper credit” can be as simple as mentioning, “I found this on ipreferjim.com” and linking back to my site.
Copying my code verbatim which contains my name and posting it on your site as your own work is a violation of the very relaxed licenses I use. Don’t do that unless you give proper acknowledgement first. If something is questionable, contact me.