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The relationship could not be changed because one or more of the foreign-key properties is non-nulla

... You should delete old child items thisParent.ChildItems one by one manually. Entity Framework doesn't do that for you. It finally cannot decide what you want to do with the old child items - if you want to throw them away or if you want to keep and assign them to other parent enti...
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Scala vs. Groovy vs. Clojure [closed]

Can someone please explain the major differences between Scala, Groovy and Clojure. I know each of these compiles to run on the JVM but I'd like a simple comparison between them. ...
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Add leading zeroes to number in Java? [duplicate]

... many locales that do NOT use Arabic numerals 0-9 (oddly enough, Arabic is one of those locales). I had a bug where my code was crashing on Android when the phone was set in Arabic because I was formatting a date string using String.format("%04d-%02d-%02d", year, month, day), thinking that would pro...
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How to pass optional arguments to a method in C++?

...ave multiple optional parameters I should either implement all of them or none at all? I cannot choose to use 1 optional parameter but not the rest? – Gerard Apr 24 '14 at 10:19 ...
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CSS two divs next to each other

...lign, as some of the other answers have suggested. I am not criticizing anyone, as we're all here to help each other, so beside my nit picking, thank you M.N. for your contributions to this community. – Mussser Jul 17 '14 at 16:37 ...
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Cannot use a CONTAINS or FREETEXT predicate on table or indexed view because it is not full-text ind

... - you don't already have full-text search index on the table as only one full-text search index allowed on a table - a unique index exists on the table. The index must be based on single-key column, that does not allow NULL. - full-text catalog exists. You have to specify full-text c...
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How to fix org.hibernate.LazyInitializationException - could not initialize proxy - no Session

...ubProcessModel.getElement()); when you are still in active session. And one last thing. A friendly advice. You have something like this in your method: for (Model m : modelList) { if (m.getModelType().getId() == 3) { model = m; break; } } Please insted of this code just...
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Python list subtraction operation

... if item not in yset] which abuses nested listcomps to cache the yset as a one-liner. A slightly less ugly one-liner solution that performs adequately would be to use list(itertools.filterfalse(set(y).__contains__, x)) because the argument to filterfalse is only constructed once. ...
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How to convert a String to its equivalent LINQ Expression Tree?

...g a parser (using Expression under the hood) isn't hugely taxing - I wrote one similar (although I don't think I have the source) in my train commute just before xmas... share | improve this answer ...
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SplitView like Facebook app on iPhone

I want to create an iPhone app that uses a navigation scene similar to the one pictured in the link 10 Answers ...