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How can mixed data types (int, float, char, etc) be stored in an array?
...eger int_;
real real_;
} record;
enum types { INVALID, INT, REAL };
Now it may appear that we're repeating ourselves, and we are. But consider that this definition is likely to be isolated to a single file. But we've eliminated the noise of specifiying the intermediate .val. before you get to...
Assign multiple columns using := in data.table, by group
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This now works in v1.8.3 on R-Forge. Thanks for highlighting it!
x <- data.table(a = 1:3, b = 1:6)
f <- function(x) {list("hi", "hello")}
x[ , c("col1", "col2") := f(), by = a][]
# a b col1 col2
# 1: 1 1 hi hello
# ...
What is Normalisation (or Normalization)?
...hn
2 | Ford 2 | Sue
2 | Cadillac
Now it may seem like we still have redundant data because the UserId's are repeated; However the PK/FK constraint ensures that the values cannot be updated independently, so integrity is safe.
Is it important? Yes, it is ver...
Why does this (null || !TryParse) conditional result in “use of unassigned local variable”?
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I'm just glad to know that I'm not going crazy :) I've since updated my code to only rely on TryParse, so I'm set for now. Thanks for your insight!
– Brandon Martinez
Apr 30 '13 at 17:39
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Function passed as template argument
...cout << "Result is " << temp << std::endl;
}
which can now be called as either:
doOperation(add2);
doOperation(add3());
See it live
The problem with this is that if it makes it tricky for the compiler to inline the call to add2, since all the compiler knows is that a function...
What is the full path to the Packages folder for Sublime text 2 on Mac OS Lion
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In addition, the user's library directory is now hidden by default in newer versions of OSX. Run chflags nohidden ~/Library in the terminal to reveal them.
– DA.
Jul 4 '13 at 16:51
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Server polling with AngularJS
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Excellent, thanks. I didn't know you could put the callback there. That solved the spamming issue. I also moved the data assignment to inside the callback which solved the UI clearing problem.
– Dave
Dec 2 '12 at 17...
SFTP Libraries for .NET [closed]
Can anyone recommend a good SFTP library to use? Right now I'm looking at products such as SecureBlackbox, IPWorks SSH, WodSFTP, and Rebex SFTP. However, I have never used any SFTP library before so I'm not sure what I'm looking for.
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Remove/Add Line Breaks after Specific String using Sublime Text
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Seems so obvious now... thanks a million! Also, @Mauro - I'm on Windows, and I can used ctrl + d to select the next iteration of the selection. Perhaps the same functionality exists on MAC with Command + d ? You may have to press it numerous ...
How to: Define theme (style) item for custom widget
...ble.CustomImageButton_customAttr, "" );
array.recycle();
}
}
Now you have to apply Theme.Custom to all activities that use CustomImageButton (in AndroidManifest.xml):
<activity android:name=".MyActivity" android:theme="@style/Theme.Custom"/>
That's all. Now CustomImageButton t...