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What do I have to do to get Core Data to automatically migrate models?

...otherwise you will have to create a new version for each change. I think what I will do is that I will keep all of the changed files and then once I get ready to deploy my update I'll delete all the in-between files and just deploy with the oldest and latest models. UPDATE (15/07/2011): Thanks...
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JavaScript for…in vs for

Do you think there is a big difference in for...in and for loops? What kind of "for" do you prefer to use and why? 23 Answe...
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RSpec controller testing - blank response.body

...rs your controller tests, not the outcome of template rendering — that's what view specs are for. However, if you wish to make your controller specs render templates as the app normally would, use the render_views directive: describe YourController do render_views ... end ...
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How do I find out with jQuery if an element is being animated?

... Great, only now it's a duplicate of the accepted answer. BTW what does it mean community approved? – amosmos Aug 25 '15 at 16:40 ...
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Django set default form values

...lank value for this field, the initial value is lost. So you do not obtain what is expected by a default behaviour. The default behaviour is : the value that validation process will take if data argument do not contain any value for the field. To implement that, a straightforward way is to combine...
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What is the best way to find the users home directory in Java?

...oof solution on Windows is hard, because Windows has a shifting concept of what the home directory means. If user.home isn't good enough for you I would suggest choosing a definition of home directory for windows and using it, getting the appropriate environment variable with System.getenv(String). ...
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How to add facebook share button on my website?

...ion: 'Top 3 reasons why you should care about your finance', description: "What happens when you don't take care of your finances? Just look at our country -- you spend irresponsibly, get in debt up to your eyeballs, and stress about how you're going to make ends meet. The difference is that you don...
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How can I select rows with most recent timestamp for each key value?

... more info here) but I think also other engines. In case it's not obvious, what this does is sort the table by sensor ID and timestamp (newest to oldest), and then returns the first row (i.e. latest timestamp) for each unique sensor ID. In my use case I have ~10M readings from ~1K sensors, so tryin...
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What is the difference between an annotated and unannotated tag?

... tags usually have pretty useless messages (can it say more than the name? What for?). Unfortunately, this top-voted answer does not mention this difference. – Piotr Findeisen Jul 30 '15 at 14:39 ...
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Fill remaining vertical space with CSS using display:flex

... What if we want section to have a 100% height? – Paul Totzke Jul 13 '15 at 2:20 ...