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What does “%.*s” mean in printf?
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See: http://www.cplusplus.com/reference/clibrary/cstdio/printf/
.* The precision is not specified in the format string, but as an additional integer value argument preceding the argument that has to be formatted.
s String of c...
Working with Enums in android
...e of 2014 that advises against the use of enums in an android application. http://developer.android.com/training/articles/memory.html#Overhead
I quote:
Be aware of memory overhead
Be knowledgeable about the cost and overhead of the language and
libraries you are using, and keep this info...
Find running median from a stream of integers
...n optimized generator version with the indexable skiplist code inlined):
http://code.activestate.com/recipes/576930-efficient-running-median-using-an-indexable-skipli/
http://code.activestate.com/recipes/577073 .
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Rails where condition using NOT NIL
...t's easy:
Foo.includes(:bar).where.not(bars: {id: nil})
See also:
http://guides.rubyonrails.org/active_record_querying.html#not-conditions
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How to get the seconds since epoch from the time + date output of gmtime()?
...re two ways, depending on your original timestamp:
mktime() and timegm()
http://docs.python.org/library/time.html
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Ruby Regexp group matching, assign variables on 1 line
...ils"
puts "W: #{webframework} , C: #{colon}, R: #{rest}"
(Take a look at http://ruby-doc.org/core-2.1.1/Regexp.html , search for "local variable").
Note:
As pointed out in a comment, I see that there is a similar and earlier answer to this question by @toonsend (https://stackoverflow.com/a/214124...
Fastest method of screen capturing on Windows
...e code is available and my article explains the general technique. Look at http://blog.nektra.com/main/2013/07/23/instrumenting-direct3d-applications-to-capture-video-and-calculate-frames-per-second/
Respect to your questions related to performance,
DirectX should be faster than GDI except when y...
python numpy ValueError: operands could not be broadcast together with shapes
...s not conflict with anything.
For more information on broadcasting rules: http://docs.scipy.org/doc/numpy/user/basics.broadcasting.html
(Please note that if X and y are of type numpy.matrix, then asterisk can be used as matrix multiplication. My recommendation is to keep away from numpy.matrix, it...
How to import existing *.sql files in PostgreSQL 8.4?
...; done
Here's the documentation of the psql application (thanks, Frank): http://www.postgresql.org/docs/current/static/app-psql.html
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How to specify font attributes for all elements on an html web page?
... the beginning of my stylesheet rather than linking it separately, saves a HTTP request. It will help you set consistent styles across browsers because it zeroes everything: the only styles will be ones that you write.
– Chris Cox
Mar 31 '14 at 0:18
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