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how to convert array values from string to int?
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edited Apr 23 '19 at 10:46
Rahul
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a...
TCP 的那些事儿（上） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...《TCP/IP 详解 卷1：协议》（当然，你也可以去读一下RFC793以及后面N多的RFC）。另外，本文我会使用英文术语，这样方便你通过这些英文关键词来查找相关的技术文档。
之所以想写这篇文章，目的有三个，
一个是想锻炼一下...
What does the “at” (@) symbol do in Python?
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331
An @ symbol at the beginning of a line is used for class, function and method decorators.
Rea...
How would you implement an LRU cache in Java?
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edited Aug 10 '10 at 16:36
answered Dec 23 '09 at 15:43
H...
What is the Ruby (spaceship) operator?
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369
Perl was likely the first language to use it. Groovy is another language that supports it. Bas...
Finding the index of elements based on a condition using python list comprehension
... of a list.
>>> import numpy
>>> a = numpy.array([1, 2, 3, 1, 2, 3])
>>> a
array([1, 2, 3, 1, 2, 3])
>>> numpy.where(a > 2)
(array([2, 5]),)
>>> a > 2
array([False, False, True, False, False, True], dtype=bool)
>>> a[numpy.where(a > 2...
How to print a percentage value in python?
...age floating point precision type:
>>> print "{0:.0%}".format(1./3)
33%
If you don't want integer division, you can import Python3's division from __future__:
>>> from __future__ import division
>>> 1 / 3
0.3333333333333333
# The above 33% example would could now be w...
How can I get the intersection, union, and subset of arrays in Ruby?
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3 Answers
3
Active
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Transpose/Unzip Function (inverse of zip)?
... use the special * operator.
>>> zip(*[('a', 1), ('b', 2), ('c', 3), ('d', 4)])
[('a', 'b', 'c', 'd'), (1, 2, 3, 4)]
The way this works is by calling zip with the arguments:
zip(('a', 1), ('b', 2), ('c', 3), ('d', 4))
… except the arguments are passed to zip directly (after being co...
How do you perform a left outer join using linq extension methods
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edited Dec 3 '19 at 9:30
B--rian
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