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In Python how should I test if a variable is None, True or False

... Don't fear the Exception! Having your program just log and continue is as easy as: try: result = simulate(open("myfile")) except SimulationException as sim_exc: print "error parsing stream", sim_exc else: if result: print "result pass" else: print...
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How can I tell if I'm running in 64-bit JVM or 32-bit JVM (from within a program)?

... the HotSpot FAQ: When writing Java code, how do I distinguish between 32 and 64-bit operation? There's no public API that allows you to distinguish between 32 and 64-bit operation. Think of 64-bit as just another platform in the write once, run anywhere tradition. However, if you'd like to write c...
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Which Android IDE is better - Android Studio or Eclipse? [closed]

I'm starting to develop for Android. Which IDE should I use - Android Studio or Eclipse sdk? I would like to know which one is better. ...
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Class with single method — best approach?

...ation of helper methods that would otherwise lie around causing redundancy and maintenance hell. They're very easy to use, no instantiation, no disposal, just fire'n'forget. I guess this was my first unwitting attempt at creating a service oriented architecture - lots of stateless services that just...
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Java Annotations

... in Java? I have this fuzzy idea of them as somewhere in between a comment and actual code. Do they affect the program at run time? ...
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conditional unique constraint

...onstraint like this. The difference is, you'll return false if Status = 1 and Count > 0. http://msdn.microsoft.com/en-us/library/ms188258.aspx CREATE TABLE CheckConstraint ( Id TINYINT, Name VARCHAR(50), RecordStatus TINYINT ) GO CREATE FUNCTION CheckActiveCount( @Id INT ) RETURNS INT...
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How to create a tag with Javascript?

...he head rather than the body. This was tested in IE (7-9), Firefox, Opera and Chrome: var css = 'h1 { background: red; }', head = document.head || document.getElementsByTagName('head')[0], style = document.createElement('style'); head.appendChild(style); style.type = 'text/css'; if (styl...
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How to switch between hide and view password

Is there a clever way to let the user switch between hide and view password in an android EditText? A number of PC based apps let the user do this. ...
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How to fix “Referenced assembly does not have a strong name” error?

...e to sign a thirp-party is to Disassemble the assembly using ildasm.exe and save the intermediate language (IL): ildasm /all /out=thirdPartyLib.il thirdPartyLib.dll Rebuild and sign the assembly: ilasm /dll /key=myKey.snk thirdPartyLib.il Fixing Additional References The above steps work ...
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Difference between 'self' and 'total' in Chrome CPU Profile of JS

What is the difference between the 'self' and 'total' columns in the Chrome CPU profiling of JS code? 2 Answers ...