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Using LIMIT within GROUP BY to get N results per group?
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13 Answers
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How to assign colors to categorical variables in ggplot2 that have stable mapping?
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192
For simple situations like the exact example in the OP, I agree that Thierry's answer is the b...
git: Apply changes introduced by commit in one repo to another repo
I have a repo1 and repo2 on local machine. They are very similar, but the latter is some kind of other branch ( repo1 is not maintained anymore).
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How do you round a float to two decimal places in jruby
JRuby 1.6.x. How do you round a float to decimal places in jruby.
6 Answers
6
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R programming: How do I get Euler's number?
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150
The R expression
exp(1)
represents e, and
exp(2)
represents e^2.
This works because exp...
How to use RSpec's should_raise with any kind of exception?
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expect { some_method }.to raise_error
RSpec 1 Syntax:
lambda { some_method }.should raise_error
See the documentation (for RSpec 1 syntax) and RSpec 2 documentation for more.
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Retina displays, high-res background images
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185
Do I need to double the size of the .box div to 400px by 400px to
match the new high res ...
How to initialize a dict with keys from a list and empty value in Python?
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dict.fromkeys([1, 2, 3, 4])
This is actually a classmethod, so it works for dict-subclasses (like collections.defaultdict) as well. The optional second argument specifies the value to use for the keys (defaults to None.)
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Add 2 hours to current time in MySQL?
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edited Aug 20 '13 at 7:23
answered Feb 26 '09 at 8:41
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R apply function with multiple parameters
I have a function f(var1, var2) in R. Suppose we set var2 = 1 and now I want to apply the function f() to the list L . Basically I want to get a new list L* with the outputs
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