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Extracting specific columns from a data frame
... Given the considerably evolution of the Tidyverse since posting my question, I've switched the answer to you.
– Aren Cambre
Aug 16 '18 at 13:58
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'heroku' does not appear to be a git repository
When I try to push my app to Heroku I get this response:
20 Answers
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Exclude .svn directories from grep [duplicate]
When I grep my Subversion working copy directory, the results include a lot of files from the .svn directories. Is it possible to recursively grep a directory, but exclude all results from .svn directories?
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Is the != check thread safe?
...d use multiple threads but didn't fail. I guess could not simulate race on my machine.
That doesn't mean anything! The issue is that if an execution in which a is updated by another thread is allowed by the JLS, then the code is not thread-safe. The fact that you cannot cause the race condition ...
How to execute a Ruby script in Terminal?
I've set everything up that I need on my Mac (Ruby, Rails, Homebrew, Git, etc), and I've even written a small program. Now, how do I execute it in Terminal? I wrote the program in Redcar and saved it as a .rb, but I don't know how to execute it through Terminal. I want to run the program and see if ...
How to sort a list of strings?
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Basic answer:
mylist = ["b", "C", "A"]
mylist.sort()
This modifies your original list (i.e. sorts in-place). To get a sorted copy of the list, without changing the original, use the sorted() function:
for x in sorted(mylist):
print ...
How to set initial value and auto increment in MySQL?
How do I set the initial value for an "id" column in a MySQL table that start from 1001?
10 Answers
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Nginx not picking up site in sites-enabled?
...research I have not figured out why this doesn't work! I am trying to move my localhost to my sites-enabled folder which is in /etc/nginx/sites-enabled/default.
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[ :Unexpected operator in shell programming [duplicate]
My code:
7 Answers
7
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Detect rotation of Android phone in the browser with JavaScript
...ing for a solution that also works on iOS should look at two-bit-fool's or my answer.
– mklement0
Dec 10 '12 at 16:39
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