The Elegance of the ASCII Table

Post by amszmidt » Tue, Jul 23, 2024, 7:54 AM UTC

ggm wrote: post #51

fsckboy wrote: post #47

Earlier quoted context omitted.

you mean ? ascii

No I don't -I live in a different universe to you: % (uname; cd /usr/ports; ls -d */ascii) FreeBSD zsh: no matches found: */ascii % which ascii ascii not found % It's the same on OSX and debian by default doesn't install that command. If you live inside a POSIX/IEEE 1003 system and want to know the ascii table reliably then the command I run is the one which works. If your distribution doesn't ship manuals by default…

Post by nikau » Tue, Jul 23, 2024, 8:17 AM UTC

jolmg wrote: post #10

> So when you’re reading 7-bit ASCII, if it starts with 00, it’s a non-printing character. Otherwise it’s a printing character. > The first printing character is space; it’s an invisible character, but it’s still one that has meaning to humans, so it’s not a control character (this sounds obvious today, but it was actually the source of some semantic argument when the ASCII standard was first being discussed). Hmm..…

Post by bell-cot » Tue, Jul 23, 2024, 8:26 AM UTC

augusto-moura wrote: post #67

Useful tip, on linux (not sure about other *nixes) you can view the ascii table by opening its manpage: man ascii It's been useful to me more than once every year, mostly to know about shell escape codes and when doing weird character ranges in regex and C. It can be a bit confusing, but the gist is that you have 2 chars being show in each line, I would prefer a view where you see the same char with shift and/or ctrl…

Post by INTPenis » Tue, Jul 23, 2024, 8:42 AM UTC

augusto-moura wrote: post #67

Useful tip, on linux (not sure about other *nixes) you can view the ascii table by opening its manpage: man ascii It's been useful to me more than once every year, mostly to know about shell escape codes and when doing weird character ranges in regex and C. It can be a bit confusing, but the gist is that you have 2 chars being show in each line, I would prefer a view where you see the same char with shift and/or ctrl…

Post by bandie91 » Tue, Jul 23, 2024, 8:52 AM UTC

tivert wrote: post #70

pwg wrote: post #14

Earlier quoted context omitted.

You also have to keep in mind the "interface" for 1962-1968. The printer teletype machine. The "control codes" were to "control" the printhead. So "carriage return" meant move the "print carriage" back to the left margin. "New line" meant move the paper platen one line height of rotation to move the paper to the next line. In that context, "back space" was "move print head one space left" (rather more like a "reverse…

> Tab's being control characters then make a bit more sense, in that they cause the printhead to jump some fixed distance to the right. Isn't that incorrect? Tab doesn't jump a " fixed distance to the right," it jumps a variable distance to the next tab-stop to the right.