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How do I calculate the normal vector of a line segment?
...dy, -dx).
Note that no division is required, and so you're not risking dividing by zero.
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How to set username and password for SmtpClient object in .NET?
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In JavaScript, is returning out of a switch statement considered a better practice than using break?
...out your question. I think you're looking for a general "best practice" guideline, but in the specific example you gave, the best practice is return {1:"One",2:"Two,3:"Three"}[opt];. If you need the default then it would be var o={1:"One",2:"Two,3:"Three"}; return opt in o?o[opt]:"";
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How to see which plugins are making Vim slow?
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Best answer! Helped me to identify the slowest plugin that made me angry at every vim start. Thanx :)
– kovpack
Jul 27 '16 at 19:11
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Set folder browser dialog start location
...ult ShowDialog()
{
var shellType = Type.GetTypeFromProgID("Shell.Application");
var shell = Activator.CreateInstance(shellType);
var folder = shellType.InvokeMember(
"BrowseForFolder", BindingFlags.InvokeMethod, null,
...
What does it mean when git says a file “needs update”?
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Finding the path of the program that will execute from the command line in Windows
... +1 ! I never knew this could have been a part of Windows and so didn't look in that direction! :)
– Zabba
Oct 23 '10 at 6:45
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How can I initialize an ArrayList with all zeroes in Java?
...ed by nCopies is immutable, so creating a new ArrayList is probably a good idea.
– aioobe
Apr 8 '11 at 21:16
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When should I use File.separator and when File.pathSeparator?
...and File.pathSeparator then:
File.pathSeparator is used to separate individual file paths in a list of file paths. Consider on windows, the PATH environment variable. You use a ; to separate the file paths so on Windows File.pathSeparator would be ;.
File.separator is either / or \ that is used t...
What does “%.*s” mean in printf?
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You can use an asterisk (*) to pass the width specifier/precision to printf(), rather than hard coding it into the format string, i.e.
void f(const char *str, int str_len)
{
printf("%.*s\n", str_len, str);
}
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