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Self-tutoring about [Li|U]nix: the tutor continues about grep capabilities. On the system I use, the + (one or more) operator will work with grep if escaped. With the -E option you don’t have to escape it. Therefore, grep “^t\w\+[.]txt” will …
Self-tutoring about Linux and Unix: Can one use Perl’s amazing regex features with grep? Perhaps some of them: the tutor begins… Perl’s convenient \w and \d work with grep, as-is, on the system I use. Frankly, I’m impressed with what …
[Li|U]nix: grep, part 2: a bit about character classes Read more »
Self-tutoring about VS-Code: the tutor mentions a workaround. I’m not sure I want to disable auto-correct in VS-Code, but I want to prevent it sometimes, without experimenting with settings. What to do? I find that, if I type a word, …
Self-tutoring about Unix: the tutor continues about grep. After reading my post from yesterday, I was in disbelief. I even tried the command there several more times – it works every time. grep isn’t necessarily expected to support alternation – …
Self-tutoring about [Li|U]nix: the tutor begins about grep. grep string filename looks for the string in the file called filename. The string can be a regular expression. In my experience, a regex needs to be quoted. For instance, on the …
Self-tutoring about people and events from the past: the tutor reflects…. The massasauga rattlesnake is either threatened or endangered, depending on who you talk to and where. It inhabits wetlands in extreme Southern Ontario and the Midwest (one reason, no …
Retrospect: the massasauga rattlesnake(?), part 1 Read more »
Tutoring English, new words are always interesting – especially ones with everyday meanings. runnel: a brook. Source: Mish, Frederick C. (editor). Merriam-Webster Dictionary. Springfield: Merriam-Webster, 2004.
Self-tutoring about Perl regular expressions: the tutor makes an observation. Perl has the interesting character class \h that signifies “horizontal whitespace.” It can be very useful to capture a word in a sentence. Suppose, for instance, you want to capture …
Self-tutoring about people and events from the past: the tutor reflects…. In the village I lived when I was 10-13, there was a little one-room rec centre. Next to it were tennis courts. Land usage is different between growing places …
Self-tutoring about regular expressions with JavaScript: the tutor mentions the idea of the boundary condition. In JavaScript regex, a boundary condition can mean a whitespace or punctuation before or after a word. That’s my understanding, anyway. Source: developer.mozilla.org