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“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
...ON DUPLICATE KEY UPDATE.
If you use INSERT IGNORE, then the row won't actually be inserted if it results in a duplicate key. But the statement won't generate an error. It generates a warning instead. These cases include:
Inserting a duplicate key in columns with PRIMARY KEY or UNIQUE constrain...
How do I view all commits for a specific day?
...:00" --until="2013-11-13 00:00" & would also work if you have gitk installed.
– HelloGoodbye
Mar 4 '16 at 12:50
6
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Difference between add(), replace(), and addToBackStack()
What is the main difference between calling these methods:
9 Answers
9
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Center a position:fixed element
...in: 5% auto; for this. Without position: fixed; it centers fine horizontally, but not vertically. After adding position: fixed; , it's even not centering horizontally.
...
Regular expression to match DNS hostname or IP Address?
...o be escaped with \.
ValidHostnameRegex is valid as per RFC 1123. Originally, RFC 952 specified that hostname segments could not start with a digit.
http://en.wikipedia.org/wiki/Hostname
The original specification of
hostnames in RFC
952,
mandated that labels could not start
with a d...
How can I concatenate two arrays in Java?
...files where some of the facilities like those mentioned by Antti are not available.
– kvn
Feb 7 '11 at 15:46
4
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How do I associate file types with an iPhone application?
...t -application:didFinishLaunchingWithOptions: in the app delegate is only called if your app was not backgrounded when it's opened to handle a file.
– memmons
Oct 10 '11 at 18:32
3...
CDHtmlDialog的基本使用（C++调用JS函数的实现） - C/C++ - 清泛网 - 专注IT技能提升
...
return hResult;
}
最终运行效果如下：
工程代码点此下载。
ATL COM开发入门（二）（ActiveX/COM组件回调JS） - C/C++ - 清泛网 - 专注C/C++及内核技术
...参见《ATL创建的ActiveX(COM组件)实现JS回调》。
源码点此下载，如有问题请点此。
ATL COM ActiveX 入门 JS回调
CDHtmlDialog的基本使用（C++调用JS函数的实现） - C/C++ - 清泛网 - 专注IT技能提升
...
return hResult;
}
最终运行效果如下：
工程代码点此下载。