Sorry if these are obvious answers but I've googled around and can't seem to find what I'm looking for.
When I have multiple files open in split screen mode using C-x C-3 how do I close JUST the window I'm currently in and no other?
I'm using Ruby and it doesn't seem to auto indent my def end correctly.. is there a Ruby plugin that will fix this?
Is there a command to go to a specific line?
How do I interpret ruby from within emacs?
1. When I have multiple files open in split screen mode using C-x C-3 how do I close JUST the window I'm currently in and no other?
To close current view C-x 0. (Btw, I think you're referring to C-x 3.)
2. I'm using Ruby and it doesn't seem to auto indent my def end correctly.. is there a Ruby plugin that will fix this?
Have a look at
ruby-mode for emacs
RubyMode
3. Is there a command to go to a specific line?
Sure, M-g g (or M-x goto-line)
4. How do I interpret ruby from within emacs?
Don't know. You could try rubydebug.
You can also see C-h b which will give you key binding for the current-buffer to give you a lot of additional things that you might need. Once you install any Ruby Mode, you can also use C-h m to see key binding for that specific modes in your current buffer, including ruby mode.
for Q3) in addition you might want to know
C-h w COMMAND
will always show you the key binding for a funcion
C-h w goto-line RET
goto-line is on M-g g, M-g M-g, <menu-bar> <edit> <goto> <go-to-line>
for Q4) you could start a shell in a buffer, either M-x eshell or M-x shell and the simply run your script there.
Using the eshell configuration in [1] you can easily switch between the shell and your script source (pressing C-z).
[1] http://www.emacswiki.org/alex/2008-08-19_Emacs_on_Windows
Related
Sorry for any duplicates, but I am lacking the correct words to google the answer myself.
I am using ess with emacs to run R in a terminal in emacs, kind of like:
Start emacs
M-x term, start bash
Start R (interactive mode)
M-x ess-remote, select R as language.
When I quit R, I want to turn off the ess-state and use the normal "term" state.
I am using GNU Emacs 23.2.1 and ess v. 13.05.
No easy way. Unless you use screen, the preferred way to use ESS with remotes is through tramp. See the official docs.
Something in my config is unsetting/overwriting some standard keybindings for C-c C-e so that commands in various major modes don't work properly. In AUCTeX C-c C-e should start the "insert environment" dialogue and in org-mode the same keys should start the export/publish dialogue, but in both of these modes C-c C-e is undefined and emacs just waits for more input.
I know I could start emacs with -Q and load packages until something breaks (and if I load emacs that way and open a file in org-mode, the keybindings work as they should) but, like lots of people, at some point my init file became monstrously big. Is there a quicker, smarter way?
[EDIT] Nothing in my config is unsetting C-c C-e explicitly.
The debugger might give you enough clues to sort it out. Try adding the following to the beginning of your .emacs:
(debug-on-entry 'global-unset-key)
You might need to try 'local-unset-key as well. For details see the debugger manual.
Binary search is your friend.
Go to the middle of your .emacs and add (error "here"), then launch Emacs and see if the problem persists.
If it does, then insert another error line half way between the current and the top of the file, if not, comment out the current error and add one half way between the current and the bottom.
Repeat the bisection process until you isolate the line or two which are responsible for causing the problem.
You could use C-h k C-c C-e to find out which function is bound to your combination.
In the popped up help buffer, you will get the function name, its documentation and a link to the file where it is defined. Follow that link and you will end up at the place of the function definition.
At this point, it should be simple to identify which package that is responsible for redefinition of your keybinding using the name of the file.
If this does not help, you could M-x rgrep in your customization directory for 'C-c C-e' or 'C-e' and manually check everything.
I would like to know what are all the programmer-useful shortcuts that exists in emacs.
I come from a netbeans background and I am trying to make myself comfortable with emacs -text only environment. So I am looking at shortcuts for "refactoring" the code, "auto-completion", "go to definition" etc.
How can all these be achieved in emacs ? What are other programmer-useful shortcuts ?
I'll be using emacs basically for LAMP, javascript, C, C++.
ps - you can safely assume that I know how to open a file, save a file, navigate and whatever is in the tutorial in emacs.
For auto-completion, use etags with M-xtags-search or M-xetags-select-find-tag. I use macros often to do repetitive tasks. C-x(<string of useful tasks>C-x). Also, M-xalign-regexp to beautify the code and make it more readable.
You should find most of the most used features by Emacs users in this question's answers here at Stackoverflow.
Check this site
Some the important keybindings that are not there in the tutorial are:
Previous matching bracket: C-M-b (if it doesn't work, try ESC followed by C-b)
Next matching bracket: C-M-f (or ESC C-f)
Go to start of block: C-M-u
Go to end of block: C-M-d
Start of function: C-M-a
End of function: C-M-e
Outline mode: C-u 1 C-x $ (C-x $ to revert)
Newspaper mode: C-x 3 M-x follow-mode (especially useful with today's wide-screen monitors!)
Vertical Copy
Sometimes you will need to copy a vertical patch of data, e.g. one column in a table. First press C- where you want to start copying. Then go to the end of the column and press C-x r k. To paste the column press C-x r y. (If you don't want to delete original column, just press C-_ there once to restore it and then press C-x r y at target.)
To start, here is one :
Meta - / -> does code completion
M-x diff-buffer-with-file
M-x revert-buffer
When working with versioning (I use git), M-x diff-buffer-with-file is really useful. When you have a file open in a buffer in emacs, then you do a git checkout or some other action that touches that file, emacs will complain at you when you try to edit the buffer. M-x diff-buffer-with-file is helpful to see if you will break anything by keeping what's in the buffer. If something has changed and you want to grab the file from disc and put it in the buffer, do M-x revert-buffer.
I load GNU emacs in it's own window by typing emacs in the terminal.
I like to use the keybindings from pc-selection-mode, which allows you to highlight characters using shift-right or shift-left, or entire lines by pressing shift-up or shift-down.
The problem is that when I run emacs in the terminal by typing emacs -nw, the latter 2 keybindings don't work. I can highlight characters using shift-left and shift-right, but pressing shift-up and shift-down doesn't do anything. The cursor stays where it is.
How do I fix this problem? Why is it even occurring? I'm using GNU Emacs 23.1.1, and I've confirmed that the same version is being used both when emacs is in it's own window and when emacs is running inside the terminal.
Thanks for any help
A lot of times the bindings just aren't listed, or are mapped wrong. You can try M-x show-lossage (or C-h l) to see if the escape sequences reach emacs or not. If they do, you might want to try xterm-extras -- it's always worked even as I migrate between different versions of linux and solaris, and as I ssh between them (which is often a source of problems).
Frequently, I've dug into apropos and docs looking for something like the following only to give up to get back to the task at hand:
(repeat-last-command)
do the last C- or M- command I just executed (to be rebound to a fn key)
or sometimes the related:
(describe-last-function)
what keystroke did I just mistakenly issue, the effect of which I'd like to add to my bag of tricks. describe-key is close, but requires knowing what I typed.
Am I simply asking too much from my trusty sidekick?
Repeat functionality is provided by the repeat.el Emacs Lisp package, which is included with standard Emacs distributions. From repeat.el's documentation:
This package defines a command that
repeats the preceding command,
whatever that was, including its
arguments, whatever they were. This
command is connected to the key C-x z.
To repeat the previous command once,
type C-x z. To repeat it a second time
immediately after, type just z. By
typing z again and again, you can
repeat the command over and over.
To see additional information about the repeat command, type C-h F repeat RET from within Emacs.
Repeat last command
C-xz
Once you pressed it, just press only
z
after that and it will repeat (without having to press C-x again).
Yes, there is a repeat command. It's called repeat:
You can repeat commands with C-x z, and hit z to keep repeating.
A bit shocking nobody mentioned repeat-complex-command, available from the key binding C-x ESC ESC.
with regards to 'describe-last-function':
There's a variable last-command which is set to a symbol representative of the last thing you did. So this elisp snippet - (describe-function last-command) - ought to bring up the documentation for the thing that immediately happened.
So you could make a trivial working describe-last-function like so
(defun describe-last-function()
(interactive)
(describe-function last-command))
Put that elisp in .emacs or equivalent, and you'll have a M-x describe-last-function.
If you've banged on a few keys or done something that modified last-command since the thing you're interested in, the command-history function might be of interest. You can get that by M-x command-history
Also, M-x view-lossage shows you the last hundred(?) keystrokes you entered. So, you'll be able to see where the command is. It's what i used until i just right now found out about M-x command-history which i think i'll be using with C-h w now.
I'm not really sure, but maybe you are searching for this one?
The command C-xz (repeat) provides another way to repeat an
Emacs command many times. This command repeats the previous Emacs
command, whatever that was. Repeating a command uses the same arguments
that were used before; it does not read new arguments each time.
Emacs Manual, 8.11 Repeating a Command
May be this would help too...
From emacs Help verbatim:
C-x M-ESC runs the command repeat-complex-command
which is an interactive compiled Lisp function in `simple.el'.
It is bound to <again>, <redo>, C-x M-:, C-x M-ESC.
(repeat-complex-command ARG)
Edit and re-evaluate last complex command, or ARGth from last.
A complex command is one which used the minibuffer.
The command is placed in the minibuffer as a Lisp form for editing.
The result is executed, repeating the command as changed.
If the command has been changed or is not the most recent previous command
it is added to the front of the command history.
You can use the minibuffer history commands M-n and M-p
to get different commands to edit and resubmit.
Personally I found Sebastian's idea useful. Here is a working version
(global-set-key "\C-r" #'(lambda () (interactive)
(eval (car command-history))))
This is old, but Google pops post this up first when I was looking to retrieve the last command I typed at the Emacs prompt. None of these answers worked for me so I decided to put in my two cents for those who might stumble upon this later on as I did. I'm using Portacle, but I found what I was looking for in here so I'm hoping it's generic enough to work with different setups. Anyway, what worked for me is using C-↑ and C-↓ to cycle through the history. Using M-p and M-n worked as well, but I prefer using the arrows since I use Bash quite a bit.
dot-mode is a way to repeat the last command(s).
From its commentary:
It emulates the vi `redo' command, repeating the
immediately preceding sequence of commands. This is done by
recording input commands which change the buffer, i.e. not motion
commands.