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理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...印变量"sample"的值为 "Foo" 4. __exit__()方法被调用 with真正强大之处是它可以处理异常。可能你已经注意到Sample类的__exit__方法有三个参数- val, type 和 trace。 这些参数在异常处理中相当有用。我们来改一下代码,看看具体如何工作的...
What blocks Ruby, Python to get Javascript V8 speed? [closed]
...
Performance doesn't seem to be a major focus of the core Python developers, who seem to feel that "fast enough" is good enough, and that features that help programmers be more productive are more important than features that help computers run code faster.
Indeed, however, t...
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
...像最近一次事务ID(最新的节点会胜出)
他的选举过程大致如下:
? 得到每个服务器节点的最后操作时间戳。每个mongodb都有oplog机制会记录本机的操作,方便和主服务器进行对比数据是否同步还可以用于错误恢复。
? 如果集群...
How to specify test directory for mocha?
...modules/mocha/bin/mocha $(find api -name '*-test.js') --compilers js:babel-core/register
– kobe
Aug 17 '16 at 1:41
1
...
Linux环境离线安装docker&docker-compose - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...er默认运行目录为/var/lib/docker/,可以根据自身服务器存储大小自定义设置运行目录;
2)可以自定义设置获取docker镜像的私有仓库;
3)可以自定义设置拉取镜像时使用的镜像站点,在中国大陆,由于网络延迟或带宽限制,直接...
Node.js setting up environment specific configs to be used with everyauth
...ion file. You can parse these options with optparse-js.
Now you have some core modules that are depending on this config file. When you write them as such:
var Workspace = module.exports = function(config) {
if (config) {
// do something;
}
}
(function () {
this.methodOnWorks...
初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...ch_size和daemon_memcached_w_batch_size,这两个选项对性能影响较大,简单点说就是控制事务提交的频率,MySQL的缺省值均为1,也就是说每次都提交,这主要是从安全性考虑的,大家可以依照自己的情况来调整。
差不多了,此时Memcached...
百度牵手安联高瓴涉足在线保险 又晚了还是刚刚好? - 资讯 - 清泛网 - 专注...
...领域,支付宝与微信支付早已厮杀开来,百度钱包才开始大力推广。
就在(11月26日),百度、安联保险、高瓴资本于上海召开发布会,宣布三方将联合发起成立一家互联网保险公司,这也被认为是百度联合中信银行成立百信银行...
What is the iBeacon Bluetooth Profile
...onfigure an iOS device with a specific advertisement packet when using the Core Bluetooth GATT APIs? I couldn't find the option. You can define custom UUIDs for Services and Characteristics but not for the advertisement.
– miguel
Nov 26 '13 at 4:04
...
check if jquery has been loaded, then load it if false
...f being able to use $(document).ready(function...
http://neighborhood.org/core/sample/jquery/append-to-head.htm
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