[riidom]

when you see "online" written as "on-line"

[dan-robertson]

I often read online as “on the web” and on-line as referring to algorithms that are supposed to incrementally produce their output based on an input stream of unknown length, eg an on-line algorithm for estimating medians.

[riidom]

Just learned about that difference. In terms of an web-based code editor with a result panel, both definitions fit a little bit, I guess.