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Java abstract interface
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Why is it necessary for an interface to be "declared" abstract?
It's not.
public abstract interface Interface {
\___.__/
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'----> Neither this...
public void interfacing();
public abstr...
What's the difference between => , ()=>, and Unit=>
...y-Name: => Type
The => Type notation stands for call-by-name, which is one of the many ways parameters can be passed. If you aren't familiar with them, I recommend taking some time to read that wikipedia article, even though nowadays it is mostly call-by-value and call-by-reference.
What it ...
Is it unnecessary to put super() in constructor?
Isn't this one automatically put by the compiler if I don't put it in a subclass's constructor?
6 Answers
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Why isn't SQL ANSI-92 standard better adopted over ANSI-89?
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edited Oct 29 '19 at 21:52
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How come an array's address is equal to its value in C?
...ifferent types, so array+1 and &array+1 will not be equal if the array is more than 1 element long).
There are two exceptions to this: when the array name is an operand of sizeof or unary & (address-of), the name refers to the array object itself. Thus sizeof array gives you the size in by...
Merging: Hg/Git vs. SVN
...r where SVN needs manual intervention). Could you post a few step-by-step lists of branch/modify/commit/...-operations that show where SVN would fail while Hg/Git happily moves on? Practical, not highly exceptional cases please...
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What is the difference between ExecuteScalar, ExecuteReader and ExecuteNonQuery?
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ExecuteScalar is typically used when your query returns a single value. If it returns more, then the result is the first column of the first row. An example might be SELECT @@IDENTITY AS 'Identity'.
ExecuteReader is used for any result se...
Why is it slower to iterate over a small string than a small list?
I was playing around with timeit and noticed that doing a simple list comprehension over a small string took longer than doing the same operation on a list of small single character strings. Any explanation? It's almost 1.35 times as much time.
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What are the differences between various threading synchronization options in C#?
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Great question. I maybe wrong.. Let me try.. Revision#2 of my orig answer.. with a little bit of more understanding. Thanks for making me read :)
lock(obj)
is a CLR construct that for (intra-object?) thread synchronization. Ensures that only one thread can take ownersh...
Proper use cases for Android UserManager.isUserAGoat()?
I was looking at the new APIs introduced in Android 4.2 .
While looking at the UserManager class I came across the following method:
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