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How to correctly use the extern keyword in C

...les: on variables it doesn't instantiate the variable itself, i.e. doesn't allocate any memory. This needs to be done somewhere else. Thus it's important if you want to import the variable from somewhere else. For functions, this only tells the compiler that linkage is extern. As this is the default...
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How to reset db in Django? I get a command 'reset' not found error

... It looks like the 'flush' answer will work for some, but not all cases. I needed not just to flush the values in the database, but to recreate the tables properly. I'm not using migrations yet (early days) so I really needed to drop all the tables. Two ways I've found to drop all ...
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Android Use Done button on Keyboard to click button

... You can use this one also (sets a special listener to be called when an action is performed on the EditText), it works both for DONE and RETURN: max.setOnEditorActionListener(new OnEditorActionListener() { @Override public boolean onEditorAction(TextView v, int acti...
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Determining if an Object is of primitive type

... The types in an Object[] will never really be primitive - because you've got references! Here the type of i is int whereas the type of the object referenced by o is Integer (due to auto-boxing). It sounds like you need to find out whether the type is a "wrapper ...
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Using awk to print all columns from the nth to the last

... will print all but very first column: awk '{$1=""; print $0}' somefile will print all but two first columns: awk '{$1=$2=""; print $0}' somefile share ...
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Matlab: Running an m-file from command-line

...a .bat file. I gave it as an example. Actually, I will run it by the Win32 API function CreateProcessW(). – hkBattousai Jul 13 '11 at 9:01 add a comment  | ...
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Entity Framework code first unique column

...s: SQL Server retains the 900-byte limit for the maximum total size of all index key columns." (from: http://msdn.microsoft.com/en-us/library/ms191241.aspx ) You can solve this by setting a maximum string length on your model: [StringLength(450)] Your model will look like this now in EF CF...
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How To: Best way to draw table in console app (C#)

..., until you start working with non-unicode characters. Then the width gets all messed up. – Thom Jul 6 at 9:54 add a comment  |  ...
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error: passing xxx as 'this' argument of xxx discards qualifiers

...ere the value type is the same as the key type, both iterator and const_iterator are constant iterators. It is unspecified whether or not iterator and const_iterator are the same type. So VC++ 2008 Dinkumware implementation is faulty. Old answer: You got that error because in certain...
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How to pass arguments from command line to gradle

... with something like this follow the instructions here: import org.gradle.api.tasks.options.Option; public class PrintPet extends DefaultTask { private String pet; @Option(option = "pet", description = "Name of the cute pet you would like to print out!") public void setPet(String pet)...