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Create instance of generic type in Java?
Is it possible to create an instance of a generic type in Java? I'm thinking based on what I've seen that the answer is no ( due to type erasure ), but I'd be interested if anyone can see something I'm missing:
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What's the point of Spring MVC's DelegatingFilterProxy?
...hing is a deterministic program.
The DelegatingFilterProxy is a Filter as it was explained above, whose goal is "delegating to a Spring-managed bean that implements the Filter interface", that is, it finds a bean ("target bean" or "delegate") in your Spring application context and invokes it. How i...
serve current directory from command line
...meone give me a hint, howto serve the current directory from command line with ruby? it would be great, if i can have some system wide configuration (e.g. mime-types) and simply launch it from every directory.
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Insert picture/table in R Markdown [closed]
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Several sites provide reasonable cheat sheets or HOWTOs for tables and images. Top on my list are:
Pandoc readme, specifically tables
RStudio's RMarkdown, more details in basics (including tables) and a rewrite of pandoc's markdown....
ASP.NET Web API OperationCanceledException when browser cancels the request
When a user loads a page, it makes one or more ajax requests, which hit ASP.NET Web API 2 controllers. If the user navigates to another page, before these ajax requests complete, the requests are canceled by the browser. Our ELMAH HttpModule then logs two errors for each canceled request:
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Where should I put the log4j.properties file?
I wrote a web service project using netbeans 6.7.1 with glassfish v2.1, put log4j.properties to the root dir of project and use:
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In MySQL what does “Overhead” mean, what is bad about it, and how to fix it?
simple question, but its been nagging me for a while now....
4 Answers
4
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What is a semaphore?
...equently used to solve multi-threading problems. My question to the community:
14 Answers
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Add a default value to a column through a migration
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Here's how you should do it:
change_column :users, :admin, :boolean, :default => false
But some databases, like PostgreSQL, will not update the field for rows previously created, so make sure you update the field manaully on the migration too.
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What is the purpose of Rank2Types?
... arguments?
They do, but only of rank 1. This means that while you can write a function that takes different types of arguments without this extension, you can't write a function that uses its argument as different types in the same invocation.
For example the following function can't be typed wi...