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Add column with number of days between dates in DataFrame pandas
I want to subtract dates in 'A' from dates in 'B' and add a new column with the difference.
4 Answers
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How to convert `git:` urls to `http:` urls
I'm working behind an http proxy. I'm trying to clone Android's source tree using their "repo" tool.
4 Answers
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How to prevent browser page caching in Rails
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Finally figured this out - http://blog.serendeputy.com/posts/how-to-prevent-browsers-from-caching-a-page-in-rails/ in application_controller.rb
After Rails 5:
class ApplicationController < ActionController::Base
before...
Check whether a string contains a substring
How can I check whether a given string contains a certain substring, using Perl?
3 Answers
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How to enter command with password for git pull?
I want to do this command in one line:
6 Answers
6
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Mongoose indexing in production code
...ever understood why the Mongoose documentation so broadly recommends disabling autoIndex in production. Once the index has been added, subsequent ensureIndex calls will simply see that the index already exists and then return. So it only has an effect on performance when you're first creating the ...
Open an IO stream from a local file or url
I know there are libs in other languages that can take a string that contains either a path to a local file or a url and open it as a readable IO stream.
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How can I check whether a numpy array is empty or not?
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You can always take a look at the .size attribute. It is defined as an integer, and is zero (0) when there are no elements in the array:
import numpy as np
a = np.array([])
if a.size == 0:
# Do something when `a` is empty
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How to specify a multi-line shell variable?
...below:
read -d '' sql << EOF
select c1, c2 from foo
where c1='something'
EOF
echo "$sql"
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How can you find the unused NuGet packages in a solution?
How can you find the unused NuGet packages in a solution?
5 Answers
5
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