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How to deal with floating point number precision in JavaScript?
...st irritated that their programs don't work correctly with numbers like 1/10 without realizing that they wouldn't even blink at the same error if it occurred with 1/3.
If the first point really applies to you, use BigDecimal for JavaScript, which is not elegant at all, but actually solves the probl...
How to normalize an array in NumPy?
...mpy as np
from sklearn.preprocessing import normalize
x = np.random.rand(1000)*10
norm1 = x / np.linalg.norm(x)
norm2 = normalize(x[:,np.newaxis], axis=0).ravel()
print np.all(norm1 == norm2)
# True
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App Inventor 2 上传文件和图片到服务器教程 · App Inventor 2 中文网
...1.GotText(响应代码, 响应类型, 响应内容) {
if 响应代码 = 200 {
标签_状态.Text = join("上传成功！服务器返回：", 响应内容)
} else {
标签_状态.Text = join("上传失败，错误码：", 响应代码)
}
}
when Web客户端1.ErrorOccurred(错误信息)...
Why do some C# lambda expressions compile to static methods?
...
Action<string> withClosure = s => Console.WriteLine("My name is {0} and I am {1} years old", s, age);
Action<string> withoutClosure = s => Console.WriteLine("My name is {0}", s);
Console.WriteLine(withClosure.Method.IsStatic);
Console.WriteLine(withoutClosure.Method.IsStatic);
T...
What is the difference between shallow copy, deepcopy and normal assignment operation?
...rint id(c) == id(d) # True - d is the same object as c
print id(c[0]) == id(d[0]) # True - d[0] is the same object as c[0]
Using a shallow copy:
d = copy.copy(c)
print id(c) == id(d) # False - d is now a new object
print id(c[0]) == id(d[0]) # True - d[0] is the same obje...
Custom ImageView with drop shadow
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answered Dec 10 '10 at 2:43
Kevin CoppockKevin Coppock
125k4242 gold badges247247 silver badges262262 bronze badges
...
Why is there no xrange function in Python3?
...pple 2.7.2 64-bit:
In [37]: %timeit collections.deque((x for x in xrange(10000000) if x%4 == 0), maxlen=0)
1 loops, best of 3: 1.05 s per loop
Now, python.org 3.3.0 64-bit:
In [83]: %timeit collections.deque((x for x in range(10000000) if x%4 == 0), maxlen=0)
1 loops, best of 3: 1.32 s per loop
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What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++?
... Functions can be called in either order
**/
return 0;
}
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How do you calculate the average of a set of circular data? [closed]
...
102
Compute unit vectors from the angles and take the angle of their average.
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Replacing NAs with latest non-NA value
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divibisan
7,90699 gold badges2626 silver badges4343 bronze badges
answered Oct 12 '11 at 5:32
Dirk EddelbuettelDir...