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What's the difference between a proc and a lambda in Ruby?
...e:
p = Proc.new {|a, b| puts a**2+b**2 } # => #<Proc:0x3c7d28@(irb):1>
p.call 1, 2 # => 5
p.call 1 # => NoMethodError: undefined method `**' for nil:NilClass
p.call 1, 2, 3 # => 5
l = lambda {|a, b| puts a**2+b**2 } # => #<Proc:0x15016c@(irb):5 (lambda)>
l.call 1, 2 # =&g...
Add a common Legend for combined ggplots
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108
Update 2015-Feb
See Steven's answer below
df1 <- read.table(text="group x y
gr...
What is the difference between BIT and TINYINT in MySQL?
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124
A TINYINT is an 8-bit integer value, a BIT field can store between 1 bit, BIT(1), and 64 bits,...
Programmatically creating Markdown tables in R with KnitR
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122
Now knitr (since version 1.3) package include the kable function for a creation tables:
> ...
Renaming columns in pandas
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1974
Just assign it to the .columns attribute:
>>> df = pd.DataFrame({'$a':[1,2], '$b': [...
Convert a list of data frames into one data frame
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148
Use bind_rows() from the dplyr package:
bind_rows(list_of_dataframes, .id = "column_label")
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How to convert a Binary String to a base 10 integer in Java
...without leading zeroes) that I want to convert to their corresponding base 10 numbers. Consider:
9 Answers
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How to delete history of last 10 commands in shell?
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18 Answers
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Active
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How to group dataframe rows into list in pandas groupby?
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12 Answers
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Understanding “randomness”
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1481
Just a clarification
Although the previous answers are right whenever you try to spot the ra...