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What are OLTP and OLAP. What is the difference between them?
...ized by relatively low volume of transactions. Queries are often very complm>ex m> and involve aggregations. For OLAP systems a response time is an effectiveness measure. OLAP applications are widely used by Data Mining techniques. In OLAP database there is aggregated, historical data, stored in multi-di...
What is the best place for storing uploaded images, SQL database or disk file system? [closed]
...users is allowed to upload images such as avatar. Or users can create blog content and put some images from tm>ex m>t editor. This kind of images is difficult to predict the size. Users can upload big images just for small content by resize the view size but not resize the image size.
By ignoring item...
Why / when would it be appropriate to override ToString?
...r any language that implements it)
SOAP
etc...
Note: Unless you're using m>PHP m> because, herp-derp, there's a function for that ::snicker::
Reason 2 - ToString() is not enough:
I have yet to see a language that implements this at the core but I have seen and used variations of this approach in the ...
Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...（如Windows m>Ex m>plorer扩展开发）。
环境
shell编程跟java、m>php m>编程一样，只要有一个能编写代码的文本编辑器和一个能解释执行的脚本解释器就可以了。
OS
当前主流的操作系统都支持shell编程，本文档所述的shell编程是指Linux下的sh...
How do I immediately m>ex m>ecute an anonymous function in m>PHP m>?
...
For m>PHP m>7: see Yasuo Ohgaki's answer: (function() {echo 'Hi';})();
For previous versions: the only way to m>ex m>ecute them immediately I can think of is
call_user_func(function() { echo 'm>ex m>ecuted'; });
...
Why does pylint object to single character variable names?
...ll=\"#1BB76E\"/\u003e\u003c/svg\u003e\u003c/a\u003e",
contentPolicyHtml: "User contributions licensed under \u003ca href=\"https://stackoverflow.com/help/licensing\"\u003ecc by-sa\u003c/a\u003e \u003ca href=\"https://stackoverflow.com/legal/content-policy\"\u003e(content policy)...
m>PHP m> function overloading
Coming from C++ background ;)
How can I overload m>PHP m> functions?
10 Answers
10
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Sequelize Unknown column '*.createdAt' in 'field list'
...define('project', {
title: Sequelize.STRING,
description: Sequelize.Tm>EX m>T
},{
timestamps: false
})
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How do you Encrypt and Decrypt a m>PHP m> String?
...s question made this mistake; as do many cryptography libraries written in m>PHP m>.
You should avoid implementing your own cryptography, and instead use a secure library written by and reviewed by cryptography m>ex m>perts.
Update: m>PHP m> 7.2 now provides libsodium! For best security, update your systems to us...