That's Vimprovement! A Better vi
When you jump to a tag using the CTRL-] command, the entire screen jumps. If you use the command CTRL-W CTRL-], the current window is split and you do a tag jump in the new window.
Suppose you have five or six small programs in a directory, and you want to jump to the definition of one of the main functions. If you do a:
command, the editor will jump to the first definition of main that it can find. This may or may not be the one you want.
The :tselect command displays all the tags that match a given name and lets you select the one you want. For example:
:tselect main # pri kind tag file > 1 F C f main a_test.cpp int main( int argc, char* argv ) 2 F f main acp.cpp int main( int argc, char* argv ) 3 F f main add.cpp int main(int argc, char* argv) Enter nr of choice (<CR> to abort): 3
What if you only know part of a name? In other words, you want to go to the function whose name is “something- process-something-data”. The :tags command can take a regular expression. In this case the command:
:tag /process.*datagoes to the first tag matching this expression. If several functions match the expression, you can use :tselect to go to the right one.
Programs contain code and comments. Code has its own structure. You do not want an editor that line wraps when you write code. But comments are merely text and it's okay to wrap text. In fact in most cases, it is highly desirable to have an editor that wraps long text lines.
The Vim editor understands the difference between commands and code. It can be configured to wrap comments and leave the code alone. This is done by putting the following lines in our .vimrc file:
:autocmd FileType c,cpp \ set formatoptions=croql cindent \ comments=sr:/*,mb:*,ex:*/,://
(Note: continuation lines in *begin* with \.)
The :autocmd command tells Vim that these commands are to be executed whenever it determines that it is working on a C or C++ file. (File names ends in .c or .cpp.)
The formatoptions tells Vim that we want to automatically wrap comments but don't want code wrapped. The next line:
tells Vim what a comment looks like. In this case we've defined the standard C comment (/*, */) and the C++ comment (//). We've also told Vim that if we are in the middle of a C-style comment, to please begin each line with a “*”.
With these options set, when you type /*<RETURN>, Vim automatically puts in a “ *” to begin the next line. Given the limited space allowed in this article, all I can really tell you is that this is a really neat feature, and you should play around with it. If you need more details, you can check out the on-line help text.
Vim is a very versatile editor. In this article we've touched on a few of the more interesting features of this editor. But we only scratched the surface. There are still hundreds of commands and options that we've not discussed. You can find out about these by reading the help text and other documentation that comes with the editor.
By introducing you to some of the new features in Vim we've given you a start toward more effective editing. How far you go from here is up to you.
Fast/Flexible Linux OS Recovery
On Demand Now
In this live one-hour webinar, learn how to enhance your existing backup strategies for complete disaster recovery preparedness using Storix System Backup Administrator (SBAdmin), a highly flexible full-system recovery solution for UNIX and Linux systems.
Join Linux Journal's Shawn Powers and David Huffman, President/CEO, Storix, Inc.
Free to Linux Journal readers.Register Now!
|Secure Desktops with Qubes: Installation||May 28, 2016|
|CentOS 6.8 Released||May 27, 2016|
|Secure Desktops with Qubes: Introduction||May 27, 2016|
|Chris Birchall's Re-Engineering Legacy Software (Manning Publications)||May 26, 2016|
|ServersCheck's Thermal Imaging Camera Sensor||May 25, 2016|
|Petros Koutoupis' RapidDisk||May 24, 2016|
- Secure Desktops with Qubes: Introduction
- Download "Linux Management with Red Hat Satellite: Measuring Business Impact and ROI"
- CentOS 6.8 Released
- The Italian Army Switches to LibreOffice
- Linux Mint 18
- ServersCheck's Thermal Imaging Camera Sensor
- Chris Birchall's Re-Engineering Legacy Software (Manning Publications)
- Petros Koutoupis' RapidDisk
- Oracle vs. Google: Round 2
- The FBI and the Mozilla Foundation Lock Horns over Known Security Hole
Until recently, IBM’s Power Platform was looked upon as being the system that hosted IBM’s flavor of UNIX and proprietary operating system called IBM i. These servers often are found in medium-size businesses running ERP, CRM and financials for on-premise customers. By enabling the Power platform to run the Linux OS, IBM now has positioned Power to be the platform of choice for those already running Linux that are facing scalability issues, especially customers looking at analytics, big data or cloud computing.
￼Running Linux on IBM’s Power hardware offers some obvious benefits, including improved processing speed and memory bandwidth, inherent security, and simpler deployment and management. But if you look beyond the impressive architecture, you’ll also find an open ecosystem that has given rise to a strong, innovative community, as well as an inventory of system and network management applications that really help leverage the benefits offered by running Linux on Power.Get the Guide