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Can someone explain mappedBy in JPA and Hibernate?
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By specifying the @JoinColumn on both models you don't have a two way relationship. You have tw...
MySQL select one column DISTINCT, with corresponding other columns
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12 Answers
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How to create a custom string representation for a class object?
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280
Implement __str__() or __repr__() in the class's metaclass.
class MC(type):
def __repr__(sel...
Ruby on Rails: How can I revert a migration with rake db:migrate?
...nt to revert.
eg. if you want to revert a migration with file name 3846656238_create_users.rb
rake db:migrate:down VERSION=3846656238
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Square retrofit server mock for testing
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Mock Retrofit 2.0 Requests for Testing
As the old mechanisms like creating MockClient class and implementing it from Client are not working anymore with Retrofit 2.0, here I describe a new way of doing that. All what you need to do now is...
What happens when a computer program runs?
...r on some systems (see Billy O'Neal's answer below for more details on Win32).
Other systems can be very different. DOS, for instance, ran in real mode, and its memory allocation when running programs looked much differently:
+-----------+ top of memory
| extended | above the high memory area,...
How to show current year in view?
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<%= Time.current.year %>
http://pleac.sourceforge.net/pleac_ruby/datesandtimes.html
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Is the Scala 2.8 collections library a case of “the longest suicide note in history”? [closed]
...la collections library re-implementation which is coming in the imminent 2.8 release. Those familiar with the library from 2.7 will notice that the library, from a usage perspective, has changed little. For example...
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Regular expression for exact match of a string
...tch two passwords with regular expression. For example I have two inputs "123456" and "1234567" then the result should be not match (false). And when I have entered "123456" and "123456" then the result should be match (true).
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C: What is the difference between ++i and i++?
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21 Answers
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