Tutorial by Examples: w

To start using Vue.js, make sure you have the script file included in your HTML. For example, add the following to your HTML. <script src="https://npmcdn.com/vue/dist/vue.js"></script> Simple Example HTML template <div id="app"> {{ message }} </div&...

If you want to support a url parameter more complex than an id number, you may run into trouble with the parser if the value contains a period. Anything following a period will be assumed to be a format (i.e. json, xml). You can work around this limitation by using a constraint to broaden the accep...

Swift func createCollectionView() { let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout() let collectionView = UICollectionView(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height), collectionViewLayout: layout) collectionView.dataSource = sel...

// MARK: - UICollectionViewDelegateFlowLayout extension ViewController: UICollectionViewDelegateFlowLayout { func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize { return ...

struct MetricDistance { var distanceInMeters: Double init(fromCentimeters centimeters: Double) { distanceInMeters = centimeters / 100 } init(fromKilometers kilos: Double) { distanceInMeters = kilos * 1000 } } let myDistance = MetricDistance(fromCentim...

open my $fh, '<', $filename or die "Could not open $filename for reading: $!"; my $contents = do { local $/; <$fh> }; After opening the file (read man perlio if you want to read specific file encodings instead of raw bytes), the trick is in the do block: <$fh>, the ...

Examine the following strings: foobarfoo bar foobar barfoo the regular expression bar will match all four strings, \bbar\b will only match the 2nd, bar\b will be able to match the 2nd and 3rd strings, and \bbar will match the 2nd and 4th strings.

JSFiddle: https://jsfiddle.net/UnsungHero97/80qod7aL/5/ HTML <div class="box_shadow"></div> CSS .box_shadow { width: 100px; height: 100px; margin: 100px; box-shadow: -52px -52px 0px 0px #f65314, 52px -52px 0px 0px #7cbb00, -52px 52px 0px 0px #00...

virtual and override The virtual keyword allows a method, property, indexer or event to be overridden by derived classes and present polymorphic behavior. (Members are non-virtual by default in C#) public class BaseClass { public virtual void Foo() { Console.WriteLine("Foo...

First of all, we need to add our first Fragment at the beginning, we should do it in the onCreate() method of our Activity: if (null == savedInstanceState) { getSupportFragmentManager().beginTransaction() .addToBackStack("fragmentA") .replace(R.id.container, FragmentA.n...

So let's suppose you want to iterate only between some specific lines of a file You can make use of itertools for that import itertools with open('myfile.txt', 'r') as f: for line in itertools.islice(f, 12, 30): # do something here This will read through the lines 13 to 20 as i...

You can use flatMap(_:) in a similar manner to map(_:) in order to create an array by applying a transform to a sequence's elements. extension SequenceType { public func flatMap<T>(@noescape transform: (Self.Generator.Element) throws -> T?) rethrows -> [T] } The difference with...

ansible -i hosts -m ping targethost -i hosts defines the path to inventory file targethost is the name of the host in the hosts file

Returns a random integer between min and max: function randomBetween(min, max) { return Math.floor(Math.random() * (max - min + 1) + min); } Examples: // randomBetween(0, 10); Math.floor(Math.random() * 11); // randomBetween(1, 10); Math.floor(Math.random() * 10) + 1; // randomBet...

If the values in a container have certain operators already overloaded, std::sort can be used with specialized functors to sort in either ascending or descending order: C++11 #include <vector> #include <algorithm> #include <functional> std::vector<int> v = {5,1,2,4,3};...

It's important to let finalization ignore managed resources. The finalizer runs on another thread -- it's possible that the managed objects don't exist anymore by the time the finalizer runs. Implementing a protected Dispose(bool) method is a common practice to ensure managed resources do not have t...

When a controller action is rendered, Rails will attempt to find a matching layout and view based on the name of the controller. Views and layouts are placed in the app/views directory. Given a request to the PeopleController#index action, Rails will search for: the layout called people in app/...

Assuming the route: resources :users, only: [:index] And the controller: class UsersController < ApplicationController def index respond_to do |format| format.html { render } end end end The view app/users/index.html.erb will be rendered. If the view is: Hello &lt...

This function runs an AJAX call using GET allowing us to send parameters (object) to a file (string) and launch a callback (function) when the request has been ended. function ajax(file, params, callback) { var url = file + '?'; // loop through object and assemble the url var notFirst ...

#![feature(start, libc, lang_items)] #![no_std] #![no_main] // The libc crate allows importing functions from C. extern crate libc; // A list of C functions that are being imported extern { pub fn printf(format: *const u8, ...) -> i32; } #[no_mangle] // The main function, with...