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搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...高可用的mongodb集群：
首先确定各个组件的数量，mongos 3个， config server 3个，数据分3片 shard server 3个，每个shard 有一个副本一个仲裁也就是 3 * 2 = 6 个，总共需要部署15个实例。这些实例可以部署在独立机器也可以部署在一台机...
How does UTF-8 “variable-width encoding” work?
...points in it that you need 4 bytes to store them all. That's what the UTF-32 encoding does. Yet the UTF-8 encoding somehow squeezes these into much smaller spaces by using something called "variable-width encoding".
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swift case falling through
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370
Yes. You can do so as follows:
var testVal = "hello"
var result = 0
switch testVal {
case "o...
Convert datetime to Unix timestamp and convert it back in python
I have dt = datetime(2013,9,1,11) , and I would like to get a Unix timestamp of this datetime object.
11 Answers
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Android gradle: buildtoolsVersion vs compileSdkVersion
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answered Jul 2 '14 at 4:53
Xavier DucrohetXavier Ducrohet
26.9k55 gold badges8181 silver badges6262 bronze badges
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What is the preferred syntax for initializing a dict: curly brace literals {} or the dict() function
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243
Curly braces. Passing keyword arguments into dict(), though it works beautifully in a lot of sce...
How do I specify a single test in a file with nosetests?
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answered Aug 20 '13 at 10:19
michaeljosephmichaeljoseph
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socket.emit() vs. socket.send()
...arlesCharles
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Suppress properties with null value on ASP.NET Web API
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132
In the WebApiConfig:
config.Formatters.JsonFormatter.SerializerSettings =
ne...