Just starting into The Little Schemer, and have a very basic Dr. Racket IDE question:
How can I clear the interpreter screen?
How can I set the up arrow to display the previously-typed items (like in Bash) rather than the current behavior of scrolling up the screen?
My searches are coming up blank, possibly because I don't know the technical term for these actions.
Here's how:
Click on the "run" button, as you discovered
Press Esc + p
And this is the relevant page in the documentation.
1 clear interactions window
As you found out, pressing RUN |> starts up a new instance of the selected language, runs everything in the definition window and clears everything you've done in interactions window (repl).
2 get previous entries like in a shell
a) In the Racket IDE you can hold CTRL with arrow keys to get to previously written statements in the interactions window.
b) Racket can be run from terminal too. When in CLI you type racket it starts up the read-eval-print loop with racket loaded and if you enter (require xrepl) as the first statement you have similar to readline capabilities with up-arrow to get previous, CTRL+r to search history and REPL-commands like ,apropos, ,help and so on. It's called eXtended REPL
Related
I'm using the terraform plugin specifically but this is a more general intellij hotkey question.
I start typing a supported element and autocomplete pops up:
Hit tab and it sets up the method and puts the cursor in the first input and I can start typing and it gives me possible inputs:
But when i hit tab or enter it just completes it and leaves the cursor where it is:
Is there a hotkey to complete one of those options and then also jump to the next input?
There is a ticket for this feature, but its not implemented yet, please vote: https://youtrack.jetbrains.com/issue/IDEABKL-7063
The plus / minus signs are gone to expand / collapse regions. The vertical lines to indicate regions are gone too.
The regions are collapsing and all the commands under edit, outlining work fine.
It's just I have to double click on the collapsed region to expand and there's no way to collapse a region with the mouse. Only the shortcut keys (ctrl m, m) or the menu will do it.
I swear it was right this morning but I did something to mess it up. I can't find any option in tools to fix it either.
UPDATE
Now, some files are doing this and other files (both opened at same time) are not doing it. If anyone can explain, I'm all ears.
Press ctrl+, (control plus semicolon) to open the settings. And type Folding Strategy in the setting's search bar. It is set to auto by default. You can set it to always for the controls to be visible at all times, otherwise, it shows only on mouse over.
This same thing happens to me multiple times a day using VS.NET 2015 Pro version 14.0.24720.00 Update 1. Restarting the IDE always restores normal function for a while but the problem always returns, seemingly at random.
UPDATE:
I tried changing the theme from dark to blue and it restored the outlining. I then changed back to dark from blue and the outlining continued to work normally. Still a pain but definitely a lot faster than restarting the IDE.
It happened with me also. One file was just fine and other file (js) was not. I searched it a lot.
Try selecting a method/if check etc and press ctrl+M+H which is short cut for right click outlining > Hide Selection.
You can do it on the whole document as well.
This might be helpful when working on a file which has too much code in it and you are going through different functions again and again. It is painful with scrolling mouse for so long.
You can use short cut for for moving at the start of the method or at the end of the method with the following :
select parenthesis { start or end } and press ctrl+}
Hope this helps.
It works again.
I closed all windows and reopened my code file.
Now it shows the plus minus glyphs again.
I know this is an old post, but I wanted to share a quick solution. if you right click and hover over 'Outlining' and then click 'Collapse to Definition', the widget comes back. Then just press [ctrl] + z to undo and continue where you left off.
With Golang, if the code has some syntactic mistakes that would prevent it from compiling, the language server cannot decide which parts of the code are collapsible, and which not.
Therefore the solution is either switching to the Folding Strategy in VSCode settings to indentation folding, or fixing the syntactic errors.
Simple solution : CTRL + M + O, then CTRL + Z
Thanks to SparrowEatsHawk
I like VIM a lot because it kind of doubles the power of my keyboard in a way. It's either in insert or motion or whatever they call it mode.
Navigating through source code, typing code, while being able to keep my hands in the touch type position is great.
But when a dialog box is opened (eg. the one using ctrl+F12), if I have to select something other than the first one in the list, I am forced to have to move my right hand to the cursor keys.
Is there a way so that I can use J and K or else something with ctrl or alt or something, so that I can select an item while keeping my hands in the touch typing position?
You can redefine shortcuts for the Up, Down, Left, Right actions in File | Settings | Keymap (the regular keymap that has nothing to do with IdeaVim). IdeaVim provides Vim emulation only for code editors like file editors, interactive language consoles, etc.
Edit: I guess you can't use j and k since characters typed in the structure window are reserved for searching. But you can use Ctrl+N and Ctrl+P which is the same as the navigation shortcuts for pop-up windows in Vim.
Edit 2: You can't use Ctrl+N and Ctrl+P as well due to this bug in IntelliJ.
Apologies upfront if this is a silly question, but it's annoying me to no end and I can't figure it out.
I'm using Visual Studio 2013 Professional, and I usually code in C# where when using the Intellisense, when I press Enter to select a method or something it adds my selection and I can continue typing on the same line.
But at the moment I'm working on a project which is in VB.NET, and when I use the Intellisense in the same way it puts my cursor in the next line, i.e. I press Enter to select whatever, it adds my selection and starts a new line, so I have to press the Backspace to go back to the previous line. It's so annoying!
Is there a way to change this behaviour so the cursor doesn't go to the next line? I've looked at the settings available in Tools > Options but can't figure it out, and searching Google for anything similar hasn't been successful.
Found it here (paragraph List Members)
You have toggled to suggestion mode instead of completion mode.
You can also change to suggestion mode, in which only the text you type is inserted into the code. For example, if you enter an identifier that is not in the list and press TAB, in completion mode the entry would replace the typed identifier. To toggle between completion mode and suggestion mode, press CTRL+ALT+SPACEBAR or click Edit/IntelliSense/Toggle Completion Mode.
So, either use TAB/SPACEBAR (as I said in the comment) or press CTRL+ALT+SPACEBAR to switch back to completion mode.
EDIT: I've found out that whenever you type Stri (String will show highlighted in the list now) and you press . (dot) it will autocomplete and stay at the same line.
I think your way of doing this in C# isn't possible in Visual Basic.
I had the same problem and discovered that Auto list members was not enabled on my machine. It's under Tools > Options > Text Editor > Basic > General. This gave me the intellisense I was looking for.
Simple thing which can be used when you face this kind of issue is to press
tab key instead of Enter key when the IntelliSense provided me prediction list.
A keyboard shortcut to comment/uncomment out a piece of code is common in other programming IDE's for languages like Java, .Net. I find it a very useful technique when experimenting through trial and error to temporarily comment out and uncomment lines, words and parts of the code to find out what is and isn't working.
I cannot find any such keyboard shortcut on the Mathematica front end in version 7. I know that it is possible to comment out code by selecting the code, right mouse click and select Un/Comment from the menu that appears but this is too slow while coding.
I tried to access this using the menu key Menu on the keyboard but Mathematica frontend doesn't respond to or recognise this key unlike other applications, this could have allowed a key combination for commenting. Can someone else verify that this isn't unique to my machine and that the key isn't recognised by mathematica. I looked at this question and looked in the KeyEventTranslations.tr file but I don't think there is any way to create a shortcut to do this(?). Should I just live with it?
Any other suggestions?
(I have seen there is an Emacs version of mathematica, I have never tried Emacs or this Mma version and imagine that it would have this ability but would prefer not to go to the trouble and uncertainty of installing it. Also I would guess that the Wolfram Workbench could do this, but that may not be worth the investment just for this.)
You can install the shortcut in Mathematica 7.0.x if you are willing to edit the Mathematica system file MenuSetup.tr. You can find it in the same location as the KeyEventTranslations.tr file (i.e. in the installation under "SystemFiles/FrontEnd/TextResources/platform"). In MenuSetup.tr, locate the following line under the definition of the Edit menu:
MenuItem["Check &Balance", "Balance", MenuKey["B", Modifiers->{"Control", "Shift"}]],
Immediately below that line, insert the following:
MenuItem["Un/C&omment Selection", KernelExecute[FE`toggleComment[]], MenuKey["/", Modifiers->{"Command"}], MenuEvaluator -> Automatic, Method -> "Queued"],
The Un/Comment Selection command is now available under the Edit menu, with the keyboard shortcut Cmd-/ or Alt-/ depending on your platform -- just like in Mathematica 8 where this command comes pre-installed.
Please take as read the usual disclaimers about hacking the Mathematica installation files -- no warranty is offered :)
I do not know of any way to map this function to some shortcut involving the Menu key.
Shortcut Key, No Menu
The preceding steps mimic what Mathematica 8 does by installing a new menu item. If you prefer to leave the menus unchanged, then you can install the shortcut in KeyEventTranslations.tr instead. Add the following line:
Item[KeyEvent["/", Modifiers->{Command}], KernelExecute[ToExpression["FE`toggleComment[]"]], MenuEvaluator -> Automatic, Method -> "Queued"]
You'll need a comma on the end of that line if it is not the last item in the list.
Select the code and press one of the following:
Alt+/
Alt-E-O
Alt+E+O
Notes:
Tested only on Windows, using Mathematica 8.
On my non-US keyboard (ABNT Brazil), the shortcut Alt+/ doesn't work, instead I use Alt+E+O.
Here is code for your KeyEventTranslations.tr file that will comment out code. I am still working on the other half.
Item[KeyEvent["/", Modifiers -> {Command}],
FrontEndExecute[{
NotebookApply[FrontEnd`InputNotebook[],
"(*\[SelectionPlaceholder]*)"
]
}]
],
This binds it to Alt+/ as it is in Mathematica 8.