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How to exit an if clause
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102
(This method works for ifs, multiple nested loops and other constructs that you can't break fr...
Calculating width from percent to pixel then minus by pixel in LESS CSS
...ill calculate width in some element from percent to pixel so I will minus -10px via using LESS and calc() . It´s possible?
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Quickest way to convert a base 10 number to any base in .NET?
...ts binary representation
Console.WriteLine(binary); // prints 101
However, as pointed out by the comments, Convert.ToString only supports the following limited - but typically sufficient - set of bases: 2, 8, 10, or 16.
Update (to meet the requirement to convert to any base):
I'm n...
Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
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edited Dec 3 '10 at 2:36
answered Dec 2 '10 at 23:40
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Random row selection in Pandas dataframe
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answered Apr 10 '13 at 10:55
eumiroeumiro
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super() in Java
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answered Sep 22 '10 at 8:09
pakorepakore
10.5k1010 gold badges3939 silver badges6262 bronze badges
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Add zero-padding to a string
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answered Jun 26 '10 at 4:18
kemiller2002kemiller2002
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Check if a number is int or float
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edited Dec 27 '10 at 20:00
answered Dec 27 '10 at 19:16
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More than 10 lines in a node.js stack error?
Is there a way to get more than 10 lines in a node.js stack error?
4 Answers
4
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Remove duplicated rows using dplyr
...ow:
library(dplyr)
set.seed(123)
df <- data.frame(
x = sample(0:1, 10, replace = T),
y = sample(0:1, 10, replace = T),
z = 1:10
)
One approach would be to group, and then only keep the first row:
df %>% group_by(x, y) %>% filter(row_number(z) == 1)
## Source: local data frame [...