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What does the question mark in Java generics' type parameter mean?
This is a small snippet of code taken from some of the examples that accompany the Stanford Parser. I've been developing in Java for about 4 years, but have never had a very strong understanding of what this style of code is supposed to indicate.
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... edited Aug 31 '17 at 3:53
JohnAllen
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answered Jan 19 '13 at 2:31
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Can I simultaneously declare and assign a variable in VBA?
...s on the same line (ie var1 = val1: var2 = val2). It will bug out speradically and allow you to do this type of assignment sometimes but as a whole not suggested by this notation.
– GoldBishop
Oct 10 '12 at 14:17
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What reason is there to use null instead of undefined in JavaScript?
...t undefined is always preferable and serves the same purpose programmatically. What are some practical reasons to use null instead of undefined ?
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What do 3 dots next to a parameter type mean in Java?
...ks/tutorial/java/javaOO/arguments.html#varargs
In your example, you could call it as any of the following:
myMethod(); // Likely useless, but possible
myMethod("one", "two", "three");
myMethod("solo");
myMethod(new String[]{"a", "b", "c"});
Important Note: The argument(s) passed in this way is alwa...
How can I configure Logback to log different levels for a logger to different destinations?
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Update: For an all configuration based approach using Groovy see Dean Hiller's answer.
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You can do some interesting things with Logback filters. The below configuration will only print warn and error messages to stderr, and everything e...
How do you get the magnitude of a vector in Numpy?
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"Should be a property of an array: x.norm()" I totally agree. Usually when working with numpy I use my own Array and Matrix subclasses that have all functions I commonly use pulled in as methods. Matrix.randn([5,5])
– mdaoust
Feb 7 '12...
How does Junit @Rule work?
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Rules are used to add additional functionality which applies to all tests within a test class, but in a more generic way.
For instance, ExternalResource executes code before and after a test method, without having to use @Before and @After. Using an ExternalResource rather than @Before a...
Find first element in a sequence that matches a predicate
...yntax with () creates a generator, which is more efficient than generating all the list at once with [].
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How to get equal width of input and select fields
...the form, I have one select and two input fields. These elements are vertically aligned. Unfortunately, I can't get equal width of these elements.
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