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Grep regex NOT containing string
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answered May 2 '12 at 10:10
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MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...xit
-h [ --host ] arg mongo host to connect to ( <set name>/s1,s2 for sets)
--port arg server port. Can also use --host hostname:port
--ipv6 enable IPv6 support (disabled by default)
-u [ --username ] arg username
-p [ --password ] arg ...
How to add new item to hash
...eate the hash:
hash = {:item1 => 1}
Add a new item to it:
hash[:item2] = 2
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Splitting a list into N parts of approximately equal length
... equal parts? For example, if the list has 7 elements and is split it into 2 parts, we want to get 3 elements in one part, and the other should have 4 elements.
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How to fix error with xml2-config not found when installing PHP from sources?
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All you need to do instal install package libxml2-dev for example:
sudo apt-get install libxml2-dev
On CentOS/RHEL:
sudo yum install libxml2-devel
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How to select .NET 4.5.2 as a target framework in Visual Studio
I have installed .NET Framework 4.5.2 on Windows 8.1. But in Visual Studio 2013 I do not see the .NET Framework 4.5.2 option (see screenshot). How do I target my project for .NET 4.5.2?
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Import error: No module name urllib2
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As stated in the urllib2 documentation:
The urllib2 module has been split across several modules in Python 3 named urllib.request and urllib.error. The 2to3 tool will automatically adapt imports when converting your sources to Python 3.
So yo...
Predicate Delegates in C#
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A predicate is a function that returns true or false. A predicate delegate is a reference to a...
What is the reason for having '//' in Python? [duplicate]
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527
In Python 3, they made the / operator do a floating-point division, and added the // operator t...