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Can I use Objective-C blocks as properties?
...al places use a type def
typedef void(^MyCompletionBlock)(BOOL success, NSError *error);
@property (nonatomic) MyCompletionBlock completion;
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How to sort a list of objects based on an attribute of the objects?
...u might want to do the following, then:
try: import operator
except ImportError: keyfun= lambda x: x.count # use a lambda if no operator module
else: keyfun= operator.attrgetter("count") # use operator since it's faster than lambda
ut.sort(key=keyfun, reverse=True) # sort in-place
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How to create a CPU spike with a bash command
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edited Jan 21 '17 at 20:05
answered Jan 21 '17 at 17:2
How to impose maxlength on textArea in HTML using JavaScript
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@brian Yup, you're correct. Thanks for spotting my error, fixed!
– Dana Woodman
Apr 28 '11 at 22:14
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What is the difference between quiet NaN and signaling NaN?
...e exit status:
g++ -ggdb3 -O0 -Wall -Wextra -pthread -std=c++11 -pedantic-errors -o blow_up.out blow_up.cpp -lm -lrt
./blow_up.out
echo $?
Output:
FE_ALL_EXCEPT snan + 1.0f
feenableexcept qnan + 1.0f
Floating point exception (core dumped)
136
Note that this behaviour only happens with -O0 in G...
Java using enum with switch statement
... ...
break;
}
}
You may find it more helpful / less error prone to write a custom valueOf implementation that takes your integer values as an argument to resolve the appropriate enum value and lets you centralize your bounds checking.
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OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
... C++ code below is able to detect a sheet of paper in the image:
void find_squares(Mat& image, vector<vector<Point> >& squares)
{
// blur will enhance edge detection
Mat blurred(image);
medianBlur(image, blurred, 9);
Mat gray0(blurred.size(), CV_8U), gray;
v...
Compiling Java 7 code via Maven
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– Alfonso Nishikawa
Apr 8 '14 at 7:05
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How to sort git tags by version string order of form rc-X.Y.Z.W?
...played ref has fewer components than <N>, the command aborts with an error.
For git tag, when unspecified, defaults to %(refname:strip=2).
Update Git 2.12 (Q1 2017)
See commit c026557, commit b178464, commit 51acfa9, commit b823166, commit 109064a, commit 0c1b487, commit 9ffda48, commit ...
What is the pythonic way to detect the last element in a 'for' loop?
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answered Oct 27 '09 at 12:05
BartekBartek
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