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MongoDB副本集详解 优于以往的主从模式 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...一半，如果已经小于一半了所有节点保持只读状态。
3 搭建副本集集群
每个虚拟机都使用如下的配置文件启动实例:
dbpath =/home/lihuilin/mongodata
smallfiles =true
replSet =mvbox
然后在任意一台虚拟机登陆mongo,输入如下...
Recreating a Dictionary from an IEnumerable
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330
If you're using .NET 3.5 or .NET 4, it's easy to create the dictionary using LINQ:
Dictionary...
How to collapse all methods in Xcode?
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edited Oct 12 '15 at 11:37
answered Feb 15 '11 at 14:24
J...
Correct use of Multimapping in Dapper
...plit points, dapper assumes you are trying to split up the result set into 3 objects. First starts at the beginning, second starts at CustomerId, third at CustomerName.
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improve this answer
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Python - List of unique dictionaries
... the list
In Python2.7
>>> L=[
... {'id':1,'name':'john', 'age':34},
... {'id':1,'name':'john', 'age':34},
... {'id':2,'name':'hanna', 'age':30},
... ]
>>> {v['id']:v for v in L}.values()
[{'age': 34, 'id': 1, 'name': 'john'}, {'age': 30, 'id': 2, 'name': 'hanna'}]
In Python3
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Localization and internationalization, what's the difference?
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233
Internationalization (i18n)the process of changing your software so that it isn't hardwired ...
Add a new line in file?
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edited Apr 15 '13 at 22:45
answered Aug 19 '10 at 3:10
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Installing SetupTools on 64-bit Windows
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Apparently (having faced related 64- and 32-bit issues on OS X) there is a bug in the Windows installer. I stumbled across this workaround, which might help - basically, you create your own registry value HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Python\PythonCore\2.6...
When I catch an exception, how do I get the type, file, and line number?
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389
import sys, os
try:
raise NotImplementedError("No error")
except Exception as e:
exc_...