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Reorder bars in geom_bar ggplot2
...lue = c(7L, 75L, 70L, 5L, 10L, 47L)),
class = "data.frame", row.names = c("1", "2", "3", "4", "5", "6"))
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What are the benefits to marking a field as `readonly` in C#?
What are the benefits of having a member variable declared as read only? Is it just protecting against someone changing its value during the lifecycle of the class or does using this keyword result in any speed or efficiency improvements?
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How would one call std::forward on all arguments in a variadic function?
...was just writing a generic object factory and using the boost preprocessor meta-library to make a variadic template (using 2010 and it doesn't support them). My function uses rval references and std::forward to do perfect forwarding and it got me thinking...when C++0X comes out and I had a standar...
Reading CSV files using C#
....VisualBasic (yes, it says VisualBasic but it works in C# just as well - remember that at the end it is all just IL)
use the Microsoft.VisualBasic.FileIO.TextFieldParser class to parse CSV file
Here is the sample code:
using (TextFieldParser parser = new TextFieldParser(@"c:\temp\test.csv"))
{
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Can you test google analytics on a localhost address?
...ogle Analytics tracking code uses slightly different code to achieve the same results.
Google Analytics Classic - Asynchronous Syntax - ga.js
The current syntax for setting the tracking domain to none on google analytics looks like this:
_gaq.push(['_setDomainName', 'none']);
Google analytics will ...
Convert column classes in data.table
...e: How do I convert column classes? Here is a simple example: With data.frame I don't have a problem converting it, with data.table I just don't know how:
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Restoring MySQL database from physical files
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He says he have .frm .myi and .myd files. I then assumed it was MyISAM tables.
– Vincent
Aug 24 '09 at 16:31
5
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How do you clone a Git repository into a specific folder?
... clone git@github.com:whatever creates a directory in my current folder named whatever , and drops the contents of the Git repository into that folder:
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How to detect the currently pressed key?
In Windows Forms , you can know, at any time, the current position of the cursor thanks to the Cursors class.
11 Answers...
How can i tell if an object has a key value observer attached
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Put a try catch around your removeObserver call
@try{
[someObject removeObserver:someObserver forKeyPath:somePath];
}@catch(id anException){
//do nothing, obviously it wasn't attached because an exception was thrown
}
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