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What is the difference between Ruby 1.8 and Ruby 1.9
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170
Sam Ruby has a cool slideshow that outline the differences.
In the interest of bringing this in...
Creating a Radial Menu in CSS
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+50
Almost 3 years later, I finally made the time to revisit this and post an improved version. You can still view the original answer at ...
Automatically expanding an R factor into a collection of 1/0 indicator variables for every factor le
...vel, there is an associated column in a new data frame, which contains a 1/0 indicator. E.g., suppose I have:
8 Answers
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Reverse colormap in matplotlib
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answered Jul 19 '10 at 11:45
ptomatoptomato
49.3k1111 gold badges9898 silver badges146146 bronze badges
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How to create the most compact mapping n → isprime(n) up to a limit N?
...ent every odd number with one bit e.g. for the given range of numbers (1, 10], starts at 3: 1110
31 Answers
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Remove rows with all or some NAs (missing values) in data.frame
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1080
Also check complete.cases :
> final[complete.cases(final), ]
gene hsap mmul m...
Error to install Nokogiri on OSX 10.9 Maverick?
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30 Answers
30
Active
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Tricky Google interview question
... implementation of Dijkstra’s solution.
int main()
{
const int n = 20; // Generate the first n numbers
std::vector<int> v(n);
v[0] = 1;
int i2 = 0; // Index for 2
int i5 = 0; // Index for 5
int x2 = 2 * v[i2]; // Next two candidat...
How to make good reproducible pandas examples
...nd below your code with your code unindented:
In [2]: df
Out[2]:
A B
0 1 2
1 1 3
2 4 6
test pd.read_clipboard(sep='\s\s+') yourself.
* I really do mean small, the vast majority of example DataFrames could be fewer than 6 rowscitation needed, and I bet I can do it in 5 rows. Can you re...
What's the best practice to round a float to 2 decimals? [duplicate]
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160
I was working with statistics in Java 2 years ago and I still got the codes of a function that a...