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Magic number in boost::hash_combine
...ash_combine template function takes a reference to a hash (called seed ) and an object v . According to the docs , it combines seed with the hash of v by
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How do I find duplicates across multiple columns?
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Duplicated id for pairs name and city:
select s.id, t.*
from [stuff] s
join (
select name, city, count(*) as qty
from [stuff]
group by name, city
having count(*) > 1
) t on s.name = t.name and s.city = t.city
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How to give System property to my test via Gradle and -D
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The -P flag is for gradle properties, and the -D flag is for JVM properties. Because the test may be forked in a new JVM, the -D argument passed to gradle will not be propagated to the test - it sounds like that is the behavior you are seeing.
You can use the sy...
How do I do an initial push to a remote repository with Git?
I've read through countless tutorials and I keep coming up short. Here's what I've got:
6 Answers
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How to store values from foreach loop into an array?
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Declare the $items array outside the loop and use $items[] to add items to the array:
$items = array();
foreach($group_membership as $username) {
$items[] = $username;
}
print_r($items);
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How to write log base(2) in c/c++
... log2 (x) = logy (x) / logy (2)
where y can be anything, which for standard log functions is either 10 or e.
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What are the differences between git remote prune, git prune, git fetch --prune, etc
...ed under refs/remotes/...)
(e.g., local repo, refs/remotes/origin/master)
And a local branch that might be tracking the remote branch
(e.g., local repo, refs/heads/master)
Let's start with git prune. This removes objects that are no longer being referenced, it does not remove references. In yo...
Saving vim macros
...copy/paste registers so you can paste it as normal with the "xp or "xP commands in normal mode.
To save it you open up .vimrc and paste the contents, then the register will be around the next time you start vim.
The format is something like:
let @q = 'macro contents'
Be careful of quotes, though...
Function to return only alpha-numeric characters from string?
I'm looking for a php function that will take an input string and return a sanitized version of it by stripping away all special characters leaving only alpha-numeric.
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I need to pop up and trash away a “middle” commit in my master branch. How can I do it?
... the history is not rewritten, you maintain a clear record of the mistake, and other repos will accept the push.
Here's a good way to erase: git rebase -i <commit>^
That takes you to the commit just before the one you want to remove. The interactive editor will show you a list of all the comm...