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What is the difference between the | and || or operators?
I have always used || (two pipes) in OR expressions, both in C# and PHP. Occasionally I see a single pipe used: | . What is the difference between those two usages? Are there any caveats when using one over the other or are they interchangeable?
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Difference between Activity and FragmentActivity
I was working on fragments and came across two things Activity and FragmentActivity which are used several times. I want to know that is there any difference between these two, because when I changed Activity with FragmentActivity , it had no effect on the app.
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Passing functions with arguments to another function in Python?
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What if perform and action1, action2 on different files? @S.Lott
– alper
Sep 2 '19 at 18:47
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Difference between DTO, VO, POJO, JavaBeans?
...JavaBean is a Java Object that is serializable, has a nullary constructor, and allows access to properties using getter and setter methods.
In order to function as a JavaBean class, an object class must obey certain conventions about method naming, construction, and behavior. These conventions ...
Permission denied on accessing host directory in Docker
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See this Project Atomic blog post about Volumes and SELinux for the full story.
Specifically:
This got easier recently since Docker finally merged a patch which
will be showing up in docker-1.7 (We have been carrying the patch in
docker-1.6 on RHEL, CentOS, and Fe...
Hide grid row in WPF
... // Don't need any convert back
return null;
}
}
And then in the appropriate view <Grid.RowDefinition>:
<RowDefinition Height="{Binding IsHiddenRow, Converter={StaticResource BoolToGridRowHeightConverter}}"></RowDefinition>
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The 'json' native gem requires installed build tools
...on my windows 7 machine. Now I tried to install the JSON gem using the command, "gem install json" and got the following error.
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WITH CHECK ADD CONSTRAINT followed by CHECK CONSTRAINT vs. ADD CONSTRAINT
I'm looking at the AdventureWorks sample database for SQL Server 2008, and I see in their creation scripts that they tend to use the following:
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How to reuse existing C# class definitions in TypeScript projects
... framework domain model already there. I want my two projects (client side and server side) totally separated as two teams will work on this... JSON and REST is used to communicate objects back and forth.
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How to select the nth row in a SQL database table?
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There are ways of doing this in optional parts of the standard, but a lot of databases support their own way of doing it.
A really good site that talks about this and other things is http://troels.arvin.dk/db/rdbms/#select-limit.
Basically, PostgreSQL and MySQL supports the non-...