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Is there shorthand for returning a default value if None in Python? [duplicate]
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123
return "default" if x is None else x
try the above.
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Changing column names of a data frame
...k it was asked for data.frame, not data.table
– Helix123
Apr 16 '15 at 19:15
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Batch script: how to check for admin rights
...ons inadequate.
)
pause >nul
Available here, if you're lazy: https://dl.dropbox.com/u/27573003/Distribution/Binaries/check_Permissions.bat
Explanation
NET SESSION is a standard command used to "manage server computer connections. Used without parameters, [it] displays information...
Git error: “Host Key Verification Failed” when connecting to remote repository
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Fun fact, running sudo ssh-keygen -R domain.com can rename your existing known_hosts file to be known_hosts.old, and create a copy that is only readable by root. (-rw------- root root) You can easily chown this back to the ap...
Fragment lifecycle - which method is called upon show / hide?
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Similar to activity lifecycle, Android calls onStart() when fragment becomes visible. onStop()...
How to make a valid Windows filename from an arbitrary string?
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This isn't more efficient, but it's more fun :)
var fileName = "foo:bar";
var invalidChars = System.IO.Path.GetInvalidFileNameChars();
var cleanFileName = new string(fileName.Where(m => !invalidChars.Contains(m)).ToArray<char>());
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How to suppress scientific notation when printing float values?
...s really what you want? I don't: >>> print('{:f}'.format(0.000000123)) 0.000000
– duality_
May 22 '18 at 10:06
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How to get the current time as datetime
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You could also use NSDateFormatter's convenience method, e.g.,
func printTimestamp() {
let timestamp = NSDateFormatter.localizedStringFromDate(NSDate(), dateStyle: .MediumStyle, timeStyle: .ShortStyle)
print(timestamp)
}
printTimestamp() // Prints "Sep 9, 2014, 4:30 AM"
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Java: parse int value from a char
...n be converted into int(0 to 9), e.g., '5'-'0' gives int 5.
String str = "123";
int a=str.charAt(1)-'0';
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Best Practice: Software Versioning [closed]
...best practice how to version a software you develop in your spare time for fun, but nevertheless will be used by some people? I think it's necessary to version such software so that you know about with version one is talking about (e.g. for bug fixing, support, and so on).
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