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MySQL - length() vs char_length()
... in two bytes. Or UTF-8, where the number of bytes varies. For example:
select length(_utf8 '€'), char_length(_utf8 '€')
--> 3, 1
As you can see the Euro sign occupies 3 bytes (it's encoded as 0xE282AC in UTF-8) even though it's only one character.
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Understanding the Event Loop
... of queues of stuff that needs doing and every "tick" of the event loop it selects one, removes it from the queue, and runs it.
A key thing to understand is that node relies on the OS for most of the heavy lifting. So incoming network requests are actually tracked by the OS itself and when node is ...
No Main() in WPF?
... in visual studio. Use the navigation bar > Method drop down list > select Main (greyed out). This takes you to App.g.i.cs.
– P.Brian.Mackey
Apr 6 '18 at 15:58
add a c...
Eclipse ctrl+right does nothing
...sing Ctrl + Right to move to the next word and Ctrl + Shift + Right to select the next word. But on eclipse nothing happens, the cursor stays in the same place.
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How do you test private methods with NUnit?
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This should be the selected answer, as it is the only one which actually answers the question.
– bavaza
Dec 10 '13 at 16:04
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Are there good reasons not to use an ORM? [closed]
...honestly it isn't. Using an ORM tool means the tool/developer can insert, select, update or delete whatever he or she wants. Stored procedures provide a lot more security, especially in environments when dealing with client data. I think this is the biggest reason to consider. Security.
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How can I write a regex which matches non greedy? [duplicate]
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The non-greedy ? works perfectly fine. It's just that you need to select dot matches all option in the regex engines (regexpal, the engine you used, also has this option) you are testing with. This is because, regex engines generally don't match line breaks when you use .. You need to tell ...
How to reset a single table in rails?
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rails console
irb(main):028:0> ActiveRecord::Base.connection.execute("SELECT SETVAL('accounts_id_seq', 1)")
Where the accounts in the accounts_id_seq is the name of the table.
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Two submit buttons in one form
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For i18n purposes it might be better to use the selected answer.
– Robin Green
Nov 29 '12 at 16:08
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BIO与NIO、AIO的区别(这个容易理解) - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...IO是否完成，那么为什么说是阻塞的呢？因为此时是通过select系统调用来完成的，而select函数本身的实现方式是阻塞的，而采用select函数有个好处就是它可以同时监听多个文件句柄，从而提高系统的并发性！
异步非阻塞IO:在此...