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Selecting only numeric columns from a data frame
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## nums <- sapply(x, is.numeric)
For a more idiomatic modern R I'd now recommend
x[ , purrr::map_lgl(x, is.numeric)]
Less codey, less reflecting R's particular quirks, and more straightforward, and robust to use on database-back-ended tibbles:
dplyr::select_if(x, is.numeric)
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Passing parameters in rails redirect_to
How do we pass parameters in redirect_to in rails?
I know we can pass id using this:
9 Answers
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Amend a commit that wasn't the previous commit [duplicate]
...se -i sha1^ 4) change pick to edit on the old commit you want to change 5) now that your workspace looks like it did during the old commit, replace the (old) file with the copy you made of the new file 6) git add path/to/file to add that file to the commit 7) git commit --amend 8) git rebase --conti...
C# '@' before a String [duplicate]
...pe it. I always hated not being able to escape " when using @. I feel dumb now. Thanks...
– Dustin Davis
Feb 2 '11 at 21:59
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Apache not starting on MAMP Pro
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Im facing the same issue now in OS X El Captain , i have upgraded to 3.0.7.3 but still cant run apache. Can anyone hel me . thanks
– Delavega
Oct 5 '15 at 4:47
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set the width of select2 input (through Angular-ui directive)
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This is the best answer so far. But now, for me, the search field doesn't fill all the width. Any easy way to correct this?
– TNT
Dec 23 '17 at 22:39
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Ninject vs Unity for DI [closed]
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This answer is now pretty irrelevant with reagrd to Ninject 2. Whilst the complaint was legitimate for Ninject 1, Ninject 2 allows one to work without littering there classes with attributes. ninject2 will operate transparently without th...
Add new field to every document in a MongoDB collection
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Pymongo 3.9+
update() is now deprecated and you should use replace_one(), update_one(), or update_many() instead.
In my case I used update_many() and it solved my issue:
db.your_collection.update_many({}, {"$set": {"new_field": "value"}}, upsert=Fa...
Detecting touch screen devices with Javascript
...t on devices with no touch input running a touch-capable browser. I don't know of a way to detect device touch capability natively, without just waiting for a touch event to occur.
– Stu Cox
Dec 12 '12 at 11:24
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What does O(log n) mean exactly?
...propriate spot in a new, empty phone book.
For the below examples, we're now at the printer's office. Phone books are waiting to be mailed to each resident or business, and there's a sticker on each phone book identifying where it should be mailed to. Every person or business gets one phone book.
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