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Python's equivalent of && (logical-and) in an if-statement
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1529
You would want and instead of &&.
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How to sort a dataframe by multiple column(s)
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R> dd[with(dd, order(-z, b)), ]
b x y z
4 Low C 9 2
2 Med D 3 1
1 Hi A 8 1
3 Hi A 9 1
Edit some 2+ years later: It was just asked how to do this by column index. The answer is to simply pass the desired sorting column(s) to the order() function:
R> dd[order(-dd[,4],...
How to get hex color value rather than RGB value?
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var hexDigits = new Array
("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","...
Select random row from a sqlite table
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216
Have a look at Selecting a Random Row from an SQLite Table
SELECT * FROM table ORDER BY RANDO...
How do I fit an image (img) inside a div and keep the aspect ratio?
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What is a magic number, and why is it bad? [closed]
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answered Sep 6 '08 at 22:46
Marcio AguiarMarcio Aguiar
12.8k66 gold badges3636 silver badges4242 bronze badges
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undefined method `source_index' for Gem:Module (NoMethodError)
I'm running a Rails 2.3.5 application and upon running script/server I am shown the following:
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Why isn't sizeof for a struct equal to the sum of sizeof of each member?
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“Missing compiler required member” error being thrown multiple times with almost no changes to code
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