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How to detect the currently pressed key?
...r);
}
public class KeyMessageFilter : IMessageFilter
{
private const int WM_KEYDOWN = 0x0100;
private const int WM_KEYUP = 0x0101;
private bool m_keyPressed = false;
private Dictionary<Keys, bool> m_keyTable = new Dictionary<Keys, bool>();
public Dictionary<Key...
AppInventor2中的二进制数据以什么样的形式传递？字节列表、字节数组是什么...
... void PublishByteArray(String Topic, Object ByteArray, boolean RetainFlag, int QoS) {
final String funcName = "PublishByteArray";
resetErrorInfo(funcName);
if (!IsConnec...
Restore the state of std::cout after manipulating it
...the problem by not pushing formats onto streams. Push the format and data into a temporary stringstream variable, then print
– Mark Sherred
Feb 2 '18 at 2:47
...
Android: checkbox listener
...
if(((CompoundButton) view).isChecked()){
System.out.println("Checked");
} else {
System.out.println("Un-Checked");
}
}
});
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The case against checked exceptions
...
I think I read the same Bruce Eckel interview that you did - and it's always bugged me. In fact, the argument was made by the interviewee (if this is indeed the post you're talking about) Anders Hejlsberg, the MS genius behind .NET and C#.
http://www.artima...
How to remove first 10 characters from a string?
...
Substring is probably what you want, as others pointed out. But just to add another option to the mix...
string result = string.Join(string.Empty, str.Skip(10));
You dont even need to check the length on this! :) If its less than 10 chars, you get an empty string.
...
Logical operators for boolean indexing in Pandas
...ou say
(a['x']==1) and (a['y']==10)
You are implicitly asking Python to convert (a['x']==1) and (a['y']==10) to boolean values.
NumPy arrays (of length greater than 1) and Pandas objects such as Series do not have a boolean value -- in other words, they raise
ValueError: The truth value of an...
What is the point of function pointers?
I have trouble seeing the utility of function pointers. I guess it may be useful in some cases (they exist, after all), but I can't think of a case where it's better or unavoidable to use a function pointer.
...
What is the difference between procedural programming and functional programming? [closed]
...eries of sequential steps. (There's a way of transforming sequential logic into functional logic called continuation passing style.)
As a consequence, a purely functional program always yields the same value for an input, and the order of evaluation is not well-defined; which means that uncertain v...
Why does SIGPIPE exist?
...lue's in the fact that SIGPIPE kills you by default - it's not designed to interrupt a system call, it's designed to terminate your program! If you're able to handle the signal in a signal handler, you could just as well handle the return code of write.
– Nicholas Wilson
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