Tutorial by Examples: ga

Import Element Tree module and open xml file, get an xml element import xml.etree.ElementTree as ET tree = ET.parse('sample.xml') root=tree.getroot() element = root[0] #get first child of root element Element object can be manipulated by changing its fields, adding and modifying attributes, a...

To publish a crate on crates.io, you must log in with Cargo (see 'Connecting Cargo to a Crates.io Account'). You can package and publish your crate with the following commands: cargo package cargo publish Any errors in your Cargo.toml file will be highlighted during this process. You should en...

Adding a Product to a Shopping Cart The following example demonstrates how to Add a product (or anything) to a Database Table asynchronously, using AJAX, and TypeScript. declare var document; declare var xhr: XMLHttpRequest; window.onLoad = () => { Start(); }; function Start() { ...

Outer joins return all the rows from one or both tables, plus matching rows. Table People PersonID FirstName 1 Alice 2 Bob 3 Eve Table Scores PersonID Subject Score 1 Math 100 2 Math 54 2 Science 98 Left joining the tables: Select * f...

This example illustrates how to read various-type struct entries from MATLAB, and pass it to C equivalent type variables. While it is possible and easy to figure out from the example how to load fields by numbers, it is here achieved via comparing the field names to strings. Thus the struct fields ...

from selenium import webdriver # Create a new webdriver driver = webdriver.Chrome() # Get a page that has a popup window (Use mouse to click "try it" button) driver.get("http://www.w3schools.com/js/tryit.asp?filename=tryjs_alert") # Accept the opened alert driver.switch_t...

If one does not want to receive any alert for a specific host or service - at least momentarily - one can squelch it. alert thisis.down { macro = host.mymacro template = mytemplate $notes = This alert will... $metric = "avg:os.service.running{host=*,name=... warn = min( a($metri...

audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE); audioManager.requestAudioFocus(audioListener, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN); changedListener = new AudioManager.OnAudioFocusChangeListener() { @Override public void onAudioFocusChange(in...

A value_ptr is a smart pointer that behaves like a value. When copied, it copies its contents. When created, it creates its contents. // Like std::default_delete: template<class T> struct default_copier { // a copier must handle a null T const* in and return null: T* operator()(T co...

Generally, it's not a good idea to use a regular expression to parse a complex structure. But it can be done. For instance, you might want to load data into hive table and fields are separated by comma but complex types like array are separated by a "|". Files contain records with all fiel...

The BukkitRunnable is a Runnable found in Bukkit. It's possible to schedule a task directly from a BukkitRunnable, and also cancel it from inside itself. Important: The time on the tasks is measured in Ticks. A second has 20 ticks. Non-RepeatingTask: JavaPlugin plugin; //Your plugin instance ...

Classes implement an interface to meet the interface's contract. For example, a C# class may implement IDisposable, public class Resource : IDisposable { private MustBeDisposed internalResource; public Resource() { internalResource = new MustBeDisposed(); } ...

Since Qt 5.5 we have a new wonderful TreeView, a control we've all been waiting for. A TreeView implements a tree representation of items from a model. In general it looks like other QML views - ListView or TableView. But data structure of TreeView is more complex. A data in ListView or TableView...

Even if the result type of the query isn’t an entity type, if the result contains entity types they will still be tracked by default Example : In the following query, which returns an anonymous type, the instances of Book in the result set will be tracked using (var context = new BookC...

Every Keychain Item is most often represented as a CFDictionary. You can, however, simply use NSDictionary in Objective-C and take advantage of bridging, or in Swift you may use Dictionary and explicitly cast to CFDictionary. You could construct a password with the following dictionary: Swift var...

To construct a query, we need to represent it as a CFDictionary. You may also use NSDictionary in Objective-C or Dictionary in Swift and cast to CFDictionary. We need a class key: Swift var dict = [String : AnyObject]() dict[kSecClass as String] = kSecClassGenericPassword Next, we can specify...

As usual, we first need a CFDictionary to represent the item we want to update. This must contain all of the old values for the item, including the old private data. Then it takes a CFDictionary of any attributes or the data itself that you would like to change. So first, let's construct a class ke...

We need only one thing in order to delete an item from the Keychain: a CFDictionary with attributes describing the items to be deleted. Any items that match the query dictionary will be deleted permanently, so if you are only intending to delete a single item be sure to be specific with your query. ...

# ... # same as above @app.route('/welcome/<name>') def welcome(name): return render_template('main.html', name=name) @app.route('/login', methods=['GET', 'POST']) def login(): if request.method == 'POST': # ... # check for valid login, assign username ...

If you want to add a UIImageView to the center of the screen with width and height of 100 pixel, you need to set center x constraint and center y constraint to the superview from the UIImageView and width, height constraint to the UIIMageView. Here is the code. There is way to do this in storyboard ...