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How to tell if UIViewController's view is visible
I have a tab bar application, with many views. Is there a way to know if a particular UIViewController is currently visible from within the UIViewController ? (looking for a property)
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Double vs single quotes
...the user
Interpolating with single quotes does not work at all:
'#{Time.now}'
=> "\#{Time.now}" # which is not what you want..
Best practice
As most of the Ruby Linters suggest use single quote literals for your strings and go for the double ones in the case of interpolation/escaping sequen...
How can I listen for a click-and-hold in jQuery?
...timeoutId);
});
Edit: correction per AndyE...thanks!
Edit 2: using bind now for two events with same handler per gnarf
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Wait for a process to finish
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Who would have known that tail would do this.
– ctrl-alt-delor
Jul 30 '17 at 15:06
8
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Understanding generators in Python
...u do not look into until you understand the basic concept of a generator.
Now you may ask: why use generators? There are a couple of good reasons:
Certain concepts can be described much more succinctly using generators.
Instead of creating a function which returns a list of values, one can write ...
Is pass-by-value a reasonable default in C++11?
... void foo(T const&); and void foo(T&&);.
With that in mind, I now wrote my valued constructors as such:
class T {
U u;
V v;
public:
T(U u, V v)
: u(std::move(u))
, v(std::move(v))
{}
};
Otherwise, passing by reference to const still is reasonable.
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UDP vs TCP, how much faster is it? [closed]
...P is faster than TCP, and the simple reason is because its non-existent acknowledge packet (ACK) that permits a continuous packet stream, instead of TCP that acknowledges a set of packets, calculated by using the TCP window size and round-trip time (RTT).
For more information, I recommend the simpl...
Integer division: How do you produce a double?
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I don't like casting primitives, who knows what may happen.
Why do you have an irrational fear of casting primitives? Nothing bad will happen when you cast an int to a double. If you're just not sure of how it works, look it up in the Java Language Specificatio...
How do I overload the square-bracket operator in C#?
... +1 for the handy list. FYI the link died. (4 years later, I know)
– Mixxiphoid
Mar 4 '13 at 21:04
I'd li...
Gem::LoadError for mysql2 gem, but it's already in Gemfile
...e with a specific mysql version like below
gem 'mysql2', '~> 0.3.18'
Now stop the server and run bundle
bundle install
Now restart your server. It should work.
rails s
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