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Python __str__ versus __unicode__
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__str__() is the old method -- it returns bytes. __unicode__() is the new, preferred method --...
Running a cron job at 2:30 AM everyday
How to configure a cron job to run every night at 2:30? I know how to make it run at 2, but not 2:30.
6 Answers
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转：postfix安装Q&A - 更多技术 - 清泛网 - 专注C/C++及内核技术
...安装成功postfix（地址在这里http://www.extmail.org/forum/archive/2/0510/563.html）。现在把我安装过程中遇到的问题及解决方法提供给大家，以方便新手。高手就不要看了
说明一下：Q代表安装过程中遇到的问题，或者是日志中出现的...
Calculating Pearson correlation and significance in Python
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You can have a look at scipy.stats:
from pydoc import help
from scipy.stats.stats import pear...
对外网用户的squid代理+认证 - 更多技术 - 清泛网 - 专注C/C++及内核技术
对外网用户的squid代理+认证FreeBSD6 2+Squid2 6架设对外网用户的squid代理+认证服务器架设一台代理，提供对外网用户的代理请求，端口仍然为3128，加入Squid认证功能。 FreeBSD6.2+Squid2.6架设“对外网用户的squid代理+认证”服务器架设...
How do I draw a shadow under a UIView?
...hat I should use CGContextSetShadow() to draw the shadow, but the Quartz 2D programming guide is a little vague:
16 Answe...
How do I get bit-by-bit data from an integer value in C?
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edited Jan 9 '16 at 4:21
Ashish Ahuja
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answer...
How do I implement IEnumerable
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huysentruitw
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answered Jul 2 '12 at 15:45
Monroe ThomasMo...
Oracle Differences between NVL and Coalesce
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COALESCE is more modern function that is a part of ANSI-92 standard.
NVL is Oracle specific, it was introduced in 80's before there were any standards.
In case of two values, they are synonyms.
However, they are implemented differently.
NVL always evaluates both arguments, whil...
Big-O for Eight Year Olds? [duplicate]
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25 Answers
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