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What is the significance of load factor in HashMap?
HashMap has two important properties: size and load factor . I went through the Java documentation and it says 0.75f is the initial load factor. But I can't find the actual use of it.
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Java exception not caught?
...ptly for reason S, then the try statement completes abruptly for reason S (and reason R is discarded).
So, when there is a catch block that throws an exception:
try {
// ...
} catch (Exception e) {
throw new Exception("2");
}
but there is also a finally block that also throws an exceptio...
How to test that no exception is thrown?
...I have noticed this question garners interest from time to time so I'll expand a little.
Background to unit testing
When you're unit testing it's important to define to yourself what you consider a unit of work. Basically: an extraction of your codebase that may or may not include multiple methods...
How can I exclude directories from grep -R?
...
SOLUTION 1 (combine find and grep)
The purpose of this solution is not to deal with grep performance but to show a portable solution : should also work with busybox or GNU version older than 2.5.
Use find, for excluding directories foo and bar :
find...
classical inheritance vs prototypal inheritance in javascript
I have googled so many links and can't get good idea about the difference between classical inheritance and prototypal inheritance?
...
What is the difference between ExecuteScalar, ExecuteReader and ExecuteNonQuery?
...at are the different cases when we use these three? Where should I use one and where should I not?
9 Answers
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Mockito - difference between doReturn() and when()
...e thing or what is the subtle difference between doReturn(...).when(...) and when(...).thenReturn(...) ?
5 Answers
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How to serialize SqlAlchemy result to JSON?
... {}
for field in [x for x in dir(obj) if not x.startswith('_') and x != 'metadata']:
data = obj.__getattribute__(field)
try:
json.dumps(data) # this will fail on non-encodable values, like other classes
fields[field]...
Java: recommended solution for deep cloning/copying an instance
...ializationUtils - using serialization - if all classes are in your control and you can force implementing Serializable.
Java Deep Cloning Library - using reflection - in cases when the classes or the objects you want to clone are out of your control (a 3rd party library) and you can't make them impl...
Accessing localhost:port from Android emulator
...ith the IP address "10.0.2.2".
This has been designed in this way by the Android team. So your webserver can perfectly run at localhost and from your Android app you can access it via "http://10.0.2.2:<hostport>".
If your emulator must access the internet through a proxy server, you can con...