The text between point and the mark is called the region. At its core is an interpreter for emacs lisp, a dialect of the lisp programming language with extensions to support text editing. A nerd commenter emulation, help you comment code efficiently. If you want to give this a try, remove or comment out helmmode 1 from your. This tutorial is intended to introduce the text editor emacs and demonstrate some of the advanced techniques that are useful for researchers.
If the region is active and transientmarkmode is on, call commentregion unless it only consists of comments, in which case it calls uncommentregion. When the commentedit command is invoked, a buffer is popped up and the user edits the command as ordinary text in that buffer. If you want to test the latest versions, follow the links provided below to access the current subversion. Code gets rewritten when refactoring to accomidate for new features or when fixing bugs. With prefix argument, this command adds that many comment strings. Furthermore, if the configurable variable scalaindent. System requirement only 64bit mswindows are supported. If you are typing a comment and wish to continue it to another line, type mj or cmj commentindent. Emacs support is not included in the refdb sources, but available separately as an autotoolsbased package including a manual, allowing a. An image on your file system that you can drag to emacs. A major mode for gnu emacs for editing markdownformatted text files.
I make use of the ivy package note you can use mo in an ivy window to use multiactions otherwise the default action o will apply and the only other requirement is reddio, which is a set of sh scripts to interface with the reddit api. If a line already contains the commentstart string, m. Gnu emacs for windows can be downloaded from a nearby gnu mirror. Help says it is bound to comment region defined in newcomment. Typing an asterisk in multiline comment region, at the start of a line, will trigger indent. Emacs highlights the region whenever there is one, if you enable transient mark mode.
I recommend using it with evil though evil is optional. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. You can narrow the buffer to the region you are interested in and then use iedit to highlight change all the visible matches. An approach used by many developers is to disable a piece of code with comments, then rewrite an improved version below, test that is works and then delete the commented code. Otherwise, if there is an active region, these commands use the region as. Region selection the region is essentially what is call selection in some other applications it is the text that you have selected, or, in emacs jargon, the text that you have marked the cursor not the mouse pointer defines the position of point, which is one end of the region. Else, if the current line is empty, call commentinsertcommentfunction if it is defined, otherwise insert a comment and indent it. But this system allows me to browse, vote and comment on reddit posts all from within emacs.
Markdown mode is available below, and is generated from comments in the source code. Help says it is bound to commentregion defined in newcomment. Mx commentregion add or remove comment delimiters on all the lines in the region. Note that to call emacs a text editor is a bit of an understatement. That way, they wont be evaluated when you start emacs. The current settings for commentstyle always prefix the comment lines with if not the whole. Also, these commands have a word and region variants. As mentioned in comment commands, when the mj command adds a comment to a line, it tries to place the comment between the columns specified by the bufferlocal variables commentcolumn and commentfillcolumn or if that is nil, then the value of fillcolumn, see fill commands. You can set either the local value or the default value. Im using standard gnu emacs, not familiar with spacemacs. So, in emacs lisp code, where the comment string is commentregion adds a single cu n mx commentregion, where n is an integer, adds or removes n for example. It would be nice if emacs automatically choose the right command depending whether there is text selection. This work is licensed to you under version 2 of the gnu general public license.
For example, you can press key,99j or 99,ci to comment out 99 lines. In particular i will highlight the use of emacs as a research notebook. It can also do spell checking on comments with flyspell prog mode see spelling. First, download the latest stable version and save the file where emacs can. If emacs works fine with your configuration, check your.
How to comment out an entire block of text in emacs quora. If you dont have emacs 21, i suppose you could simply download newcomment. Im wondering what is the key to toggle line comment in python, because m. You can comment out regions by selecting them and using mx commentregion. Contribute to zielmichaemacs android development by creating an account on github. When she is finished editing, cccc pops down the edit buffer and inserts the text with proper comment syntax into the. If the selected region is not commented out, it will be commented if the selected region is already commented out, it will be uncommented. Like ret followed by inserting and aligning a comment commentindentnewline. So, in emacs lisp code, where the comment string is comment region adds a single cu n mx comment region, where n is an integer, adds or removes n for example. How to get emacs to automatically insert block comment.
Unzip the zip file preserving the directory structure, and run bin\runemacs. I dont know offhand of a way to uncomment the current line without setting the region. The main command for commenting or uncommenting each of the lines in a region is comment region. If you want something a little more flexible, ive written my own function it toggles commenting on the current line if theres no region, and if there is a region, it just calls toggles commenting on that region. I hack python so i went and looked it up and in pythonmode it executes the region. Text in the region can be indented or outdented as a group using cc to indent to the. The main command for commenting or uncommenting each of the lines in a region is commentregion. Heres a command that combines lettercase commands into one. Many emacs commands operate on an arbitrary contiguous part of the current buffer. Alternatively, you may choose to receive this work under any other license that grants the right to use, copy, modify, andor distribute the work, as long as that license imposes the restriction that derivative works have to grant the same rights and impose the same restriction. This fixes incorrect uncommenting of code regions that contain comment lines. Cc md, duplicate and comment the current line or region. To comment a region, use commentregion which is bound to cc cc in most modes, but not python by default, for some reason.
First, download the latest stable version and save the file where emacs can find it. A collection of ridiculously useful extensions for emacs bbatsovcrux. This project will focus on providing unmodified, uptodate from git master and newest release, and optimized w64 binary builds. Because comments are such an important part of programming, emacs provides special commands for editing and inserting comments. This extension facilitates moving images from point a to point b point a the source can be an image inside your browser that you can drag to emacs. In each case, emacs places point after the comments starting delimiter, so that you can start typing the comment text right away.
I dont know which version of emacs youre using, but there is will be cx c. If a line already contains the comment start string, m. To specify the text for such a command to operate on, you set the mark at one end of it, and move point to the other end. Some major modes have special rules for indenting different kinds of comments. Alternatively, create a desktop shortcut to bin\runemacs. Gnu emacs is an extensible, customizable text editorand more. With this approach you want to mark the relevant region first and call narrowtoregion cx n n. I dont know if it works asis in earlier versions of emacs, but it might be worth a shot, though upgrading emacs would be a better solution. You can configure c mode such that when you type a at the start of a line in a multiline block comment, this closes the comment. Ide interface for emacs code browsing, compilation, debug.
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