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MySQL combine two columns into one column
...f the values to numbers. If a value does not start with a digit, then the converted value is 0.
So try this:
select concat(column1, column2)
Two ways to add a space:
select concat(column1, ' ', column2)
select concat_ws(' ', column1, column2)
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Read/write to Windows registry using Java
...ccessing the private methods in the java.util.prefs.Preferences class. The internals of this class are complicated, but the class itself is very easy to use.
For example, the following code obtains the exact windows distribution from the registry:
String value = WinRegistry.readString (
WinReg...
GridCtrl 控件FAQ - C/C++ - 清泛网 - 专注C/C++及内核技术
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l 也可以设定某个单元格为只读
BOOL CGridCtrl::SetItemState(int nRow, int nCol, UINT state)
一般需配合使用UINT CGridCtrl::GetItemState(int nRow, int nCol) const
比如将单元格（1，1）设为只读
CGridCtrlObject.SetItemState(1,1, m_Grid.GetItemState(1,1) | GVIS_READON...
How can I pass a member function where a free function is expected?
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There isn't anything wrong with using function pointers. However, pointers to non-static member functions are not like normal function pointers: member functions need to be called on an object which is passed as an implicit argument to the function. The signature of your me...
How to calculate the SVG Path for an arc (of a circle)
...or the original question, since they have more mathematical pseudocode for converting between the two parameterizations (which I didn't realize when I first wrote this answer).
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How to set a bitmap from resource
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I got the issue. I was trying to convert vector drawable into bitmap. So here is the cod to convert vector drawable into bitmap.
– Er.Rohit Sharma
Mar 20 '18 at 12:12
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What is the difference between “long”, “long long”, “long int”, and “long long int” in C++?
...++ and have some questions about the long data type. In Java, to hold an integer greater than 2 32 , you would simply write long x; . However, in C++, it seems that long is both a data type and a modifier.
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What is the difference between an int and an Integer in Java and C#?
...g about a particular type of programmer knowing the difference between an int and an Integer in Java/C# (Object-Oriented Programming Languages).
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How can I get the full object in Node.js's console.log(), rather than '[Object]'?
...would occur with DOM objects, for example. Stringify will throw an "Error: Converting circular structure to JSON".
– Ignacio Lago
Jan 17 '14 at 16:47
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What is the size of column of int(11) in mysql in bytes?
What is the size of column of int(11) in mysql in bytes?
11 Answers
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