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How to check if string input is a number? [duplicate]
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Simply try converting it to an int and then bailing out if it doesn't work.
try:
val = int(userInput)
except ValueError:
print("That's not an int!")
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The JPA hashCode() / equals() dilemma
There have been some discussions here about JPA entities and which hashCode() / equals() implementation should be used for JPA entity classes. Most (if not all) of them depend on Hibernate, but I'd like to discuss them JPA-implementation-neutrally (I am using EclipseLink, by the way).
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Android: open activity without save into the stack
...he new Activity from being added to the history stack.
NB: As @Sam points out, you can use i.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY); instead. There is no functional difference.
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Installing PG gem on OS X - failure to build native extension
... Its not libpg-dev; Its a Q not a P! It took me 10 minutes to figure that out the hard way.
– tir38
May 12 '14 at 1:13
1
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Android Gallery on Android 4.4 (KitKat) returns different URI for Intent.ACTION_GET_CONTENT
... from new sdks uri. Also it is a shame google made this kind of change without proper documantation and announcement.
– user65721
Nov 17 '13 at 3:11
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Java; String replace (using regular expressions)?
...// Syntax error in the replacement text (unescaped $ signs?)
} catch (IndexOutOfBoundsException ex) {
// Non-existent backreference used the replacement text
}
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Python Logging (function name, file name, line number) using a single file
...ell as the line number (within the code) where I send a message to the log output. Finally, since this application comprises of many files, I want to create a single log file so that I can better understand the control flow of the application.
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Recursion in Angular directives
There are a couple of popular recursive angular directive Q&A's out there, which all come down to one of the following solutions:
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Does C# have extension properties?
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For the moment it is still not supported out of the box by Roslyn compiler ...
Until now, the extension properties were not seen as valuable enough to be included in the previous versions of C# standard. C# 7 and C# 8.0 have seen this as proposal champion but it wa...
catch exception that is thrown in different thread
... Thread thread = new Thread(() => SafeExecute(() => Test(0, 0), out exception));
thread.Start();
thread.Join();
Console.WriteLine(exception);
Console.ReadLine();
}
private static void SafeExecute(Action test, out Exception excep...