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Deep null checking, is there a better way?
...." to the language that has the semantics you want. (And it has been added now; see below.) That is, you'd say
cake?.frosting?.berries?.loader
and the compiler would generate all the short-circuiting checks for you.
It didn't make the bar for C# 4. Perhaps for a hypothetical future version of t...
How can I find out if I have Xcode commandline tools installed?
...
if you want to know the install version of Xcode as well as Swift
language current version:
Use below simple command by using Terminal:
1. To get install Xcode Version
xcodebuild -version
2. To get install Swift language Version
sw...
How to get the absolute coordinates of a view
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Now that's the kind of function I expected to find. Unfortunately, I must not be using it properly. I realise it was a known bug that getLocationOnScreen gives a null pointer exception in Android v1.5 (the platform I'm coding...
Can you test google analytics on a localhost address?
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Updated for 2014
This can now be achieved by simply setting the domain to none.
ga('create', 'UA-XXXX-Y', 'none');
See: https://developers.google.com/analytics/devguides/collection/analyticsjs/domains#localhost
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Best way to test SQL queries [closed]
...onth as
select *, year * 12 + month as absolute_month from month_value;
Now what we have to test is inherent in our spec, namely that for any tuple (year, month), there is one and only one (absolute_month), and that (absolute_month)s are consecutive. Let's write some tests.
Our test will be a SQ...
Trim spaces from end of a NSString
...WhiteSpace((__bridge CFMutableStringRef) stringToTrim);
//stringToTrim is now "i needz trim"
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Saving a Numpy array as an image
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@TomášGavenčiak - scipy.misc.imsave is now deprecated in the newer versions of Scipy. An alternative a few comments below is to use imageio.imwrite('image_file.jpg', array)
– Psi-Ed
May 3 at 6:17
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How to create module-wide variables in Python? [duplicate]
...name.
Imagine a file called foo.py, containing this single line:
X = 1
Now imagine you import it.
import foo
print(foo.X) # prints 1
However, let's suppose you want to use one of your module-scope variables as a global inside a function, as in your example. Python's default is to assume tha...
How to determine day of week by passing specific date?
...all dateTime.dayOfWeek() and/or DateTimeFormat.
edit: since Java 8 you can now use java.time package instead of joda-time
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Can a C++ enum class have methods?
...IsYellow() const { return value == Banana; }
private:
Value value;
};
Now you can write:
Fruit f = Fruit::Strawberry;
f.IsYellow();
And the compiler will prevent things like:
Fruit f = 1; // Compile time error.
You could easily add methods such that:
Fruit f("Apple");
and
f.ToString(...