I am trying to strip a bunch of links from a webpages source file. I find that whenever a "http://...."; is displayed, it ends with a < ..> after it. so for example, in source code we might have "http://www.google.com <br />".
So what I am trying to do is, copy the link only, to a new text file. So we have just a bunch of links in the text file. So i would need to do something like this: -find each occurrence of "http" and copy from that location until we hit a '<' character. can something like this be done in VIM? Tim Chase-9 wrote: > > On 06/11/2010 11:35 AM, fuzzylogic25 wrote: >> I tried :g/cat/.w!>> out.txt >> >> The problem with this is, for each time it finds one occurrence of cat, >> it >> then appends it to out.txt. So for each occurrence, the hard disk head >> moves. This causes alot of mechanical movements. > > I've not really had an issue with this -- even a couple thousand > file open/write/close iterations is pretty efficient with proper > file-system buffering...even on most files I touch on my current > box (an ancient Gateway 800MHz Celeron laptop with 384 megs of > memory a slow hard-drive, running Debian). If I do have speed > issues, I usually turn to another tool like grep: > > grep "pattern" <file.txt >out.txt > > which scans the file once, a line at a time (logically...I think > the internal implementation reads larger chunks for fewer reads), > writing matching lines to the output file which is about as > efficient as you can get regardless of file-size. > > But the proposed "redir" solutions can also do the write in one pass: > > :redir > outfile.txt > :g/pattern/ > :redir END > > one open, a bunch of writes, one close. > >> Is it possible to save it to a buffer first, then write ALL of that to >> the >> file? > > You can also use the proposed solutions of yanking to a register, > pasting that content in a new/empty buffer, and then writing that > buffer out to a file. > >> Also, can you tell me how you got to become experienced with vim? There >> are >> just soo many features/commands i dontk now where/how to start learning > > Hanging out on this mailing list puts a lot of experience in your > inbox. I've been using Vim for almost 10 years and am still > learning new stuff (the 'joinspaces' setting was new to me, > thanks to a recent thread). I think the biggest asset is > recognizing "I'm doing something where there has to be a better > way" and then looking for that solution. The help is the best > I've ever used which is also its biggest liability: learning to > use/navigate the help will help you when you go looking for > better ways to do things. Then practice -- integrate what you've > learned into your regular editing routine so that you reach for > it automatically...thinking about your editor/editing gets in the > way of doing your actual work, so the more you can do things > without thinking, the more you can focus on the real task at hand. > > Finally, this is the best mailing list I'm on...Several others > are pretty good (comp.lang.python, Django Users & Django > Developers, and the Sed users) when it comes to signal-to-noise, > but they don't hold a candle to the Vim Use mailing list (this is > where I give a little praise for the moderators who do such an > excellent job of keeping spam off the list! Thanks, ya'll! > There are also a lot of smart folks here). So if you feel you're > doing something and there's got to be a better way, *ask* on the > list. Such as with your current query, you may get multiple > different solutions which give you different perspectives on how > people think about the problem. Try them out, try to understand > what they're doing, and a similar pattern may help you in another > situation. And as you can see, some of us are pretty prolix in > our responses, providing copious details :) > > -tim > > > > > > > > > -- > You received this message from the "vim_use" maillist. > Do not top-post! Type your reply below the text you are replying to. > For more information, visit http://www.vim.org/maillist.php > > -- View this message in context: http://old.nabble.com/search-for-occurrences-in-document-and-copy-it-tp28838398p28861268.html Sent from the Vim - General mailing list archive at Nabble.com. -- You received this message from the "vim_use" maillist. Do not top-post! Type your reply below the text you are replying to. For more information, visit http://www.vim.org/maillist.php
