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How to delete an old/unused Data Model Version in Xcode

How can I delete an old Data Model in Xcode? The option is disabled on the menu. (The models I want to delete have not been released to the public - they are interim development models.) ...
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RESTful password reset

What is the proper way to structure a RESTful resource for resetting a password? 9 Answers ...
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How to elegantly rename all keys in a hash in Ruby? [duplicate]

... ages = { 'Bruce' => 32, 'Clark' => 28 } mappings = { 'Bruce' => 'Bruce Wayne', 'Clark' => 'Clark Kent' } ages.transform_keys(&mappings.method(:[])) #=> { 'Bruce Wayne' => 32, 'Clark Kent' => 28 } ...
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How do I uniquely identify computers visiting my web site?

... a way uniquely identify each computer which visits the web site I am creating. Does anybody have any advice on how to achieve this? ...
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How to automatically convert strongly typed enum into int?

The a::LOCAL_A is what the strongly typed enum is trying to achieve, but there is a small difference : normal enums can be converted into integer type, while strongly typed enums can not do it without a cast. ...
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Should unit tests be written for getter and setters?

... I would say no. @Will said you should aim for 100% code coverage, but in my opinion that's a dangerous distraction. You can write unit tests that have 100% coverage, and yet test absolutely nothing. Unit tests are there to test the behaviour of your code, in an expressive and meaningful way, ...
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In C# what is the difference between ToUpper() and ToUpperInvariant()?

In C#, what is the difference between ToUpper() and ToUpperInvariant() ? 6 Answers ...
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Difference between acceptance test and functional test?

... In my world, we use the terms as follows: functional testing: This is a verification activity; did we build a correctly working product? Does the software meet the business requirements? For this type of testing we have te...
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val-mutable versus var-immutable in Scala

Are there any guidelines in Scala on when to use val with a mutable collection versus using var with an immutable collection? Or should you really aim for val with an immutable collection? ...
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How big can a MySQL database get before performance starts to degrade

At what point does a MySQL database start to lose performance? 15 Answers 15 ...