Tutorial by Examples: r

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 may define scripts in your package.json, for example: { "name": "your-package", "version": "1.0.0", "description": "", "main": "index.js", "author": "", "license": &qu...

You can use a RecyclerView.ItemDecoration to put extra margins around each item in a RecyclerView. This can in some cases clean up both your adapter implementation and your item view XML. public class MyItemDecoration extends RecyclerView.ItemDecoration { private final int extraMargin; ...

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"&...

Retrofit requests can be logged using an intercepter. There are several levels of detail available: NONE, BASIC, HEADERS, BODY. See Github project here. Add dependency to build.gradle: compile 'com.squareup.okhttp3:logging-interceptor:3.8.1' Add logging interceptor when creating Retrofit:...

MSDN: The return statement terminates execution of the method in which it appears and returns control to the calling method. It can also return an optional value. If the method is a void type, the return statement can be omitted. public int Sum(int valueA, int valueB) { return valueA +...

You can group multiple boolean logic statements within parenthesis in order to create a more complex logic evaluation, especially useful in if statements. if ((age >= 18 && height >= 5.11) || (status === 'royalty' && hasInvitation)) { console.log('You can enter our club'); ...

Blade provides convenient syntax for common PHP control structures. Each of the control structures begins with @[structure] and ends with @[endstructure]. Notice that within the tags, we are just typing normal HTML and including variables with the Blade syntax. Conditionals 'If' statements @if...

Any PHP expression within double curly braces {{ $variable }} will be echoed after being run through the e helper function. (So html special characters (<, >, ", ', &) are safely replaced for the corresponding html entities.) (The PHP expression must evaluate to string, otherwise an ...

With Blade, you can also include partial views (called 'partials') directly into a page like so: @include('includes.info', ['title' => 'Information Station']) The code above will include the view at 'views/includes/info.blade.php'. It will also pass in a variable $title having value 'Informat...

After setting up Xcode, it is not difficult to get your first iOS up and running. In the following example we will: Start a new project Add a label Printing message to console. Run in the simulator Starting a new project When the Xcode welcome screen comes up, choose Create a new Xcode pr...

With local image Swift let image = UIImage(named: "imageFromBundleOrAsset") Objective-C UIImage *image = [UIImage imageNamed:@"imageFromBundleOrAsset"]; Note The method imageNamed caches the image's contents to memory. Loading many large images that way can cause low...

The most "popular" way of reversing a string in JavaScript is the following code fragment, which is quite common: function reverseString(str) { return str.split('').reverse().join(''); } reverseString('string'); // "gnirts" However, this will work only so long as ...

In case you have a Named Range in your Sheet, and you want to dynamically get the last row of that Dynamic Named Range. Also covers cases where the Named Range doesn't start from the first Row. Sub FindingLastRow() Dim sht As Worksheet Dim LastRow As Long Dim FirstRow As Long Set sht =...

Just like char and int, a function is a fundamental feature of C. As such, you can declare a pointer to one: which means that you can pass which function to call to another function to help it do its job. For example, if you had a graph() function that displayed a graph, you could pass which functio...

import { Http, Request, RequestOptionsArgs, Response, RequestOptions, ConnectionBackend, Headers } from '@angular/http'; import { Router } from '@angular/router'; import { Observable } from 'rxjs/Observable'; import 'rxjs/add/observable/empty'; import 'rxjs/add/observable/throw'; import 'rxjs/a...

After extending the Http class, we need to tell angular to use this class instead of Http class. In order to do this, in our main module(or depending on the needs, just a particular module), we need to write in the providers section: export function httpServiceFactory(xhrBackend: XHRBackend, reque...

You can archive different Textsizes inside a Textview with a Span TextView textView = (TextView) findViewById(R.id.textView); Spannable span = new SpannableString(textView.getText()); span.setSpan(new RelativeSizeSpan(0.8f), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); textView.setText(span)...

A regular expression with grouped parts can be used as an extractor: scala> val address = """(.+):(\d+)""".r address: scala.util.matching.Regex = (.+):(\d+) scala> val address(host, port) = "some.domain.org:8080" host: String = some.domain.org por...

There are several ways to create an Observable in RxJava. The most powerful way is to use the Observable.create method. But it's also the most complicated way. So you must avoid using it, as much as possible. Emitting an exiting value If you already have a value, you can use Observable.just to emi...