2010年1月12日 · According to Wikipedia:. Control characters are often rendered into a printable form known as caret notation by printing a caret (^) and then the ASCII character that has a value of the control character plus 64.

So apparently an up arrow (↑) is already defined -- for ALT GR+SHIFT+U. If not, you can copy the file to a directory, edit it at will, name the profile somehow (say "foo" instead of "latin") and simply run. setxkbmap -I. -layout foo (the -I. makes setxkbmap look for …

2011年9月3日 · Way back when, I had a user on a debian system, and a friend set me up with a convenient history search feature (I believe I used tcsh then), where I would type the beginning of a previous command, hit up-arrow, and it would do …

2011年7月28日 · Up and Down arrow Button in Windows forms C# visual studio 2019 Hot Network Questions Monster-of-the-week teen/kids show from the late 1990s

2010年4月24日 · u+2302 ⌂ house u+2303 ⌃ up arrowhead u+2304 ⌄ down arrowhead u+2305 ⌅ projective u+2306 ⌆ perspective u+2307 ⌇ wavy line u+2315 ⌕ telephone recorder u+2316 ⌖ position indicator u+2317 ⌗ viewdata square u+2318 ⌘ place of interest sign u+231a ⌚ watch u+231b ⌛ hourglass u+2326 ⌦ erase to the right u+2327 ⌧ x in a ...

2012年12月20日 · "ASCII" codes for arrow up, down, left and right. 11. How to show an arrow down symbol with CSS. 4.

2019年2月7日 · There is a lot of stuff that's going on, and I don't have the time right now to look up the details (which is why I'm not posting an answer myself). Anyway, when you see ^[[A appear on the screen, that's the escape sequence sent to represent the up arrow, and nothing interpreted it as such. –

2012年7月25日 · Technically, up-arrow and down-arrow are interpreted just fine; the issue is that, as IDLE uses a textbox/textfield-type window to display its data, pressing "up" and "down" just moves the cursor up or down in the window. Don't treat IDLE like a terminal window. –

2014年1月17日 · Alt+4 brings up the recent symbols box, then I navigate with arrow keys and press Enter to select. It may be about as many key strokes as Alt-codes but it's easier. The only problem/benefit is they will change order as you use them, if you hate that then making macros for the arrows Alt-codes would be another way.

Then you just need to go through a loop and check if any of the keys were pressed. These strange numbers in the string are the Virtual-Key Codes for the left, up, right and down arrow keys respectively. The boolean result is stored inside an array that can be looped through later to see if some key was pressed.