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Convert base class to derived class [duplicate]
Is it possible in C# to explicitly convert a base class object to one of it's derived classes? Currently thinking I have to create a constructor for my derived classes that accept a base class object as a parameter and copy over the property values. I don't really like this idea, so I'd like to avoi...
Java Enum definition
...t I understood Java generics pretty well, but then I came across the following in java.lang.Enum:
7 Answers
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C++ Build Systems - What to use? [closed]
I'm looking at starting a new project in C++ - just in my own time initially - and I'm investigating the build systems that are available. It would appear that the answer is "Many, and they're all awful".
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Why do you need to put #!/bin/bash at the beginning of a script file?
I have made Bash scripts before and they all ran fine without #!/bin/bash at the beginning.
9 Answers
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Prevent any form of page refresh using jQuery/Javascript
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#1 can be implemented via window.onbeforeunload.
For example:
<script type="text/javascript">
window.onbeforeunload = function() {
return "Dude, are you sure you want to leave? Think of the kittens!";
}
</script>
The u...
How to really read text file from classpath in Java
I am trying to read a text file which is set in CLASSPATH system variable. Not a user variable.
18 Answers
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How to make exe files from a node.js app?
...few alternatives, both free and commercial. I haven't used any of them but in theory they should work:
Iexpress (native windows tool)
Quick Batch File Compiler (commercial)
BoxedApp Packer
"Advanced" Batch To EXE Converter" (freeware)
Most will require you to keep the batch file as main executab...
deny direct access to a folder and file by htaccess
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I would just move the includes folder out of the web-root, but if you want to block direct access to the whole includes folder, you can put a .htaccess file in that folder that contains just:
deny from all
That way you cannot open any file from...
How to run code when a class is subclassed? [duplicate]
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Classes (by default) are instances of type.
Just as an instance of a class Foo is created by foo = Foo(...),
an instance of type (i.e. a class) is created by myclass = type(name, bases, clsdict).
If you want something special to happen at the moment...
NumPy or Pandas: Keeping array type as integer while having a NaN value
...s there a preferred way to keep the data type of a numpy array fixed as int (or int64 or whatever), while still having an element inside listed as numpy.NaN ?
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