Subj : Switch/Case with inkey() not working
To : Codefenix
From : Digital Man
Date : Wed Jan 08 2025 11:49 am
Re: Switch/Case with inkey() not working
By: Codefenix to All on Wed Jan 08 2025 11:36 am
> Having an odd problem with a script I'm writing.
>
> Consider the following JS code:
>
> while (!script_exit) {
> switch (console.inkey().toUpperCase()) {
> case "A":
> doThingOne();
> break;
> case "B":
> doThingTwo();
> break;
> case KEY_ESC:
> case "Q":
> case "\r":
> script_exit = true;
> break;
> default:
> log("switch default"); // hits this every time
> }
> }
>
> I'm trying to get a single key from the user and let the switch/case block
> handle accordingly. However, instead of waiting for input, it immediately
> falls to the default conition (as commented above).
by default, console.inkey() immediately returns null when there's no pending keyboard input. I recommend passing a non-zero timeout value to inkey() (so you don't peg the CPU while polling for input) and then checking for null (no input) as a possible return value.
> If I change inkey to getkey, it works as expected. I'd prefer to use inkey
> instead of getkey though, to avoid showing the cursor while waiting for
> input.
The cursor is displayed by the terminal, no the BBS, so using inkey() or getkey(), you'll still get a cursor (somewhere).
--
digital man (rob)
This Is Spinal Tap quote #46:
"Not an Exit" - we don't want an exit. Well that's true.
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