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Possible heap pollution via varargs parameter
I understand this occurs with Java 7 when using varargs with a generic type;
5 Answers
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dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...ies, levels=c(levels(iris$Species), "empty_level"))
# Species is a factor and empty groups are included in the output
iris %>% group_by(Species, .drop=FALSE) %>% tally
#> Species n
#> 1 setosa 50
#> 2 versicolor 50
#> 3 virginica 50
#> 4 empty_level ...
converting CSV/XLS to JSON? [closed]
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This worked perfectly for me and does NOT require a file upload:
https://github.com/cparker15/csv-to-json?files=1
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Check with jquery if div has overflowing elements
I have a div with a fixed height and overflow:hidden;
9 Answers
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Resolve conflicts using remote changes when pulling from Git remote
...em in the history again, you're not asking how to pull - pull means merge, and you don't need to merge. All you need do is this:
# fetch from the default remote, origin
git fetch
# reset your current branch (master) to origin's master
git reset --hard origin/master
I'd personally recommend creati...
How does View Controller Containment work in iOS 5?
...r containers, analogous to UITabBarController , UINavigationController , and the like.
2 Answers
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How to tell if node.js is installed or not
I've recently installed node.js and I have no idea how to run applications. I installed node.js but couldn't find further instructions. What does one really need to do? I wanted to see if it was actually working. So I executed a script called hello.js. It went as such:
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Prevent redirection of Xmlhttprequest
...s when sending XMLHttpRequest-s (i.e. to get the redirect status code back and handle it myself)?
4 Answers
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What does the unary plus operator do?
... plus operator do? There are several definitions that I have found ( here and here ) but I still have no idea what it would be used for. It seems like it doesn't do anything but there has be a reason for it, right?
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Detecting arrow key presses in JavaScript
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@MrCroft - or also listen to onkeyup and stop the event there. Realistically you shouldn't be modifying UI behavior with Javascript, however.
– Mark Kahn
Jan 5 '17 at 19:52
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