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I want to comment out a block of multiple lines in Jupyter Notebook, but can't find out how to do that in this current version.
It used to be in one of the drop down menus but is no longer there.
How do you comment out multi-line blocks of code at once?
This is not a duplicate because the solution given in the following link doesn't seem to work anymore:
How can I block comment code in the IPython notebook?
Ctrl + / does nothing.
Ctrl + / works for me in Chrome browser in MS Windows. On a Mac, use Cmd + / (thanks Anton K).
Please note, if / did not work out of the box, try pressing the / key on the Numpad. Credit: #DreamFlasher in comments to this question.
I have not yet managed to find the best way possible. Since I am using a keyboard with Finnish layout, some of the answers do not work for me (e.g. user5036413's answer).
However, in the meantime, I have come up with a solution that at least helps me not to comment each and every line one by one. I am using Chrome browser in MS Windows and I have not checked other possibilities though.
The solution:
It uses the fact that you can have multiple line cursors in an Ipython Notebook.
Press the Alt button and keep holding it. The cursor should change its shape into a big plus sign. The next step is, using your mouse, to point to the beginning of the first line you want to comment and while holding the Alt button pull down your mouse until the last line you want to comment. Finally, you can release the Alt button and then use the # character to comment. Voila! You have now commented multiple lines.
Try using the / from the numeric keyboard.
Ctrl + / in Chrome wasn't working for me, but when I used the /(division symbol) from the numeric it worked.
Quick Addition to Top Answer: CTRL + / is nice because it toggles back and forth between adding and removing # at beginning of all selected lines. Didn't see that exact nuance mentioned so just wanted to add it here. (This worked in Firefox Developer Edition 54.0b12 on Windows 7).
On a Finnish keyboard use Ctrl + ' to comment on multiple lines and use the same keys to de-comment.
Ubuntu 14.04 Google Chrome
TL;DR:
Using MacBook Pro with Spanish - ISO Keyboard.
Solution: Ctrl + -
Full story
This is an old post but reading it got me thinking about possible shortcuts.
My keyboard is a Latin Apple MacBook Pro, which is called Spanish - ISO. I tried the changing keyboard distribution to U.S. solution... this works but with this solution I have to switch keyboards every time I want to comment which... sucks.
So I tried ctrl + - and it works. The - is where the / is located in an english keyboard but doing Cmd + - only changes the Chrome's zoom so I tried Ctrl which isn't as used as Cmd in macOS.
My takeaway with this would be: if I have more shortcut problems I might try the original shortcut but using the key where the U.S. keyboard would have it.
Select the lines you want to comment out. Then press:
Ctrl + #
I tried this on Mac OSX with Chrome 42.0.2311.90 (64-bit) and this works by using CMD + /
The version of the notebook server is 3.1.0-cbccb68 and is running on:
Python 2.7.9 |Anaconda 2.1.0 (x86_64)| (default, Dec 15 2014, 10:37:34)
[GCC 4.2.1 (Apple Inc. build 5577)]
Could it be a browser related problem? Did you try Firefox or IE?
Use triple single quotes ''' at the beginning and end. It will be ignored as a doc string within the function.
'''
This is how you would
write multiple lines of code
in Jupyter notebooks.
'''
I can't figure out how to print that in multiple lines but you can add a line anywhere in between those quotes and your code will be fine.
Fn + Cmd + / in Safari browser on MacOS
On MacOS 10.11 with Firefox and a German keyboard layout it is Ctrl + ?
Select the lines on windows jupyter notebook and then hit Ctrl+#.
I add the same situation and went in a couple of stackoverfow, github and tutorials showing complex solutions. Nothing simple though! Some with "Hold the alt key and move the mouse while the cursor shows a cross" which is not for laptop users (at least for me), some others with configuration files...
I found it after a good sleep night. My environment is laptop, ubuntu and Jupyter/Ipython 5.1.0 :
Just select/highlight one line, a block or something, and then "Ctrl"+"/" and it's magic :)
After searching for a while I have found a solution to comment on an AZERTY mac. The shortcut is Ctrl +/= key
I am using chrome, Linux Mint; and for commenting and dis-commenting bundle of lines:
Ctrl + /
For a Dutch keyboard layout (on Debian 9 in Chromium 57) it is Ctrl + °
Another thing to add, in the version I'm using, the code has to be initialized in order to be to comment it out using CTRL and / . If you haven't ran the code and the code isn't colorized it wont work.
If you have a Mac and not a English keyboard:
Cmd-/ is still easy to produce.
Follow the below steps:
Just go into the Mac's System Settings, Keyboard, tab "Input Sources" or whatever it might be called in English
Add the one for English (shows up as ABC, strange way to spell English).
Whenever you want a Cmd-/, you have to change to the ABC keyboard (in your menu row at the top of your screen,if you have ticked it to be shown there in the System Settings - Keyboard tab).
Cmd and the key to the left of the right "shift key" gives you Cmd-/.
P.S: Don't forget to switch back to your normal keyboard.
Related
I'm a happy user of the Nvim-R plugin, but I cannot find out how to scroll up in the buffer window that the plugin opens with R. Say for instance that I have a large output in console, but I cannot see the top of it - how do I scroll up to see this? In tmux for instance there's a copy mode that quite handily lets you do this, but how is this done in the R buffer?
An example below where I'm very curious to see what's on the line above the one begining with "is.na(a)...". How can this be achieved?
I have scoured the documentation found here, but without luck.
The answer is apparently to use Ctrl+\ Ctrl+n according to this answer on the bugreports for NVim-R.
Here's what my output looks like when I output mtcars:
When I hit Ctrl+\ Ctrl+n, I can move the cursor and I get line numbers:
To get back to interactive, I just use i, the same way I normally would.
Apparently, if you are using neovim, then you can add let R_esc_term = 0 in your ~/.vimrc file and you can then use the escape key, but if you don't use neovim, you are stuck using the two ctrl commands ¯\_(ツ)_/¯.
As pointed out by ZNK, it is about switching to normal mode in Vim's terminal. This, however, can easily fail due to cumbersome keybinding. If such is the case, remap the default keybinding to something reasonable, say, by putting this in your .vimrc:
tnoremap jk <C-\><C-n>
This works for me in Linux running Vim 8.0 in terminal (e.g. does not require Neovim). As you can see, I use 'jk' to switch from insert to normal mode. One can use Esc instead of jk, however, this makes me unable to use up arrow to retrieve command line history as been reported elsewhere.
I have a problem with the shortcut settings in Atom (Ubuntu 16.04). I'm looking for an option of switching between the tabs using "alt + tab". Somewhere I saw an info that it's already "packed in" but it's not true. So I've been told that I have to change the Keymap. I did it a couple of times using different instructions for example:
'body':
ctrl-tab ^ctrl': 'unset!'
'ctrl-tab': 'pane:show-next-item'
'ctrl-shift-tab ^ctrl': 'unset!'
'ctrl-shift-tab': 'pane:show-previous-item'
but it failed...I mean - it is working only as long as the tab with the Keymap is open!?! (I've saved it of course before closing!)
and it is not working when I use the tab option "Split left, right or down" to get double or more views at one time.
Does anyone from You know how to solve this?
Thanks in advance!
Paweł
This question might be over-answered but I could not find one. Basically I am using RStudio and the keyboard shortcut cmd + shift + c for inserting comments. Is there an other combination to insert directly the roxygen tags #' ? Or a way to modify RStudio to tell it to add the ' when I press cmd + shift + c?
You could use an RStudio addin, you'll need a fairly recent version of RStudio. I've just created an RStudio addin that comments/uncomments using roxygen2 tags, i.e. works just like code commenting, but with #'. The addin is hosted on github.
Just install and attach a convenient keyboard shortcut.
If you are interested in other available addins, see the addinmanager addin.
This isn't exactly what you're looking for. But you can add an ROxygen2 skeleton for a function by placing your cursor inside the function then pressing ctr+alt+shift+R. Then if you hit enter in the ROxygen2 codeblock it will automatically add the backtick. So an alternate workflow, edit the function, then insert the skeleton and do the documentation that way.
Rstudio find/replace
Select text to comment out, tick regex option and specify:
find: ^(.+)
replace: #' \1
Above means to find all characters (.+) following beginning of the line ^ and replace them by the #' and the first captured group \1.
vim find/replace
I find this option the easiest as I use Rstudio in vim mode. To replace text one only need to:
select text
go to the "command-line mode" by using : key
enter s/^/#' and hit enter.
s/ stands for "substitute", ^ stands for beginning of the line and #' is the text we are inserting.
This is not a default Rstudio option. Make sure you have Keybindings set to "vim" in RStudio "Global Options"
The absolute simplest answer is in the comments on the addins answer above and deserves its own billing (with attribution):
Rstudio does have column selection, to get multiple cursors alt + mouse to select, or ctrl + alt and the arrow keys, then keys move forward and back by words/lines work as expected. – Peter Apr 16 '16 at 23:55
[ETA: On Mac, ctrl + option + arrow keys or option + mouse.]
#Peter nice. in that case you could just make a chunk of cursors at the beginning of the line and and type in #' . I doubt roxygen comments are used enough to warrant a dedicated keyboard shortcut, but it wouldn't hurt to have I guess – rawr Apr 17 '16 at 1:26
I have been moving from Webstorm and RubyMine to Atom and I really miss a feature from the Jetbrains editors where you select a code block and press CMD + - and it adds language specific comment character(s) to the beginning of each line. (# for ruby. // for js, /* for css etc.).
Is there a built in shortcut for Atom or a package which provides this feature?
According to this, cmd + / should do it.
And for Windows and Linux, it is ctrl + /.
Atom does not have a specific comment-block function, but if you select more rows and then use the normal ctrl-/ (Windows or Linux) cmd-/ (Mac), it will comment all the lines.
Command + / or Ctrl + shift + 7 doesn't work for me (debian + colombian keyboard).
In my case I changed the Atom keymap.cson file adding the following:
'.editor':
'ctrl-7': 'editor:toggle-line-comments'
and now it works!
Also, there are packages:
Comment package for atom (https://atom.io/packages/comment)
Block-comment-lines https://atom.io/packages/block-comment-lines
Sublime Block Comments
Pressing (Cmd + /) will create a single line comment. i.e. // Single line comment
Type (/** and press the Tab key) to create a block comment ala
/**
* Comment block
*/
with all my respect with the comments above, no need to use a package :
1) click on Atom
1.2) then ATL => the menu bar appear
1.3) File > Settings => settings appear
1.4) Keybindings > Search keybinding input => fill "comment"
1.5) you will see :
if you want to change the configuration, you just have to parameter your keymap file
You can use Ctrl + /. This works for me.
Multi-line comment can be made by selecting the lines and by pressing Ctrl+/ .
and Now you can have many plugins for comments
1) comment - https://atom.io/packages/comment
2) block-comment-lines - https://atom.io/packages/block-comment-lines
better one is block-comment try that..
Edit your keymap.cson file and add
Windows
'.platform-win32 .editor':
'ctrl-/': 'editor:toggle-line-comments'
Mac
'.platform-darwin .editor':
'cmd-/': 'editor:toggle-line-comments'
Now just highlight the text you want to comment and hit the keybinding.
You can use Ctrl + Shift + / for Windows.
Atom does not have block comment by default, so I would recommend searching for atom packages by "block comment" and install the one suits to you.
I prefer https://atom.io/packages/block-comment because is has the closest keyboard shortcut to line comment and it works as i need it to, meaning it would not comment the whole line but only the selected text.
line comment: CTRL+/
block comment: CTRL+SHIFT+/ (with the plugin installed)
Possible reason: watch out for overlapping keybindings. It has happened in my case and deactivated the initial toggle line comment binding:
The Keybindings you can find in the Edit -> Preferences -> Keybindings of the application navbar.
The solution was overriding binding for github:toggle-patch-selection-mode
On an belgium keyboard asserted on the mac
command + shift + / is the keystroke for commenting out a block.
CTRL+/ on windows, no need to select whole line, Just use key combination on line which you want to comment out.
first select your block of code then
press cmd + / for MacOS
I recently installed Zsh in hope of a better life and brighter mornings. However, I quickly realized Zsh introduces various issues in conjunction with tmux.
The first issue was some weird stuff happening at the end of the prompt, before my commands, but this was resolved by supplying tmux with the -u flag for unicode-support. However, I am stuck with one final issue that needs resolution before I can use Zsh with tmux:
Usecase: Autocomplete a command which contains multiple suggestions
Issue: Autocompletion shifts suggestion one character to the right, while leaving the original character behind (visual bug, it is not included in the command)
Example 1.
Then I hit TAB..
Example 2.
Then I hit TAB..
Note 1: This does NOT occur when using the Bash-shell.
Note 2: I am using "oh-my-zsh". This issue only occurs when using the provided themes. This narrows it down to an "oh-my-zsh"-theme issue, not native zsh/tmux.
In case some people still get a similar issue, see also the top-voted answer of Remnant characters when tab completing with ZSH. The plugin you were using may have had the same non-printable characters issue, that would explain the symptoms.