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Give examples of functions which demonstrate covariance and contravariance in the cases of both over
...List<? super String> contravariantList = aList;
You can now access all methods of covariantList that doesn't take a generic parameter (as it must be something "extends Object"), but getters will work fine (as the returned object will always be of type "Object")
The opposite is true for cont...
Mock vs MagicMock
My understanding is that MagicMock is a superset of Mock that automatically does "magic methods" thus seamlessly providing support for lists, iterations and so on... Then what is the reason for plain Mock existing? Isn't that just a stripped down version of MagicMock that can be practically ...
What is the difference between HashSet and List?
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Actually, I prefer the answer that points out that HashSets are suitable in cases that you can treat your collection as "bag items". Set operations are not so frequent as Containment checks. At any point that you have a set of un...
Why is “if not someobj:” better than “if someobj == None:” in Python?
...a __nonzero__ special method (as do numeric built-ins, int and float), it calls this method. It must either return a bool value which is then directly used, or an int value that is considered False if equal to zero.
Otherwise, if the object has a __len__ special method (as do container built-ins, li...
Sending a mail from a linux shell script
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If you're not sure how to install/configure and you're on Ubuntu: sudo apt-get install mailutils and select Internet site: Mail is sent and received directly using SMTP..
– user1717828
Dec 15 '17 at 17:48
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Suppress warning CS1998: This async method lacks 'await'
...ave anything to await, and some might just throw. It's a bit annoying with all the warnings.
14 Answers
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Check if a Postgres JSON array contains a string
...nswered Nov 26 '14 at 8:16
SnowballSnowball
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Soft hyphen in HTML ( vs. ­)
...ly, &shy's support is so inconsistent between browsers that it can't really be used.
QuirksMode is right -- there's no good way to use soft hyphens in HTML right now. See what you can do to go without them.
2013 edit: According to QuirksMode, &shy; now works/is supported on all major brows...
How to disassemble one single function using objdump?
I've got a binary installed on my system, and would like to look at the disassembly of a given function. Preferrably using objdump , but other solutions would be acceptable as well.
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How can I use PowerShell with the Visual Studio Command Prompt?
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Stealing liberally from here: http://allen-mack.blogspot.com/2008/03/replace-visual-studio-command-prompt.html, I was able to get this to work. I added the following to my profile.ps1 and all is well with the world.
pushd 'c:\Program Fil...