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Complete Working Sample of the Gmail Three-Fragment Animation Scenario?

...le,move]. Notice that fillAfter(true) is not used anywhere. View2 is right_of View1 and View3 is right_of View2 Having set these rules RelativeLayout takes care of everything else. Animations alter the margins (on move) and [width,height] on scale To access each child (so that you can inflat...
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How to use the TextWatcher class in Android?

...gered again, starting an infinite loop. You should then add like a boolean _ignore property which prevent the infinite loop. Exemple: new TextWatcher() { boolean _ignore = false; // indicates if the change was made by the TextWatcher itself. @Override public void afterTextC...
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When should I use nil and NULL in Objective-C?

...ntions this, but if you dig into objc.h, you'll find the line #define nill __DARWIN_NULL. – gkb0986 Oct 25 '13 at 3:12 1 ...
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The tilde operator in Python

...s operator.invert. To support this operator in your own class, give it an __invert__(self) method. >>> import operator >>> class Foo: ... def __invert__(self): ... print 'invert' ... >>> x = Foo() >>> operator.invert(x) invert >>> ~x invert Any ...
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Python Sets vs Lists

... as lists, except for their immutability. Iterating >>> def iter_test(iterable): ... for i in iterable: ... pass ... >>> from timeit import timeit >>> timeit( ... "iter_test(iterable)", ... setup="from __main__ import iter_test; iterable = set(range(1...
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Replacing some characters in a string with another character

...zLMN and I want to replace all the occurrences of x , y , and z with _ . 5 Answers ...
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Can't find the PostgreSQL client library (libpq)

... $ sudo su $ env ARCHFLAGS="-arch x86_64" gem install pg Building native extensions. This could take a while... Successfully installed pg-0.11.0 1 gem installed Installing ri documentation for pg-0.11.0... Installing RDoc documentation for pg-0.11.0... WORKE...
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Referring to the null object in Python

...t;> NoneType = type(None) >>> id(None) 10748000 >>> my_none = NoneType() >>> id(my_none) 10748000 >>> another_none = NoneType() >>> id(another_none) 10748000 >>> def function_that_does_nothing(): pass >>> return_value = function_that_...
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TypeScript typed array usage

... You have an error in your syntax here: this._possessions = new Thing[100](); This doesn't create an "array of things". To create an array of things, you can simply use the array literal expression: this._possessions = []; Of the array constructor if you want to se...
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Are nested try/except blocks in python a good programming practice?

...EAFP. Personally, I prefer to avoid nesting when it's not necessary: def __getattribute__(self, item): try: return object.__getattribute__(item) except AttributeError: pass # fallback to dict try: return self.dict[item] except KeyError: raise Attrib...