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Remove all the elements that occur in one list from another
Let's say I have two lists, l1 and l2 . I want to perform l1 - l2 , which returns all elements of l1 not in l2 .
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Convert a CERT/PEM certificate to a PFX certificate
...L is available at slproweb.com/products/Win32OpenSSL.html. Just tried it, and it worked properly for this purpose.
– BrianFinkel
Sep 30 '11 at 17:55
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Join between tables in two different databases?
In MySQL, I have two different databases -- let's call them A and B .
4 Answers
4
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Disable hover effects on mobile browsers
I'm writing a Web site that's meant to be used from both desktops and tablets. When it's being visited from a desktop, I want the clickable areas of the screen to light up with :hover effects (different background color, etc.) With a tablet, there's no mouse, so I don't want any hover effects.
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WCF chokes on properties with no “set ”. Any workaround?
I have some class that I'm passing as a result of a service method, and that class has a get-only property:
9 Answers
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Ruby on Rails form_for select field with class
..._class' }) %>
select helper takes two options hashes, one for select, and the second for html options. So all you need is to give default empty options as first param after list of items and then add your class to html_options.
http://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsH...
How to set text color to a text view programmatically [duplicate]
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Great answers. Adding one that loads the color from an Android resources xml but still sets it programmatically:
textView.setTextColor(getResources().getColor(R.color.some_color));
Please note that from API 23, getResources().getColor() is deprecated. Use instead:
textView.se...
Retrieving the last record in each group - MySQL
...dowing functions, like almost all popular SQL implementations. With this standard syntax, we can write greatest-n-per-group queries:
WITH ranked_messages AS (
SELECT m.*, ROW_NUMBER() OVER (PARTITION BY name ORDER BY id DESC) AS rn
FROM messages AS m
)
SELECT * FROM ranked_messages WHERE rn = 1...
How to completely remove an issue from GitHub?
...entered in error"
At May 2018, original answer:
Three 8 years later, and closing issues remains the answer (still no deletion possible).
See "The Ghost of Issues Past", where GitHub advise to check and close:
issues opened over a year ago state:open created:<2013-01-01
the ones I'm invol...
Catching an exception while using a Python 'with' statement
To my shame, I can't figure out how to handle exception for python 'with' statement. If I have a code:
4 Answers
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