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Using Linq to get the last N elements of a collection?
...ensions
{
// Ex: collection.TakeLast(5);
public static IEnumerable<T> TakeLast<T>(this IEnumerable<T> source, int N)
{
return source.Skip(Math.Max(0, source.Count() - N));
}
}
A brief note on performance:
Because the call to Count() can cause enumeration ...
How to create an alias for a command in Vim?
..., but only if it is neither followed nor preceded by word character, so :W<CR> will be replaced with :w<CR>, but :Write won’t. (Note that this affects any commands that match, including ones that you might not expect. For example, the command :saveas W Z will be replaced by :saveas w Z...
Installation error: INSTALL_PARSE_FAILED_MANIFEST_MALFORMED?
...ageParser(32707): /data/local/tmp/foo.apk (at Binary XML file line #214): <provider> does not include authorities attribute
D/Finsky (32707): [716] PackageVerificationService.getPackageInfo: Cannot read archive for file:///data/local/tmp/foo.apk in request id=6
D/Finsky (32707): [1] PackageV...
Why does Eclipse automatically add appcompat v7 library support whenever I create a new project?
...iew, it is considered good practice to include the support library by default because of the large diversity of devices and the fragmentation that exists between the different versions of Android (and thus, of the provided APIs).
This is the reason why Android code templates tools included in Eclip...
What guarantees are there on the run-time complexity (Big-O) of LINQ methods?
...thods that use indexed access, such as ElementAt, Skip, Last or LastOrDefault, will check to see whether or not the underlying type implements IList<T>, so that you get O(1) access instead of O(N).
The Count method checks for an ICollection implementation, so that this operation is O(1) instea...
Java 8 List into Map
...
Based on Collectors documentation it's as simple as:
Map<String, Choice> result =
choices.stream().collect(Collectors.toMap(Choice::getName,
Function.identity()));
...
Right Align button in horizontal LinearLayout
...
Use below code for that
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="35dp"
android:orientation="horizon...
Animate the transition between fragments
...);
and here's the relevant animator XML from res/animator/fade_in.xml:
<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:interpolator/accelerate_quad"
android:valueFrom="0"
android:valueTo="1"
android:propertyName="alpha"
...
What is the difference between synchronous and asynchronous programming (in node.js)
...ile system operations, while the main Node thread keeps executing your javascript code. In an event-driven server like Node, the file system thread notifies the main Node thread of certain events such as completion, failure, or progress, along with any data associated with that event (such as the re...
Predicate Delegates in C#
...o a function that returns true or false. Predicates are very useful for filtering a list of values - here is an example.
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
List<int> list = new List<int> { 1, 2, 3 };
Predicate...