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How to maintain a Unique List in Java?
...contain no pair of elements e1 and e2 such that e1.equals(e2), and at most one null element. As implied by its name, this interface models the mathematical set abstraction.
Note: Great care must be exercised if mutable objects are used as set elements. The behavior of a set is not specified if ...
Generate a heatmap in MatPlotLib using a scatter data set
...rstand that imshow() is on the same category of functions as scatter(). I honestly don't understand why imshow() converts a 2d array of floats into blocks of appropriate color, whereas I do understand what scatter() is supposed to do with such an array.
– gotgenes
...
JSON.net: how to deserialize without using the default constructor?
...rs to use the default (parameterless) constructor on an object if there is one. If there are multiple constructors and you want Json.Net to use a non-default one, then you can add the [JsonConstructor] attribute to the constructor that you want Json.Net to call.
[JsonConstructor]
public Result(int...
is there a Java equivalent to null coalescing operator (??) in C#? [duplicate]
...imported using import static syntax)
public static <T> T coalesce(T one, T two)
{
return one != null ? one : two;
}
The above is equivalent to Guava's method firstNonNull by @ColinD, but that can be extended more in general
public static <T> T coalesce(T... params)
{
for (T p...
In a URL, should spaces be encoded using %20 or +? [duplicate]
...he spaces using %20 or + ? For example, in the following example, which one is correct?
6 Answers
...
Delete all the queues from RabbitMQ?
... list queues name
Then from the list, you'll need to manually delete them one by one:
rabbitmqadmin delete queue name='queuename'
Because of the output format, doesn't appear you can grep the response from list queues. Alternatively, if you're just looking for a way to clear everything (read: re...
What is the best way to filter a Java Collection?
...
Java 8 (2014) solves this problem using streams and lambdas in one line of code:
List<Person> beerDrinkers = persons.stream()
.filter(p -> p.getAge() > 16).collect(Collectors.toList());
Here's a tutorial.
Use Collection#removeIf to modify the collection in place. (Not...
“Unknown provider: aProvider
...site in Chrome, with the DevTools open. Which results in an error like the one below being logged:
The method in the call trace we're interested in, is the one I marked with an arrow. This is providerInjector in injector.js. You're going to want to place a breakpoint where it throws an exception:...
Time complexity of Euclid's Algorithm
...
One trick for analyzing the time complexity of Euclid's algorithm is to follow what happens over two iterations:
a', b' := a % b, b % (a % b)
Now a and b will both decrease, instead of only one, which makes the analysis ea...
how to show progress bar(circle) in an activity having a listview before loading the listview with d
...f showing a progress bar (circle) while loading an activity. In your case, one with a ListView in it.
IN ACTIONBAR
If you are using an ActionBar, you can call the ProgressBar like this (this could go in your onCreate()
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setProgressBarI...