Is this any different from the comment style: a = 1 # set variable a to 1 a += 1 # add 1 to a ? Comments should explain the why, not the what. `\d

Is this any different from the comment style: a = 1 # set variable a to 1 a += 1 # add 1 to a ? Comments should explain the why, not the what. `\d # digit` yes that is what it says, but why a digit? What is your ^, what is (?:) what is $, why is (?:[^\ ]) "rest of URL" [I know the answers to these, the person the comments are intending to help probably doesn't]. Where's the explanation of what it's supposed to be doing with a limited subset of URLs? # match basic URLs such as: # http://example.org # https://www.example.org # Must have no surrounding spaces, no spaces in the text. ^(?:http)(?:s)?(?:\:\/\/)(?:www\.)?(?:[^\ ]*)$ It's much clearer to me from the one-line regex that it matches "http:////////// http://////////" and that's probably an error. I don't know why it's clearer, maybe because I'm used to looking at https://www.example.org/path/ instead of https :// www. example.org/path/