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Matrix Transpose in Python
...t;> theArray = [['a','b','c'],['d','e','f'],['g','h','i']]
>>> zip(*theArray)
[('a', 'd', 'g'), ('b', 'e', 'h'), ('c', 'f', 'i')]
Python 3:
>>> [*zip(*theArray)]
[('a', 'd', 'g'), ('b', 'e', 'h'), ('c', 'f', 'i')]
...
如何抓住痛点做出让用户尖叫的产品 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...体验偏执狂”，真正的走进用户，感受到用户的痛点，并把产品做到极致。
以用户的痛点为中心的产品设计
一个产品的成长和成型，首先要以用户为中心去设计，在用户第一的前提下，必须是从用户的角度去思考分析问题的...
Fastest way to download a GitHub project
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When you are on a project page, you can press the 'Download ZIP' button which is located under the "Clone or Download" drop down:
This allows you to download the most recent version of the code as a zip archive.
If you aren't seeing that button, it is likely because you aren't on...
How to sort an array of hashes in ruby
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Simples:
array_of_hashes.sort_by { |hsh| hsh[:zip] }
Note:
When using sort_by you need to assign the result to a new variable: array_of_hashes = array_of_hashes.sort_by{} otherwise you can use the "bang" method to modify in place: array_of_hashes.sort_by!{}
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Pairs from single list
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My favorite way to do it:
from itertools import izip
def pairwise(t):
it = iter(t)
return izip(it,it)
# for "pairs" of any length
def chunkwise(t, size=2):
it = iter(t)
return izip(*[it]*size)
When you want to pair all elements you obviously might need a...
CentOS+Nginx+PHP+MySQL详细配置(图解) - PHP - 清泛IT论坛，有思想、有深度
...有写MySQL是怎么安装的，但是感觉好久没装MySQL，现在只把步骤贴出来，就不做过多的讲解了
#useradd mysql
#tar zxvf mysql-5.0.40.tar.gz
#cd mysql-5.0.40
#./configure --prefix=/usr/local/mysql
#make && make install
#/usr/local/mysql/bin/mysql_install_db --...
Performing Breadth First Search recursively
...our answer may contain a reference to this article (ibm.com/developerworks/aix/library/au-aix-stack-tree-traversal). It shows an implementation about what you wrote in the second part of your answer
– incud
Nov 10 '16 at 16:55
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Reverse engineering from an APK file to a project
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@sri just rename the apk file to zip and extract it, you will have the resource files in res folder
– Hoang Huynh
Nov 5 '13 at 3:58
8
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Element-wise addition of 2 lists?
...ator import add
>>> list( map(add, list1, list2) )
[5, 7, 9]
or zip with a list comprehension:
>>> [sum(x) for x in zip(list1, list2)]
[5, 7, 9]
Timing comparisons:
>>> list2 = [4, 5, 6]*10**5
>>> list1 = [1, 2, 3]*10**5
>>> %timeit from operator im...
RSA 算法是如何诞生的 - 创意 - 清泛网 - 专注C/C++及内核技术
...到了一些方案。尽管 Adleman 不情愿参与其中，他们还是会把结果拿给 Adleman，Adleman 的角色就是逐个击破这些方案，找出各种漏洞，给那两个头脑发热的人泼点冷水，免得他们走弯路。
三人走火入魔一般，吃饭聊、喝酒聊，甚至...