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How does one make an optional closure in swift?
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How does the main() method work in C?
... in one manner, and defining it in another. But a compiler's startup trick does not have to be portable; it is not guided by the rules for portable programs.
But suppose that the calling conventions are such that it cannot work this way. In that case, the compiler has to treat main specially. When ...
XmlSerializer giving FileNotFoundException at constructor
...Hans' suggestion below is more valuable - use a different method call that does not produce this exception at all: XmlSerializer serializer = XmlSerializer.FromTypes(new[] { typeof(MyType) })[0];
– bright
Jun 9 '12 at 7:47
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Reference requirements.txt for the install_requires kwarg in setuptools setup.py file
...ot advised, it is still possible to parse the requirements.txt file (if it doesn't refer any external requirements by URL) with the following hack (tested with pip 9.0.1):
install_reqs = parse_requirements('requirements.txt', session='hack')
This doesn't filter environment markers though.
In o...
Check if image exists on server using JavaScript?
...now you know the image exists.
}).fail(function() {
// Image doesn't exist - do something else.
})
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Is there an easy way to add a border to the top and bottom of an Android View?
...he top, change the android:top="-2dp" to android:bottom="-2dp"
The colour does not need to be white and the background does not need to be transparent either.
The solid element may not be required. This will depend on your design (thanks V. Kalyuzhnyu).
Basically, this XML will create a border us...
How do I split a string into an array of characters? [duplicate]
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This does NOT work for emojis "????".length #=> 1 "????".chars #=> ["????"]
– Murhaf Sousli
Mar 24 '17 at 2:37
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What is a monad?
...ame type (i.e. return an Array).
First an example of method chaining which does not use the monad pattern:
[1,2,3].map(x => x + 1)
The result is [2,3,4]. The code does not conform to the monad pattern, since the function we are supplying as argument returns a number, not an Array. The same logic...
Why does LayoutInflater ignore the layout_width and layout_height layout parameters I've specified?
...from the XML. Calling inflate with root not equal null and attachRoot=true does load the layout parameters, but returns the root object again, which prevents further layout changes to the loaded object (unless you can find it using findViewById()).
The calling convention you most likely would like t...
Why does Python print unicode characters when the default encoding is ASCII?
...d from. If it can't find a proper encoding from the environment, only then does it revert to its default, ASCII.
For example, I use a bash shell which encoding defaults to UTF-8. If I start Python from it, it picks up and use that setting:
$ python
>>> import sys
>>> print sys.s...