I'm new to programming, and I was wondering how you are able to handle consecutive, timed key presses in order for the character to do something different. For example, in games like 'Super Smash Bros.' you press one button for a character to punch, and if you press it again, they will do their second punch; pressing it once more will result in a kick. How am I able to program this in Scratch 3.0 (preferrably, but an explanation in another programming language might help)?
By the way, if this helps, I am using a 'state' variable in order to handle other animations such as running; I want the character to be able to animate when the timed key presses occur.
Makey makey (in the extensions) does something similar to that, but if you wanted to make your own from scratch (no pun intended) you could do something like this example that I made: https://scratch.mit.edu/projects/382244376/
As stated earlier, makey makey is the only option...
I know, they only have a few selected options
BUT!
try this:
You usually use
when (up right down left v) pressed:
// Do something
Why don't you use
when (join(up up right right left left up down)()) pressed:
// Do Something
Yes, its the join()() block. Fill up the first blank with the combos you want, separated by a space, and leave the 2nd one empty. Drag it into the selectable part of the Makey Makey hat block, and there you go!
Related
How would one achieve the same result. I believe the keybinding for macOS Intellij is op+up/down and on windows it is alt+w/d.
Essentially the function highlights the current word, then, with successive presses, expands out to the full string/line/area in-between parenthesis/further out to the next set of parenthesis. Very useful for developing in LISP.
The closest I've gotten is this: https://vi.stackexchange.com/a/19028
Try this plug in: https://github.com/terryma/vim-expand-region
It expands selections based on Vim’s text objects.
Well this may seem comfortable but does not correspondent with the internal logic of vim itself.
See, in vim everything you enter is like a sentence. va{ for example: there is a verb v -> visually select and an object (or movement) { -> paragraph. In this case there is also a modifier a around. You can exchange stuff in this sentence and it will still work vaw, dil, cB and so on. The power of vim is greatly based on that concept.
Of course you can write a function that does vaw first, then S-v and lastly va{ but that will only work with visual selection. It will not work with c or d or anything. So I will recommend to get used to use different keys for different actions.
The visual selection is mostly not needed anyway. Change a paragraph? directly use ca} and so on.
I have found that VI/VA + WOBO (as many times as you need to expand) works similarly. Not as fast but its the same concept and you can even expand/shrink asymmetrically based on your WO's and BO's (Or OW's and OB's depending on how you look at it)
The checkbox "Smart Characters" in "Code Completion" section of Settings Browser does (at least) two things:
1) It doubles some characters when typed: ', ", (, [, {
2) It enables that I can select a piece of code, press ( (i.e. Shift+9), and the selected code becomes surrounded by parentheses: (). I also can remove parentheses by pressing ( again. I also can do this with [] by pressing [ and with {} by pressing {, i.e. Shift+[.
I do not like the first of these things so I want to disable it, but I like the second thing and want to keep it. How can I achieve this? Turning off the checkbox will disable both.
P.S. I know that when the checkbox is off, adding/removing parentheses works by Cmd+Shift+9 (which is less convenient than Shift+9) and that Cmd+[ works for [], although I do not know any working shortcut for adding/removing {} when the checkbox is off.
The setting is called "Smart Characters", which should give you a clue as to where to look. Open a Finder, type in smartCharacters, and hit Enter. You should see some partial matches as well as an exact match for NECController and NECPreferences class (and the former just calls the latter). If you investigate the classes involved a bit, you'll see that smartCharacters stores a boolean, and that smartCharactersMapping returns a dictionary mapping some characters to their "counterparts", i.e. $[ to $] and so on. Now look at senders of smartCharactersMapping, and you'll see where it's being called from.
The caller you're most likely interested in would be NECController>>smartCharacterWithEvent. So put a breakpoint in that very ugly method to see what it does. You don't care about the first two cases (the editor having a selection and there not being a smart mapping), since you want to prevent the second matching character from being inserted. So the interesting bit for you is this bit:
self newSmartCharacterInsertionStringForLeft: char right: opposite
The method only has one implementor and that one sender, so it should be safe to comment out the original method and just return the "left" character, i.e.:
newSmartCharacterInsertionStringForLeft: left right: right
^String with: left
In other words, instead of creating a string with the left and right characters, and possibly spaces between them, just return a new string with the single character you typed. Might not be the most elegant way of solving this, but it should work, and should show you how to solve similar problems in the future.
(Ideally, you'll find a better solution, post it here as an alternate answer, and contribute it to the Pharo codebase - Pharo is open source, after all.)
Is there any intellij idea shortcut to select a token in a statement?
For example, consider this:
cell.setCellValue((profileInfo.get("startTimeOfCrawl")!=null)?profileInfo.get("startTimeOfCrawl"):"");
Currently, if my cursor is on the first character of the above statement(i.e. at beginning of c of cell, if I have to select profileInfo, then I will have to use my mouse and double click on profileInfo to select that.
Another workaround I found was to use arrow keys to get cursor to profileInfo
Then use ctrl+shift+right-arrow keys to select till the end(i.e. till o) of profileInfo
This is good when my cursor is placed at beginning of profileInfo(or even end in which case we can use left-arrow key).
But if my cursor is placed somewhere in between of profileInfo then I will have to use ctrl+right (or ctrl+left) to get the cursor to either beginning or end of this token. Then I Will have to use ctrl+shift+right-arrow (or left-arrow as the case may be).
(Switching from keyboard to mouse breaks the continuity, hence looking for keyboard shortcuts.)
Is there a better shortcut to do above in 1 step?
PS: Solution to above will be very useful when making string replacements.
Use Edit | Extend Selection (Ctrl-W in the default keymaps, Alt-Up in the Mac OS 10.5+ keymap). You can press it multiple times to extend the selection to larger enclosing syntax constructs.
I can't think of a 1-step process of doing this but try using the alt to traverse via arrow keys, it will traverse it per "word" instead of per character.
You can also use alt+shift+ arrow keys to select per word.
I've created a simple parser using Lex/Yacc.
My problem is, when I run this parser and type text into the console, each time I press the left arrow key, the cursor doesn't move to the left as expected, instead I get this strange group of characters: "^[[D"
Do you have any idea how to make the left arrow key works as expected?
Thank you.
This is what is happening: The arrow key generates a sequence of characters, not single character. THey are ancient VT100 codes. The three character sequence [A is up, [B is down, [C is right, and [D is left.
Some applications (like KSHELL) handle these escape sequences. When you do a left arrow, they know to send an escape sequence back to the terminal/terminal window that move the cursor left and they internally move the position of the insert location.
Such applications also do single character input.
If you just do plain vanilla C/C++ or other high level language read operations, you do not have the functionality available to you. Your generic C/C++ input does not return data to you charater-by-character. Instead, it buffers the data until you type . In other words, this is not a YACC/LEX problem but rather a general input programming problem.
If you want editing functionality, you need to us something that will perform character level input and process the escape sequences.
As the comments say, you need to use some library that will handle this for you.
I am creating a program and I need to validate my text boxes. For the program the user needs to put in a phrase. But I am not sure how to make sure that the user actually entered in a phrase, the phrase isn't (ex.) skldkfdl, or that there isn't a space.
Strings in Java
You could do a String.Trim() to get rid of trailing whitespaces first...
then do a String.IndexOf(" ") to check for a space.
If the function returns -1, it means there is no space in the string.
Running on the assumption that you're using VB.Net - Add an event handler for the event where you want to validate the text, such as when a "Submit" button is clicked. You may want to use a CancelEventHandler, so that you can cancel the click.
In the event handler, if you're looking for just simple validation, you can use if-statements to check some simple conditions, such as if you just want to check "if input.equals(password)".
Look here for an example of using CancelEventHandler
If you're looking for some more complex validation, you'll want to use regular expressions.
This page might help get you started
Checking to see if something is "a phrase", as in, proper English, would be very difficult. You would need to make sure that all of the words are in the dictionary, and then you would need to check for proper grammar, which is incredibly complex, given English grammar rules. You may want to simplify your approach, depending on your problem. For example, maybe just check that no weird characters are used, that there is more than one space, and that each word contains a vowel.