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Is there a use-case for singletons with database access in PHP?
...y the users that can use that feature properly, confidence in the app lost etc.
– bogdancep
Oct 7 '18 at 14:39
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华为公司的新产品研发流程管理 - 项目管理 - 清泛网 - 专注C/C++及内核技术
...要信息或是已知的也或是可知的，只是没有人提出正确的问题或没有人做出正确的决策而已。
研究表明，如果一个公司较早做出取消或调整的决定，那么在那些没有投入市场的产品上所浪费的便要减少许多。一流公司在计...
Is there an API to get bank transaction and bank balance? [closed]
...vide both authentication API for several banks and REST-based transaction fetching endpoints.
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从估值5千万到一无所有 90后的他感觉梦境一场 - 资讯 - 清泛网 - 专注C/C++...
...O2O现在还没到风口。宠物行业的根本不在这里，这是源头问题。”与此同时，他对爱狗团的方向也进行了调整。夏军原本做的是宠物O2O，类似于美团的团购模式，将买家导入到线下的商户。而他放弃了O2O做法，现在做的模式不像...
PHP: Storing 'objects' inside the $_SESSION
...ve more complexity: network-attached memory, a stand-alone session server, etc.
Given all that, the more info you put in the session, the bigger the impact on performance (as Vinko points out). Also as Vinko points out, if your object isn't serializable, the session will misbehave. So, as a rule o...
通过 ulimit 改善系统性能 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...资源的条件下保证程序的运作，ulimit 是我们在处理这些问题时，经常使用的一种简单手段。ulimit 是一种 linux 系统的内键功能，它具有一套参数集，用于为由它生成的 shell 进程及其子进程的资源使用设置限制。本文将在后面的...
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
...可用mongodb集群（三）—— 深入副本集》搭建后还有两个问题没有解决：从节点每个上面的数据都是对数据库全量拷贝， 按照上一节中《搭建高可用mongodb集群（三）—— 深入副本集》搭建后还有两个问题没有解决：
从节点...
Lua简明教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...浮点数会慢（除非大于100,000,000,000,000），或是会有精度问题。
你可以以如下的方式表示数字，0x开头的16进制和C是很像的。
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num = 1024
num = 3.0
num = 3.1416
num = 314.16e-2
num = 0.31416E1
num = ...
Why do people say that Ruby is slow? [closed]
...Nginx, SQLite, MySQL, PostgreSQL, many parsing libraries, RMagick, TCP/IP, etc are C programs used by Ruby. Ruby provides the glue and the business logic.
What are your options as a Ruby
programmer if you want to deal with
this "slowness"?
Switch to a faster language. But that carries a c...
What is the difference between Google App Engine and Google Compute Engine?
...fferent events, which may include HTTP requests, changes in Cloud Storage, etc.
The biggest difference with App Engine is that functions are priced per 100 milliseconds, while App Engine's instances shut down only after 15 minutes of inactivity. Another advantage is that Cloud Functions execute imm...