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How to convert a PIL Image into a numpy array?
...ect back and forth to a numpy array so I can do some faster pixel by pixel transformations than PIL's PixelAccess object would allow. I've figured out how to place the pixel information in a useful 3D numpy array by way of:
...
【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...由
tos |= RTO_ONLINK; //此时目的地址和下一跳必然在本地网络，设置RTO_ONLINK表示后续查找时与目的地址直连，而不用通过gateway
connected = 0;
}
if (ipv4_is_multicast(daddr)) { //如果是多播，同样控制信息中不存在的话，获取setsockopt配...
How to put the legend out of the plot
... plt.legend(bbox_to_anchor=(1,0), loc="lower right",
bbox_transform=fig.transFigure, ncol=3)
l6 = plt.legend(bbox_to_anchor=(0.4,0.8), loc="upper right")
Details about how to interpret the 4-tuple argument to bbox_to_anchor, as in l4, can be found in this question. The mode="expand...
Looking for a clear definition of what a “tokenizer”, “parser” and...
...whitespace makes sense in the lexer. If you are building source-to-source transformation tools, you cannot lose comments because they must reappear in the transformed text. So ALWAYS removing comments is wrong; we can argue about how one manages to preserve whitespace. ...
– ...
What is the difference between syntax and semantics in programming languages?
... valid C statements. But what do they mean? Is it even valid to attempt to transform these statements into an executable sequence of instructions? These questions are at the heart of semantics.
Consider the ++ operator in the first statement. First of all, is it even valid to attempt this?
If x i...
pyplot axes labels for subplots
...l_prop = dict()
pylab.text(x,y,label,rotation=rotation,
transform=fig.transFigure,
ha=ha,va=va,
**label_prop)
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How can I sort arrays and data in PHP?
...erent fields that shouldn't cancel out each other's work.
The Schwartzian transform
The Schwartzian transform, also referred to as the decorate-sort-undecorate idiom, effects a stable sort with an inherently unstable sorting algorithm.
First, you decorate each array element with another array com...
How do I tar a directory of files and folders without including the directory itself?
...
Have a look at --transform/--xform, it gives you the opportunity to massage the file name as the file is added to the archive:
% mkdir my_directory
% touch my_directory/file1
% touch my_directory/file2
% touch my_directory/.hiddenfile1
% tou...
Using margin:auto to vertically-align a div
...
In the >= IE9 age, position: absolute; top: 50%; transform: translateY(-50%); is also feasible and quite popular... (unlike top:50%;margin: - $halfHeight you don't have to know the height in advance...)
– Frank Nocke
Apr 9 '17 at 10:15...
What does the “Just” syntax mean in Haskell?
...s proven to be an effective way to do it.
Maybe as a Functor
The idea of transforming one type to another one such that operations on the old type can also be transformed to work on the new type is the concept behind the Haskell type class called Functor, which Maybe a has a useful instance of.
F...