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How should equals and hashcode be implemented when using JPA and Hibernate
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When you say "reload" @ChssPly76 you mean doing a refresh()? How does your entity, which obeys the Set contract end up in the wrong bucket (assuming you have a good enough hashcode implementation).
– non sequitor
Oct 28 '09...
@ variables in Ruby on Rails
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@variables are called instance variables in ruby. Which means you can access these variables in ANY METHOD inside the class. [Across all methods in the class]
Variables without the @ symbol are called local variables, which means you can access these local variables within THAT ...
MySQL - Using COUNT(*) in the WHERE clause
...count() with where. now see why ....
where is not same as having , having means you are working or dealing with group and same work of count , it is also dealing with the whole group ,
now how count it is working as whole group
create a table and enter some id's and then use:
select count(*) f...
Difference between @OneToMany and @ElementCollection?
...erred over the proprietary Hibernate annotation CollectionOfElements.
It means that the collection is not a collection of entities, but a collection of simple types (Strings, etc.) or a collection of embeddable elements (class annotated with @Embeddable).
It also means that the elements are compl...
Scrollview vertical and horizontal in android
...me is better to write some xml using the existing components. What does it mean "static content"? I use button and images.
– Redax
Jun 4 '11 at 16:47
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Building a notification system [closed]
...ed to notify certain users about changes. So it's per-user notifications.. meaning that if there were 100 users involved, you generate 100 notifications.
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'Contains()' workaround using Linq to Entities?
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Correct me if I am wrong. but this means when the passed collection (filter) is an empty set it will basically result in all the data cause it just returned the query param. I was expecting it to filter all value, is there a way to do this?
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Can a foreign key be NULL and/or duplicate?
...hat is all an FK is by definition. Null by definition is not a value. Null means that we do not yet know what the value is.
Let me give you a real life example. Suppose you have a database that stores sales proposals. Suppose further that each proposal only has one sales person assigned and one cli...
Do DOM tree elements with ids become global variables?
...ou (or any other library code in your project) might want to use.
It also means that these elements are visible as global-like variables. Luckily in this case any real global var or function declarations in your code shadow them, so you don't need to worry so much about naming here, but if you try ...
What are all the differences between src and data-src attributes?
...rent.
The src attribute is defined in HTML specs, and it has a functional meaning.
The data-src attribute is just one of the infinite set of data-* attributes, which have no defined meaning but can be used to include invisible data in an element, for use in scripting (or styling).
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