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What exactly does big Ө notation represent?
...lanation
O(n) is asymptotic upper bound. If T(n) is O(f(n)), it means that from a certain n0, there is a constant C such that T(n) <= C * f(n). On the other hand, big-Omega says there is a constant C2 such that T(n) >= C2 * f(n))).
Do not confuse!
Not to be confused with worst, best and avera...
Is it unnecessary to put super() in constructor?
..., neither Eclipse nor IntelliJ provide any means of comfortably navigating from the constructor of the derived class to the constructor of the base class.
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When to use a “has_many :through” relation in Rails?
...role
end
This introduces a new table, and eliminates the group_id column from the user's table.
The problem with this code is that you'd have to update every where else you use the user class and change it:
user.groups.first.name
# becomes
user.group_memberships.first.group.name
This type of...
AJAX POST and Plus Sign ( + ) — How to Encode?
...t contains the url encoded data.
For a GET request you can retrieve this from the URI. $_SERVER['REQUEST_URI'] or $_SERVER['QUERY_STRING']. For a urlencoded POST, file_get_contents('php://stdin')
NB:
decode() only works for single byte encoded characters. It will not work for the full UTF-8 ran...
How to reuse an ostringstream?
... Worth pointing out that this won't re-use the underlying buffer from the ostringstream - it just assigns a new buffer. So while you're reusing the ostringstream object, you're still allocating two buffers. I don't think ostringstream is designed for reuse in the manner you intend.
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Appending an element to the end of a list in Scala
... Thanks a lot! That was exactly what I was searching for. I guess from your answer I shouldn't do that though... I'll revise my structure and see what can I do. Thanks again.
– Masiar
Oct 17 '11 at 13:19
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What's the dSYM and how to use it? (iOS SDK)
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From Crashlytics developers - twittercommunity.com/t/…
– genaks
Jun 9 '16 at 12:18
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PHP foreach change original array values
...and don't have full control of what you are doing, it is best to stay away from references. For more information about & operator take a look at this guide: Reference — What does this symbol mean in PHP?
For those who want to learn more about this part of PHP language: PHP References Explained...
Calling shell functions with xargs
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You can simplify this by including the argument from xargs in the command string for bash with bash -c 'echo_var "{}"'. So you do not need the _ {} at the end.
– phobic
Jun 2 '16 at 8:57
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What does FrameLayout do?
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Nice, I was thinking of it as a iframe as I am coming from web development. Thanks for the simplest explanation.
– Tarik
Dec 1 '17 at 19:54
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