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How do you validate a URL with a regular expression in Python?
...n and have been beating my head against the following problem for the past 3 days.
12 Answers
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String.format() to format double in java
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answered Feb 3 '11 at 11:04
David TangDavid Tang
84.3k2828 gold badges156156 silver badges144144 bronze badges
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What's the difference between eval, exec, and compile?
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3 Answers
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How to access the ith column of a NumPy multidimensional array?
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>>> test[:,0]
array([1, 3, 5])
Similarly,
>>> test[1,:]
array([3, 4])
lets you access rows. This is covered in Section 1.4 (Indexing) of the NumPy reference. This is quick, at least in my experience. It's certainly much quicker tha...
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...ies(df.Letter.values,index=df.Position).to_dict()
Out[9]: {1: 'a', 2: 'b', 3: 'c', 4: 'd', 5: 'e'}
Speed comparion (using Wouter's method)
In [6]: df = pd.DataFrame(randint(0,10,10000).reshape(5000,2),columns=list('AB'))
In [7]: %timeit dict(zip(df.A,df.B))
1000 loops, best of 3: 1.27 ms per loo...
In c# is there a method to find the max of 3 numbers?
Like Math.Max but takes 3 or params of int?
10 Answers
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Is there a performance gain in using single quotes vs double quotes in ruby?
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$ ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.0.0]
$ cat benchmark_quotes.rb
# As of Ruby 1.9 Benchmark must be required
require 'benchmark'
n = 1000000
Benchmark.bm(15) do |x|
x.report("assign single") { n.times do; c...
在vc中使用xtremetoolkit界面库-----安装及环境配置 - C/C++ - 清泛网 - 专...
...当然是配置发开环境了：
我使用的是vc6.0+xtremetoolkitPro15.3.1
以下链接是xtremetoolkitPro15.3.1免费下载地址：（其中还包含了注册机，解压Crack文件下的Keygen.zip就可以得到），
http://pan.baidu.com/s/1pJvfy0F
我因为之前安装的是一个绿色...
Generate 'n' unique random numbers within a range [duplicate]
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396
If you just need sampling without replacement:
>>> import random
>>> random...
How do I parallelize a simple Python loop?
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13 Answers
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