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How are parameters sent in an HTTP POST request?
In an HTTP GET request, parameters are sent as a query string :
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What is Persistence Context?
I am new to the Java world and JPA. I was studying JPA and came across many new terms like Entity, persistence. While reading, I could not understand the exact definition for Persistence Context .
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Why use the 'ref' keyword when passing an object?
If I am passing an object to a method, why should I use the ref keyword? Isn't this the default behaviour anyway?
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How do I stop a web page from scrolling to the top when a link is clicked that triggers JavaScript?
When I have a link that is wired-up with a jQuery or JavaScript event such as:
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What is the difference between a symbolic link and a hard link?
Recently I was asked this during a job interview. I was honest and said I knew how a symbolic link behaves and how to create one, but do not understand the use of a hard link and how it differs from a symbolic one.
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What is so bad about singletons? [closed]
The singleton pattern is a fully paid up member of the GoF 's patterns book , but it lately seems rather orphaned by the developer world. I still use quite a lot of singletons, especially for factory classes , and while you have to be a bit careful about multithreading issues (like any class ac...
What is meant by 'first class object'?
In a recent question , I received suggestions to talk on, amongst other things, the aspect of JavaScript where functions are 'first class' objects. What does the 'first class' mean in this context, as opposed to other objects?
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How is Docker different from a virtual machine?
I keep rereading the Docker documentation to try to understand the difference between Docker and a full VM. How does it manage to provide a full filesystem, isolated networking environment, etc. without being as heavy?
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On Duplicate Key Update same as insert
I've searched around but didn't find if it's possible.
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Python data structure sort list alphabetically
I am a bit confused regarding data structure in python; () , [] , and {} . I am trying to sort a simple list, probably since I cannot identify the type of data I am failing to sort it.
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