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How to parse a string into a nullable int
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54
@Chris, the compiler doesn't like your inline if statement (These types are not compatible: 'int' : 'null'). I had to amend it to: return In...
Java Hashmap: How to get key from value?
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34 Answers
34
Active
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Should I use multiplication or division?
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Python:
time python -c 'for i in xrange(int(1e8)): t=12341234234.234 / 2.0'
real 0m26.676s
user 0m25.154s
sys 0m0.076s
time python -c 'for i in xrange(int(1e8)): t=12341234234.234 * 0.5'
real 0m17.932s
user 0m16.481s
sys 0m0.048s
multiplication is 33% faster...
How to split strings across multiple lines in CMake?
...: 2.8.9
Debian Wheezy-backports: 2.8.11
Debian Jessy (2015): 3.0.2
Ubuntu 14.04 (LTS): 2.8.12
Ubuntu 15.04 : 3.0.2
Mac OSX : cmake-3 available through Homebrew, Macports and Fink
Windows: cmake-3 available through Chocolatey
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Why doesn't list have safe “get” method like dictionary?
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24
Python doesn't allow monkeypatching builtin types like list
– Imran
Feb 26 '11 at 7:32
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OnInitUpdate、OnUpdate、OnDraw与OnPaint - C/C++ - 清泛网 - 专注C/C++及内核技术
...产生WM_PAINT消息，这时OnDraw 也被间接调用。
OnUpdate 是CView提供的一个方法，一般当文档修改时调用，应用程序框架在CView::OnInitialUpdate 和CDocument::UpdateAllViews 的默认实现中都会调用。
OnUpdate，OnUpdate的默认实现是通过Invalidate产...
Python: changing value in a tuple
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184
First you need to ask, why you want to do this?
But it's possible via:
t = ('275', '54000', '0...
Docker - a way to give access to a host USB or serial device?
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edited Oct 17 '19 at 14:23
answered Jun 15 '14 at 16:48
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Is it possible to specify your own distance function using scikit-learn K-Means Clustering?
...if verbose >= 2:
print "kmeans: av |X - nearest centre| = %.4g" % avdist
if (1 - delta) * prevdist <= avdist <= prevdist \
or jiter == maxiter:
break
prevdist = avdist
for jc in range(k): # (1 pass in C)
c = np.where( xtoc...
How do I prevent Android taking a screenshot when my app goes to the background?
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answered Mar 22 '12 at 12:48
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