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How do you extract a column from a multi-dimensional array?
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>>> import numpy as np
>>> A = np.array([[1,2,3,4],[5,6,7,8]])
>>> A
array([[1, 2, 3, 4],
[5, 6, 7, 8]])
>>> A[:,2] # returns the third columm
array([3, 7])
See also: "numpy.arange" and "reshape" to allocate memory
Example: (Allocating a ar...
How can we programmatically detect which iOS version is device running on? [duplicate]
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10 Answers
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How do I add the contents of an iterable to a set?
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231
You can add elements of a list to a set like this:
>>> foo = set(range(0, 4))
>>...
outline on only one border
...{
content: "\a0";
display: block;
padding: 2px 0;
line-height: 1px;
border-top: 1px dashed #000;
}
.element p {
padding: 0 10px;
}
<div class="element">
<p>Some content comes here...</p>
</div>
(Or see external demo.)
All sizes and colors ar...
创业公司如何实施敏捷开发 - 资讯 - 清泛网 - 专注C/C++及内核技术
...难题，很大的难题！
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How to iterate through range of Dates in Java?
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13 Answers
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What is the difference between & and && in Java?
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13 Answers
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Newline in markdown table?
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edited Jan 13 '15 at 20:41
answered Aug 25 '12 at 5:03
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Swift Beta performance: sorting arrays
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461
tl;dr Swift 1.0 is now as fast as C by this benchmark using the default release optimisation lev...