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How to empty a Heroku database
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If you already have multiple gems installed, you may be presented with:
Select gem to uninstall:
1. heroku-2.25.0
2. heroku-2.26.2
3. All versions
Just uninstall #2 and rerun the command. Joy!
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Create a matrix of scatterplots (pairs() equivalent) in ggplot2
... na.rm = na.rm, convert = convert, factor_key = factor_key),
select(., !!!vars))
} %>% gather(., key = !!ykey, value = !!yvalue, !!!vars,
na.rm = na.rm, convert = convert, factor_key = factor_key)
}
iris %>%
gatherpairs(Sepal.Length, Sepal.Width, Petal.Lengt...
Copy object values in Visual Studio debug mode
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You can add a watch for that object, and in the watch window, expand and select everything you want to copy and then copy it.
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Padding characters in printf
...t you hard code the value to the largest one you need and use padlength to select the actual length to output.
– Paused until further notice.
Nov 19 '18 at 13:53
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How can I style even and odd elements?
Is it possible to use CSS pseudo-classes to select even and odd instances of list items?
9 Answers
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“The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine” Error in importing
...4-bit Importer by clicking Start and searching for "Import and Export" and selecting the 64-bit tool.
– blizz
Apr 27 '17 at 16:21
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Unmount the directory which is mounted by sshfs in Mac [closed]
...ne can also locate the volume created by sshfs in Finder, right-click, and select Eject. Which is, to the best of my knowledge, the GUI version of the above command.
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jQuery object equality
...which jQuery objects can be considered equal is whether they have the same selector and context. This is easy enough to test: A.selector === B.selector && A.context === B.context. Often the context will always be the same, so we only have to consider the selector.
– Cas...
How do you use the ellipsis slicing syntax in Python?
...shape(2,2,2,2)
Now, you have a 4-dimensional matrix of order 2x2x2x2. To select all first elements in the 4th dimension, you can use the ellipsis notation
>>> a[..., 0].flatten()
array([ 0, 2, 4, 6, 8, 10, 12, 14])
which is equivalent to
>>> a[:,:,:,0].flatten()
array([ 0...
AWS S3 copy files and folders between two buckets
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You can now do it from the S3 admin interface. Just go into one bucket select all your folders actions->copy. Then move into your new bucket actions->paste.
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