Lambda expressions can be used to handle events, which is useful when:
The handler is short.
The handler never needs to be unsubscribed.
A good situation in which a lambda event handler might be used is given below:
smtpClient.SendCompleted += (sender, args) => Console.WriteLine("Ema...
Cloning a huge repository (like a project with multiple years of history) might take a long time, or fail because of the amount of data to be transferred. In cases where you don't need to have the full history available, you can do a shallow clone:
git clone [repo_url] --depth 1
The above comman...
git checkout --orphan new-orphan-branch
The first commit made on this new branch will have no parents and it will be the root of a new history totally disconnected from all the other branches and commits.
source
You can use any element as an handle to drag another element around:
<script>
$(function() {
$( "#draggable" ).draggable({
handle: ".handle"
});
});
</script>
<div id="draggable">
<span class="handle"&...
SharedPreferences Manager (Singleton) class to read and write all types of data.
import android.content.Context;
import android.content.SharedPreferences;
import android.util.Log;
import com.google.gson.Gson;
import java.lang.reflect.Type;
/**
* Singleton Class for accessing SharedPref...
Executing code after 1.5 seconds:
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
//The code you want to run after the time is up
}
}, 1500); //the time you want to delay in milliseconds
Executing code repeatedly every...
The where method on any ActiveRecord model can be used to generate SQL of the form WHERE column_name IN (a, b, c, ...). This is achieved by passing an array as argument.
As a simple example, we will use the following model:
class Person < ActiveRecord::Base
#attribute :first_name, :string
...
This code selects data out of a table:
SELECT Column1, Column2, Column3 FROM MySourceTable;
This code creates a new table called MyNewTable and puts that data into it
SELECT Column1, Column2, Column3
INTO MyNewTable
FROM MySourceTable;
You can access SharedPreferences in several ways:
Get the default SharedPreferences file:
import android.preference.PreferenceManager;
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
Get a specific SharedPreferences file:
public static final String PREF_FILE_NAM...
SRXMPPDemo
Download the example and all the classes here - https://github.com/SahebRoy92/SRXMPPDemo
A demo on XMPP in Objective C, with various simple and complex features implemented in it. All the features of XMPP is done by "in band" xmpp functions.
Few features this project contains...
Define your class that will represent your custom error.
public class ErrorDto
{
public int Code { get; set; }
public string Message { get; set; }
// other fields
public override string ToString()
{
return JsonConvert.SerializeObject(this);
}
}
Then put nex...
With the rgdal package it is possible to import and export shapfiles with R.
The function readOGR can be used to imports shapfiles. If you want to import a file from e.g. ArcGIS the first argument dsn is the path to the folder which contains the shapefile. layer is the name of the shapefile without...
The String List passed as a parameter to the share() method contains the paths of all the files you want to share.
It basically loops through the paths, adds them to Uri, and starts the Activity which can accept Files of this type.
public static void share(AppCompatActivity context,List<Strin...
getPreferences(int)
returns the preferences saved by Activity's class name as described in the docs :
Retrieve a SharedPreferences object for accessing preferences that are private to this activity. This simply calls the underlying getSharedPreferences(String, int) method by passing in this acti...
Look at the contents of /etc/redhat-release
cat /etc/redhat-release
Here is the output from a Fedora 24 machine: Fedora release 24 (Twenty Four)
As mentioned in the debian-based response, you can also use the lsb_release -a command, which outputs this from a Fedora 24 machine:
LSB Version: ...
ReactJS is an open-source, component based front end library responsible only for the view layer of the application. It is maintained by Facebook.
ReactJS uses virtual DOM based mechanism to fill in data (views) in HTML DOM. The virtual DOM works fast owning to the fact that it only changes individ...
Twig is a templating language that compiles to optimized PHP code. It is primarily used for outputting HTML, but can also be used to output any other text-based format. It is a standalone component that can be easily integrated into any PHP project.
It provides many excellent features:
Autoescap...
To get your most recent stash after running git stash, use
git stash apply
To see a list of your stashes, use
git stash list
You will get a list that looks something like this
stash@{0}: WIP on master: 67a4e01 Merge tests into develop
stash@{1}: WIP on master: 70f0d95 Add user role to lo...
When accessing arrays with pointers, there are no bounds check and therefore no IndexOutOfRangeException will be thrown. This makes the code faster.
Assigning values to an array with a pointer:
class Program
{
static void Main(string[] args)
{
unsafe
{
int...
