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How to determine whether a given Linux is 32 bit or 64 bit?
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Try uname -m. Which is short of uname --machine and it outputs:
x86_64 ==> 64-bit kernel
i686 ==> 32-bit kernel
Otherwise, not for the Linux kernel, but for the CPU, you type:
cat /proc/cpuinfo
or:
grep flags /proc/cpuinfo
Under "flags" parameter, you will see various values...
Google maps API V3 - multiple markers on exact same spot
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Take a look at OverlappingMarkerSpiderfier.
There's a demo page, but they don't show markers which are exactly on the same spot, only some which are very close together.
But a real life example with markers on the exact same spot can be seen on http://www.ejw.de/ejw-vor-ort/ ...
How to create a video from images with FFmpeg?
... the part of the audio that you want before joining it: Cutting the videos based on start and end time using ffmpeg
ffmpeg -i in.mp3 -ss 03:10 -to 03:30 -c copy out.mp3
TODO: learn to cut and concatenate multiple audio files into the video without intermediate files, I'm pretty sure it's possibl...
What is the most efficient way to loop through dataframes with pandas? [duplicate]
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Pandas is based on NumPy arrays.
The key to speed with NumPy arrays is to perform your operations on the whole array at once, never row-by-row or item-by-item.
For example, if close is a 1-d array, and you want the day-over-day percen...
Match whitespace but not newlines
... would match white spaces but not of a new line character.
(?:(?!\n)\s)
DEMO
If you want to add carriage return also then add \r with the | operator inside the negative lookahead.
(?:(?![\n\r])\s)
DEMO
Add + after the non-capturing group to match one or more white spaces.
(?:(?![\n\r])\s)+
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Xcode build failure “Undefined symbols for architecture x86_64”
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UPD
Apple requires to use arm64 architecture. Do not use x32 libraries in your project
So the answer below is not correct anymore!
Old answer
The new Xcode 5.1 sets the architecture armv7,armv7s,and arm64 as default.
And sometimes the error "build ...
How to make rpm auto install dependencies
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No, this will not work unless libtest1-1.0-1.x86_64.rpm is in a repository elsewhere, or both packages are specified on the command line like "rpm -i" would require. I just verified this on yum 3.4.3 (Fedora 18). Transcript here showing that it goes to the updates repo for ...
How to detect reliably Mac OS X, iOS, Linux, Windows in C preprocessor? [duplicate]
..._WIN32__) || defined(__NT__)
//define something for Windows (32-bit and 64-bit, this part is common)
#ifdef _WIN64
//define something for Windows (64-bit only)
#else
//define something for Windows (32-bit only)
#endif
#elif __APPLE__
#include <TargetConditionals.h>
...
Why does volatile exist?
... @curiousguy it did not decide wrongly. It made the correct deduction based on the information given. If you fail to mark something volatile, the compiler is free to assume that it is not volatile. That's what the compiler does when optimizing code. If there is more information, namely, that sa...
SQL - Update multiple records in one query
...update query each time I preferred this,
UPDATE mst_users
SET base_id = CASE user_id
WHEN 78 THEN 999
WHEN 77 THEN 88
ELSE base_id END WHERE user_id IN(78, 77)
78,77 are the user Ids and for those user id I need to update the base_id 999 and 88 respectively.This works for ...