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Collection that allows only unique items in .NET?
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answered Mar 1 '11 at 17:12
DonutDonut
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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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Convert a float64 to an int in Go
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213
package main
import "fmt"
func main() {
var x float64 = 5.7
var y int = int(x)
fmt.Printl...
How can I use map and receive an index as well in Scala?
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148
I believe you're looking for zipWithIndex?
scala> val ls = List("Mary", "had", "a", "littl...
Rounding BigDecimal to *always* have two decimal places
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1 Answer
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How to remove the last character from a string?
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Add column with number of days between dates in DataFrame pandas
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df['A'] = pd.to_datetime(df['A'])
df['B'] = pd.to_datetime(df['B'])
In [11]: df.dtypes # if already datetime64 you don't need to use to_datetime
Out[11]:
A datetime64[ns]
B datetime64[ns]
dtype: object
In [12]: df['A'] - df['B']
Out[12]:
one -58 days
two -26 days
dtype: timedelta64[ns...
jQuery find events handlers registered with an object
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16 Answers
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How to select the rows with maximum values in each group with dplyr? [duplicate]
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132
Try this:
result <- df %>%
group_by(A, B) %>%
filter(value...