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What is the formal difference in Scala between braces and parentheses, and when should they be used?

...+ _) // invalid, A* vararg parameter However, there’s more you need to know to better grasp these rules. Increased compile checking with parens The authors of Spray recommend round parens because they give increased compile checking. This is especially important for DSLs like Spray. By using pa...
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Android Studio quick documentation always “fetching documentation”

...mentation for some Android class popped up. No idea, where it got it from. Now I'm installing the Doc package back, hoping it will fix the fetch times, thank you for idea. – Ped7g Apr 12 '17 at 12:19 ...
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LEFT OUTER joins in Rails 3

...In Rails 3, this is the only way to have true control over your joins and know exactly what's going on. – Joshua Pinter Jan 29 '18 at 16:26 add a comment  |...
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Who is calling the Java Thread interrupt() method if I'm not?

...ly should not call System.exit(). (Your application does not necessarily know why it was interrupted, and it certainly does not know if there are other threads that need to be interrupted by the framework.) On the other hand, if your code is not designed to run under the control of some framewor...
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Most efficient method to groupby on an array of objects

...ailed to understand how in the world does it work starting from ...result. Now I can't sleep because of that. – user3307073 Mar 29 '19 at 9:26 ...
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How to correctly save instance state of Fragments in back stack?

...e also been coding my apps with this expected behavior for quite some time now. – Ricardo Mar 28 '15 at 23:32 1 ...
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SecItemAdd and SecItemCopyMatching returns error code -34018 (errSecMissingEntitlement)

...wever, that doesn't actually appear to help. That means that there's no known workaround at this time other than relaunching the app. The issue appears to be related to memory pressure, so perhaps being more aggressive in handling memory warnings may alleviate the problem https://forums...
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Android : Check whether the phone is dual SIM

After a lot of research on forums, now I know that there is no way to find IMSI or SIM serial number for both the SIM cards in a dual SIM phone (except for contacting the manufacturer). Now my changed question is, can we at all detect that the phone has two SIMs? I believe it can be detected with so...
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How to delete all rows from all tables in a SQL Server database?

...ase to send to someone else in an email but my 'empty' database backup was now 14 MB? What did I do wrong? – Ben Dec 8 '14 at 15:27 ...
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How to reference style attributes from a drawable?

...possible to live without if you have multiple themes within an app. Right now I have to make three drawable XMLs for each of custom button types! – Stephan Henningsen Oct 27 '16 at 10:52 ...