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Extract a dplyr tbl column as a vector
... a neat function to make pulling out a column a bit nicer (easier to type, and easier to read):
pull <- function(x,y) {x[,if(is.name(substitute(y))) deparse(substitute(y)) else y, drop = FALSE][[1]]}
This lets you do either of these:
iris2 %>% pull('Species')
iris2 %>% pull(Species)
iri...
Single quotes vs. double quotes in C or C++
When should I use single quotes and double quotes in C or C++ programming?
12 Answers
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How can I create Min stl priority_queue?
... @AraK, I think you mean operator< ;)
– Peter Alexander
Mar 13 '10 at 17:46
16
It's worth noti...
How to run crontab job every week on Sunday
...on Sunday. I think the following should work, but I'm not sure if I understand correctly. Is the following correct?
10 Answ...
Disable a Button
... not required for it to work. You can type cast the button in the IBAction and change the enabled status or if you have it set up as an IBOutlet you can do it using the .notation on the outlet. Both ways work.
– Krivvenz
Mar 7 '19 at 16:28
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How to use continue in jQuery each() loop?
In my application i am using AJAX call. I want to use break and continue in this jQuery loop.
4 Answers
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What Automatic Resource Management alternatives exist for Scala?
...tending the design pattern - taking inspiration from python with statement and addressing:
statements to run before the block
re-throwing exception depending on the managed resource
handling two resources with one single using statement
resource-specific handling by providing an implicit conversi...
Showing Travis build status in GitHub repo
... mean, go to your github repo > Settings > Service Hooks. Use Ctrl+F and search for Travis.
EDIT2:
Go to https://travis-ci.org/profile/{fill in your own usernam}/profile
Then copy the token and paste it inside the Travis Service Hook page in your Github Repo Settings section.
Type in your ...
UITableView + Add content offset at top
...orInsets:[self.tableView contentInset]];
– David Hernandez
Sep 5 '14 at 16:28
add a comment
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What does PorterDuff.Mode mean in android graphics.What does it do?
I would like to know what PorterDuff.Mode means in android graphics.
2 Answers
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