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What is the purpose and use of **kwargs?

...uments"): >>> def print_keyword_args(**kwargs): ... # kwargs is a dict of the keyword args passed to the function ... for key, value in kwargs.iteritems(): ... print "%s = %s" % (key, value) ... >>> print_keyword_args(first_name="John", last_name="Doe") first_name...
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You need to use a Theme.AppCompat theme (or descendant) with this activity

... The reason you are having this problem is because the activity you are trying to apply the dialog theme to is extending ActionBarActivity which requires the AppCompat theme to be applied. Update: Extending AppCompatActivity would also have this prob...
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Is it good practice to use the xor operator for boolean checks? [closed]

...or when it makes sense in the context of boolean checks because of its conciseness. I much prefer to write 13 Answers ...
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Why does range(start, end) not include end?

... pass Could you see that if range() went up to exactly len(li) that this would be problematic? The programmer would need to explicitly subtract 1. This also follows the common trend of programmers preferring for(int i = 0; i < 10; i++) over for(int i = 0; i <= 9; i++). If you are calling...
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What is the best Java email address validation method? [closed]

... Apache Commons is generally known as a solid project. Keep in mind, though, you'll still have to send a verification email to the address if you want to ensure it's a real email, and that the owner wants it used on your site. EDIT: There ...
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What does the exclamation mark do before the function?

... JavaScript syntax 101. Here is a function declaration: function foo() {} Note that there's no semicolon: this is just a function declaration. You would need an invocation, foo(), to actually run the function. Now, when we add the seemingly innocuous...
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How to unsubscribe to a broadcast event in angularJS. How to remove function registered via $on

I have registered my listener to a $broadcast event using $on function 10 Answers 10 ...
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Read an Excel file directly from a R script

...http://strawberryperl.com/). There are various caveats, and alternatives, listed on the R wiki page. The only reason I see not to do this directly is that you may want to examine the spreadsheet to see if it has glitches (weird headers, multiple worksheets [you can only read one at a time, although...
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Why are all fields in an interface implicitly static and final?

... An interface can't have behavior or state because it is intended to specify only an interaction contract, no implementation details. 'No behavior' is enforced by not allowing method/constructor bodies or static/instance initializing blocks. 'No state' is enforced by only allowi...
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How to get root access on Android emulator?

... share | improve this answer | follow | answered Oct 17 '16 at 23:39 JRaymondJRaymond ...