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Optional Methods in Java Interface
...ggests a very fuzzy understanding of what's really going on here.
It's important to realize that there are sort of two levels of conforming to an interface:
What the Java language can check. This pretty much just boils down to: is there some implementation for each of the methods?
Actually fulfil...
How does Activity.finish() work in Android?
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Does it exits immediately or completes
the function from which it was called
?
The method that called finish() will run to completion. The finish() operation will not even begin until you return control to Android.
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How do you get AngularJS to bind to the title attribute of an A tag?
... tooltip of a thumbnail.
Browsers do not create a tooltip from "ng-title" or "ng-attr-title."
5 Answers
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Swift - How to convert String to Double
... Float, Int). It'll return an Optional type (Double?) which will have the correct value or nil if the String was not a number.
Note: The NSString doubleValue property is not recommended because it returns 0 if the value cannot be converted (i.e.: bad user input).
let lessPrecisePI = Float("3.14")
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Simulate first call fails, second call succeeds
...docs:
Sometimes we need to stub with different return value/exception for the same method call. Typical use case could be mocking iterators. Original version of Mockito did not have this feature to promote simple mocking. For example, instead of iterators one could use Iterable or simply collect...
What is git actually doing when it says it is “resolving deltas”?
During the first clone of a repository, git first receives the objects (which is obvious enough), and then spends about the same amount of time "resolving deltas". What's actually happening during this phase of the clone?
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Java - No enclosing instance of type Foo is accessible
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static class Thing will make your program work.
As it is, you've got Thing as an inner class, which (by definition) is associated with a particular instance of Hello (even if it never uses or refers to it), which means it's an error to say new Thing(); without having...
Can you “compile” PHP code and upload a binary-ish file, which will just be run by the byte code int
I know that PHP is compiled to byte code before it is run on the server, and then that byte code can be cached so that the whole script doesn't have to be re-interpreted with every web access.
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c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区，为创新赋能！
...container stuff and have a rather in-depth question that hopefully a boost or C++ container expert might know (my knowledge in C++ containers is pretty basic). For reference, the boost documentation on composite keys can be found here: boost::multi_index composite keys.When using a composite key, th...
How to use the PI constant in C++
... include <math.h> . However, there doesn't seem to be a definition for PI in this header file.
21 Answers
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