大约有 46,000 项符合查询结果（耗时：0.0717秒） [XML]
Check if item is in an array / list
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answered Jun 28 '12 at 19:40
Sven MarnachSven Marnach
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Rails 3 check if attribute changed
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campetersoncampeterson
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Adding asterisk to required fields in Bootstrap 3
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TimvpTimvp
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IntelliJ beginning of file keyboard shortcut
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answered Mar 13 '12 at 19:40
KirbyKirby
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How to use GNU Make on Windows?
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answered Oct 14 '12 at 19:26
user1594322user1594322
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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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How to access maven.build.timestamp for resource filtering
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edited Sep 12 at 15:02
Java Crazy
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answered Nov 5 '12 at 9:04
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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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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...
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...