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Java: Detect duplicates in ArrayList?
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@PaulJackson Sizing based on the full list will probably be beneficial. However if the common case is for it to find a duplicate early then the space was wasted. Also even sizing the HashSet to the size of the list will result in resizing when r...
When to use Comparable and Comparator
...bject in question, a common practice is to use a technical or natural (database?) identifier of the object for this.
Use Comparator if you want to define an external controllable ordering behaviour, this can override the default ordering behaviour.
...
vs
... that will be present is the meta charset attribute. You should also set a base tag for the same reason ... on the server, the base tag is unnecessary, but when opened from local storage, the base tag enables the page to work as if it is on the server, with all the assets in place and so on, no brok...
What is the difference between declarative and procedural programming paradigms?
...that exhibit a hierarchy of types that inherit both methods and state from base types to derived types, but also includes the unusual prototype-based JavaScript.
Examples of programming languages which support the OO paradigm:
Java
Declarative
There are several sub-paradigms of the declarativ...
Business logic in MVC [closed]
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Fist of all:
I believe that you are mixing up the MVC pattern and n-tier-based design principles.
Using an MVC approach does not mean that you shouldn't layer your application.
It might help if you see MVC more like an extension of the presentation layer.
If you put non-presentation code inside th...
How to print colored text in Python?
...acters 176, 177, 178 and 219 are the "block characters".
Some modern text-based programs, such as "Dwarf Fortress", emulate text mode in a graphical mode, and use images of the classic PC font. You can find some of these bitmaps that you can use on the Dwarf Fortress Wiki see (user-made tilesets).
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Print in one line dynamically
...tten '\r' in Python (and many other languages). Here's a complete example based on your code:
from sys import stdout
from time import sleep
for i in range(1,20):
stdout.write("\r%d" % i)
stdout.flush()
sleep(1)
stdout.write("\n") # move the cursor to the next line
Some things about t...
Generic List - moving an item within the list
...nt newIndex)
Underneath it is basically implemented like this.
T item = base[oldIndex];
base.RemoveItem(oldIndex);
base.InsertItem(newIndex, item);
So as you can see the swap method that others have suggested is essentially what the ObservableCollection does in it's own Move method.
UPDATE 20...
Abstract Class vs Interface in C++ [duplicate]
...ve body" - there is no can, pure virtual by definition have no body in the base class and they must have a body in the derived class. Also, you do not require the virtual keyword for multiple inheritance in C++. In fact, good design that uses multiple inheritance avoids the virtual keyword (well, th...
Window vs Page vs UserControl for WPF navigation?
...WPF because I prefer to put dynamic content in my main Window that changes based on user action.
A Page is a page inside your Window. It is mostly used for web-based systems like an XBAP, where you have a single browser window and different pages can be hosted in that window. It can also be used in...