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Checking from shell script if a directory contains files
...e)"
fi
Note: no difference between an empty directory and a non-existing one (and even when the provided path is a file).
There is a similar alternative and more details (and more examples) on the 'official' FAQ for #bash IRC channel:
if (shopt -s nullglob dotglob; f=(*); ((${#f[@]})))
then
ec...
Get records with max value for each group of grouped SQL results
... and also the problems of returning multiple rows when there are more than one with the same maximum value (as the other answers would do)
Note: This is a mysql-only solution. All other databases I know will throw an SQL syntax error with the message "non aggregated columns are not listed in the gro...
A valid provisioning profile for this executable was not found for debug mode
...
It could be because your iphone is not recognized by the provisioning portal.
Solution:
1) In Xcode, Goto --> Build --> clean all targets.
2) In "Groups & Files" -->Target --> expand it --> right click your app and select Clean "yo...
How to display multiple notifications in android
I am receiving only one notification and if there comes another notification, it replaces the previous one and here is my code
...
Why does the JVM still not support tail-call optimization?
...pecification doesn't require that this transformation be made. Presumably, one reason it is not a requirement is that, in general, the transformation can't be made statically in an object-oriented language. Instead, the transformation from tail-recursive function to simple loop must be done dynamica...
Display lines number in Stack Trace for .NET assembly in Release mode
...nerated .pdb file with the assembly.
Implemented with the comment below:
One other thing to check is in the "Package/Publish Web" section that the "Exclude generated debug symbols" checkbox is also unchecked
share
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TypeError: got multiple values for argument
...nd width arguments).
This is easy to see in the example, but of course if one mixes up the arguments at call, it may not be easy to debug:
# misplaced height and width
color_box(20, 30, color="green")
Here, color is assigned 20, then args=[30] and color is again assigned "green".
...
What are best practices for REST nested resources?
As far as I can tell each individual resource should have only one canonical path. So in the following example what would good URL patterns be?
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How can we match a^n b^n with Java regex?
One of the archetypal non- regular languages is:
3 Answers
3
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Draw a perfect circle from user's touch
...ic Computer Vision technique for detecting a shape is the Hough Transform. One of the nice things about the Hough Transform is that it is very tolerant of partial data, imperfect data and noise. Using Hough for a circle:
http://en.wikipedia.org/wiki/Hough_transform#Circle_detection_process
Given th...