大约有 46,000 项符合查询结果（耗时：0.0551秒） [XML]
BindingFlags.IgnoreCase not working for Type.GetProperty()?
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edited Oct 6 '17 at 16:12
boop_the_snoot
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answ...
Why can't I call read() twice on an open file?
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Nunser
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answered Oct 11 '10 at 12:27
TimTim
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Android layout replacing a view with another view on run time
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edited Dec 12 '14 at 6:05
cherdt
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answered May 5 '11...
How do I delete a fixed number of rows with sorting in PostgreSQL?
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edited Sep 27 '12 at 21:09
pd40
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answe...
How to use GNU Make on Windows?
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answered Oct 14 '12 at 19:26
user1594322user1594322
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sbt-assembly: deduplication found error
...66231 44.6595 4.66231C43.6264 4.66231 43.1481 5.28821 43.1481 6.59048V11.9512C43.1481 13.2535 43.6264 13.8962 44.6595 13.8962C45.6924 13.8962 46.1709 13.2535 46.1709 11.9512V9.17788Z\"/\u003e\u003cpath d=\"M32.492 10.1419C32.492 12.6954 34.1182 14.0484 37.0451 14.0484C39.9723 14.0484 41.5985 12.6954...
Pushing app to heroku problem
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answered Mar 5 '12 at 16:57
BruiserBruiser
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How can I get all constants of a type by reflection?
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edited Apr 30 '19 at 12:01
Christian
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answer...
What does “@” mean in Windows batch scripts
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answered Oct 20 '16 at 10:12
Muhammad Faizan KhanMuhammad Faizan Khan
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Remove duplicated rows using dplyr
...ction for this purpose.
Original answer below:
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_nu...