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How do I implement an Objective-C singleton that is compatible with ARC?

How do I convert (or create) a singleton class that compiles and behaves correctly when using automatic reference counting (ARC) in Xcode 4.2? ...
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How do I mock an open used in a with statement (using the Mock framework in Python)?

...rite('something') ... <mock.Mock object at 0x...> >>> file_handle = mock_open.return_value.__enter__.return_value >>> file_handle.write.assert_called_with('something') share | ...
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Cleaning up old remote git branches

I work from two different computers (A and B) and store a common git remote in the dropbox directory. 9 Answers ...
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Debug.Assert vs Exception Throwing

I've read plenty of articles (and a couple of other similar questions that were posted on StackOverflow) about how and when to use assertions, and I understood them well. But still, I don't understand what kind of motivation should drive me to use Debug.Assert instead of throwing a plain excep...
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How does internationalization work in JavaScript?

...environment’s current locale. This function is implementation-dependent, and it is permissible, but not encouraged, for it to return the same thing as toString. Every localization method defined in the spec is defined as "implementation-dependent", which results in a lot of inconsistencies. In t...
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Using Razor, how do I render a Boolean to a JavaScript variable?

...u may also want to try: isFollowing: '@(Model.IsFollowing)' === '@true' and an ever better way is to use: isFollowing: @Json.Encode(Model.IsFollowing) share | improve this answer | ...
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Unique combination of all elements from two (or more) vectors

... this maybe what you are after > expand.grid(a,b) Var1 Var2 1 ABC 2012-05-01 2 DEF 2012-05-01 3 GHI 2012-05-01 4 ABC 2012-05-02 5 DEF 2012-05-02 6 GHI 2012-05-02 7 ABC 2012-05-03 8 DEF 2012-05-03 9 GHI 2012-05-03 10 ABC 2012-05-04 11...
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JavaScript - get the first day of the week from current date

...get the first day of the week. For example: today is the 11th of November, and a Thursday; and I want the first day of this week, which is the 8th of November, and a Monday. I need the fastest method for MongoDB map function, any ideas? ...
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How to detect if URL has changed after hash in JavaScript

... This, as I understand, works only for the change of the part after the # sign (hence the event name)? And not for full URL change, as seems to be implied by the question's title. – NPC May 27 '14 at 21:53...
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ng-repeat :filter by single field

I have an array of products that I'm repeating over using ng-repeat and am using 12 Answers ...