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List comprehension vs. lambda + filter
... list comprehension only accesses local variables. If you are using Python 3.x the list comprehension runs in a separate function so it will also be accessing value through a closure and this difference won't apply.
The other option to consider is to use a generator instead of a list comprehension:...
Unit testing of private methods [duplicate]
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answered Sep 9 '10 at 12:53
Mike SeymourMike Seymour
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Why java.io.File doesn't have a close() method?
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answered Jan 20 '11 at 20:37
biziclopbiziclop
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vs2008编译boost详细步骤 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
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（2）Spirit，LL parser framework，用C++代码直接表达EBNF；
（3）Graph，图组件和算法；
（4）Lambda，在调用的地方定义短小匿名的函数对象，很实用的functional功能；
（5）concept check，检查泛型编程中的concept；
（6）Mpl，用模板实现...
Simple example of threading in C++
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user276648
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answered Jun 27 '12 at 15:31
MasterMasticMasterM...
How do I create a SHA1 hash in ruby?
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386
require 'digest/sha1'
Digest::SHA1.hexdigest 'foo'
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How to convert image to byte array
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Pranay RanaPranay Rana
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Regular expression for a string containing one word but not another
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KobiKobi
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What's the safest way to iterate through the keys of a Perl hash?
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answered Aug 6 '08 at 13:22
John SiracusaJohn Siracusa
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Return two and more values from a method
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def sumdiff(x, y)
return x+y, x-y
end
#=> nil
sumdiff(3, 4)
#=> [7, -1]
a = sumdiff(3,4)
#=> [7, -1]
a
#=> [7, -1]
a,b=sumdiff(3,4)
#=> [7, -1]
a
#=> 7
b
#=> -1
a,b,c=sumdiff(3,4)
#=> [7, -1]
a
#=> 7
b
#=> -1
c
#=> nil
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