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How do you test a public/private DSA keypair?
... that a given private key matches a given public key? I have a few *.pub and a few *.key files, and I need to check which go with which.
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Linux vi arrow keys broken in insert mode
...s don't work in vi in insert mode at home, they just each insert a newline and a capital letter, like 'A'. Is there a way to fix that?
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Is Meyers' implementation of the Singleton pattern thread safe?
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In C++11, it is thread safe. According to the standard, §6.7 [stmt.dcl] p4:
If control enters
the declaration concurrently while the variable is being initialized, the concurrent execution shall wait for completion of the initialization.
GCC and VS support for the...
How to change the default collation of a table?
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To change the default character set and collation of a table including those of existing columns (note the convert to clause):
alter table <some_table> convert to character set utf8mb4 collate utf8mb4_unicode_ci;
Edited the answer, thanks to the prompt...
How to do an INNER JOIN on multiple columns
I'm working on a homework project and I'm supposed to perform a database query which finds flights either by the city name or the airport code, but the flights table only contains the airport codes so if I want to search by city I have to join on the airports table.
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Difference between .tagName and .nodeName
What is the difference between $('this')[0].nodeName and $('this')[0].tagName ?
4 Answers
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What's an object file in C?
...object file is. What's the real difference between any other compiled file and an object file?
I would be glad if someone could explain in human language.
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CodeIgniter: Create new helper?
I need to loop lot of arrays in different ways and display it in a page. The arrays are generated by a module class. I know that its better not to include functions on 'views' and I want to know where to insert the functions file.
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AutoLayout with hidden UIViews?
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UIStackView is probably the way to go for iOS 9+. Not only does it handle the hidden view, it will also remove additional spacing and margins if set up correctly.
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How to revert a “git rm -r .”?
...to your last commit. If you do have uncommitted changes, but the first command doesn't work, then save your uncommitted changes with git stash:
git stash
git reset --hard HEAD
git stash pop
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