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How to find and return a duplicate value in array
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Why is try {…} finally {…} good; try {…} catch{} bad?
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Convert java.util.Date to java.time.LocalDate
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Stephan Windmüller
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answered Jan 20 '14 at 19:06
JodaStephenJodaStephen
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Difference between static class and singleton pattern?
...re.
– Jorge Córdoba
Feb 6 '09 at 8:20
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Can you give an example of something which is inherent...
if…else within JSP or JSTL
...ndrea Ligios
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answered May 9 '11 at 11:00
Jigar JoshiJigar Joshi
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Convert the values in a column into row names in an existing data frame
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As of 2016 you can also use the tidyverse.
library(tidyverse)
samp %>% remove_rownames %>% column_to_rownames(var="names")
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How do I pronounce “=>” as used in lambda expressions in .Net
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edited Dec 6 '13 at 20:36
answered Nov 7 '08 at 23:46
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How do you delete a column by name in data.table?
...the data.table df3:
# Method 1 (and preferred as it takes 0.00s even on a 20GB data.table)
df3[,foo:=NULL]
df3[, c("foo","bar"):=NULL] # remove two columns
myVar = "foo"
df3[, (myVar):=NULL] # lookup myVar contents
# Method 2a -- A safe idiom for excluding (possibly multiple)
# columns matchi...
ruby system command check exit code
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edited Sep 10 '13 at 20:36
answered Sep 10 '13 at 20:31
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Exclude .svn directories from grep [duplicate]
...epsvn -R searchstring .
– Shane
Nov 20 '13 at 9:51
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