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How to prevent ifelse() from turning Date objects into numeric objects
...<- fifelse(dates == '2011-01-01', dates - 1, dates)
str(dates)
# Date[1:5], format: "2010-12-31" "2011-01-02" "2011-01-03" "2011-01-04" "2011-01-05"
dplyr::if_else
From dplyr 0.5.0 release notes:
[if_else] have stricter semantics that ifelse(): the true and false arguments must be the same typ...
Java generics - why is “extends T” allowed but not “implements T”?
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edited Dec 2 '11 at 5:50
answered Jun 10 '09 at 15:45
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How to discard local commits in Git?
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605
git reset --hard origin/master
will remove all commits not in origin/master where origin is th...
What's the difference between IQueryable and IEnumerable
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IEnumerable<T> represents a forward-only cursor of T. .NET 3.5 added extension methods that included the LINQ standard query operators like Where and First, with any operators that require predicates or anonymous functions taking Func<T>.
IQueryable<T> implements the same ...
Android Studio: Module won't show up in “Edit Configuration”
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145
Make sure your build.gradle is
apply plugin: 'com.android.application'
not
apply plugi...
Input with display:block is not a block, why not?
..."text/css">
form {display:block; margin:0; padding:0; width:50%; border:1px solid green; overflow:visible}
div, input {display:block; border:1px solid red; padding:5px; width:100%; font:normal 12px Arial}
/* The voodoo starts here */
.bb {
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How to do URL decoding in Java?
... kryger
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answered May 26 '11 at 12:04
JesperJesper
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How do I revert all local changes in Git managed project to previous state?
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3519
If you want to revert changes made to your working copy, do this:
git checkout .
If you wan...
How do I keep Python print from adding newlines or spaces? [duplicate]
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15 Answers
15
Active
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Event listener for when element becomes visible?
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maltalefmaltalef
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8
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