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Reading a plain text file in Java
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ASCII is a TEXT file so you would use Readers for reading. Java also supports reading from a binary file using InputStreams. If the files being read are huge then you would want to use a BufferedReader on top of a FileReader to imp...
What happens if a finally block throws an exception?
...r finally block will not be completed beyond the point where the exception is thrown.
If the finally block was executing during the handling of an earlier exception then that first exception is lost.
C# 4 Language Specification § 8.9.5: If the finally block throws another exception, processin...
How to use @Nullable and @Nonnull annotations more effectively?
... method's parameters and also avoid checking invariants.
Another good tip is never returning null values, but using Null Object Pattern instead.
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Constructor function vs Factory functions
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The basic difference is that a constructor function is used with the new keyword (which causes JavaScript to automatically create a new object, set this within the function to that object, and return the object):
var objFromConstructor = new Con...
Is it Pythonic to use list comprehensions for just side effects?
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It is very anti-Pythonic to do so, and any seasoned Pythonista will give you hell over it. The intermediate list is thrown away after it is created, and it could potentially be very, very large, and therefore expensive to create...
What does this thread join code mean?
In this code, what does the two joins and break mean? t1.join() causes t2 to stop until t1 terminates?
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What's the best practice for primary keys in tables?
When designing tables, I've developed a habit of having one column that is unique and that I make the primary key. This is achieved in three ways depending on requirements:
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MySQL: Transactions vs Locking Tables
..., in and of themselves, will NOT ensure that your logic comes out in a consistent state.
Think of a banking system. When you pay a bill online, there's at least two accounts affected by the transaction: Your account, from which the money is taken. And the receiver's account, into which the money is...
Why can I initialize a List like an array in C#?
Today I was surprised to find that in C# I can do:
6 Answers
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What's the difference between text/xml vs application/xml for webservice response
This is more of a general question about the difference between text/xml and application/xml .
I am fairly new to writing webservices (REST - Jersey). I have been producing application/xml since it is what shows up in most tutorials / code examples that I have been using to learn, but I recentl...