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\d is less efficient than [0-9]
...probably more efficient to use a range or digit specifier than a character set.
5 Answers
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Right query to get the current number of connections in a PostgreSQL DB
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select * from
(select count(*) used from pg_stat_activity) q1,
(select setting::int res_for_super from pg_settings where name=$$superuser_reserved_connections$$) q2,
(select setting::int max_conn from pg_settings where name=$$max_connections$$) q3;
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Count rows with not empty value
In a Google Spreadsheet: How can I count the rows of a given area that have a value? All hints about this I found up to now lead to formulas that do count the rows which have a not empty content (including formula), but a cell with
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How to put Google Maps V2 on a Fragment using ViewPager
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By using this code we can setup MapView anywhere, inside any ViewPager or Fragment or Activity.
In the latest update of Google for Maps, only MapView is supported for fragments. MapFragment & SupportMapFragment doesn't work. I might be wrong but ...
How do I integrate Ajax with Django applications?
...Finally, include this in the HEAD of your html:
$('a').bjax();
For more settings, checkout demo here:
Bjax Demo
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Fast way to get image dimensions (not filesize)
I'm looking for a fast way to get the height and width of an image in pixels. It should handle at least JPG, PNG and TIFF, but the more the better. I emphasize fast because my images are quite big (up to 250 MB) and it takes soooo long to get the size with ImageMagick's identify because it obv...
Shell one liner to prepend to a file
This is probably a complex solution .
32 Answers
32
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How to expand/collapse a diff sections in Vimdiff?
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:e to reload the files if they have been modified outside of vimdiff.
:set noscrollbind -> temporarily disable simultaneous scrolling on both buffers, reenable by :set scrollbind and scrolling.
Most of what you asked for is folding: vim user manual's chapter on folding. Outside of diffs I s...
IIS - 401.3 - Unauthorized
...t to a folder on my file system and added index.html to the folder. I have set the port to 85 for this site. When I try to access http://localhost:85/index.html , I get the following error message:
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String slugification in Python
I am in search of the best way to "slugify" string what "slug" is , and my current solution is based on this recipe
10 An...