Tutorial by Examples: c

Go to Xcode and open your project. In your app target, navigate to Capabilities tab. Turn on Background Modes.

Background fetch is a new mode that lets your app appear always up-to-date with the latest information while minimizing the impact on battery. You could download feeds within fixed time intervals with this capability. To get started: 1- Check Background Fetch in capabilities screen in Xcode. 2- I...

1- Run the app on a real device and attach it to Xcode debugger. 2- From Debug menu, select Simulate Background Fetch: 3- Now Xcode will pause the app with SIGSTOP signal. Just tap the continue button to let the app do the background fetch. Now you will see that data is fetched and ready for ...

By default, when you are streaming an audio, by exiting the app it will stop, but you can prevent this by turning on the first check box in Background capability page in Xcode. iOS will automatically handle this for you, and you don't need to write any code!

To avoid unsightly #DIV/0 errors in a spreadsheet, a custom function can be used. /** * Divides n by d unless d is zero, in which case, it returns * the given symbol. * * @param {n} number The numerator * @param {d} number The divisor * @param {symbol} string The symbol to display...

Creating a Scala function that receives an python RDD is easy. What you need to build is a function that get a JavaRDD[Any] import org.apache.spark.api.java.JavaRDD def doSomethingByPythonRDD(rdd :JavaRDD[Any]) = { //do something rdd.map { x => ??? } }

This part of development you should serialize the python RDD to the JVM. This process uses the main development of Spark to call the jar function. from pyspark.serializers import PickleSerializer, AutoBatchedSerializer rdd = sc.parallelize(range(10000)) reserialized_rdd = rdd._reserialize(Aut...

To call this code you should create the jar of your scala code. Than you have to call your spark submit like this: spark-submit --master yarn-client --jars ./my-scala-code.jar --driver-class-path ./my-scala-code.jar main.py This will allow you to call any kind of scala code that you need in your...

Sometimes, the straight forward loop cannot be entirely contained within the loop body. This is because, the loop needs to be primed by some statements B. Then, the iteration begins with some statements A, which are then followed by B again before looping. do_B(); while (condition) { do_A(); ...

Using many ECHO commands to create a batch file: ( echo echo hi, this is the date today echo date /T echo echo created on %DATE% echo pause >nul )>hi.bat The command interpreter treats the whole section in parenthesis as a single command, then saves all the output to hi.bat. ...

Ant provides some built-in properties Property NameValuebasedirthe absolute path of the project's basedirant.filethe absolute path of the buildfile.ant.versionthe version of Antant.project.default-targetthe name of the currently executing project's default targetant.project.namename of the projecta...

There are four ways to work with JavaScript plugins, Ember add-on Import JavaScript plugins globally Consume named AMD plugins Via ember-browserify

When using d3.request() or one of the convenience constructors (d3.json, d3.csv, d3.tsv, d3.html and d3.xml) there are many sources for error. There may be problems with the issued request or its response due to network errors, or the parsing might fail if the content is not well-formed. Within the...

Like page caching, action caching caches the whole page. The difference is that the request hits the Rails stack so before filters are run before the cache is served. It's extracted from Rails to actionpack-action_caching gem. A common example is caching of an action that requires authentication: ...

Sample Data: CREATE TABLE table_name ( id, list ) AS SELECT 1, 'a,b,c,d' FROM DUAL UNION ALL -- Multiple items in the list SELECT 2, 'e' FROM DUAL UNION ALL -- Single item in the list SELECT 3, NULL FROM DUAL UNION ALL -- NULL list SELECT 4, 'f,,g' FROM DUAL; -- NULL item...

In config.ini: [DEFAULT] debug = True name = Test password = password [FILES] path = /path/to/file In Python: from ConfigParser import ConfigParser config = ConfigParser() #Load configuration file config.read("config.ini") # Access the key "debug" in "DEF...

Decryption Code public static string Decrypt(string cipherText) { if (cipherText == null) return null; byte[] cipherBytes = Convert.FromBase64String(cipherText); using (Aes encryptor = Aes.Create()) { Rfc2898DeriveBytes pdb = ...

If you want to replace parts of your website, ajax is an easy way to do it. The website.html where you want to replace the content based on the selected value: <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"> ...

In Twig template, Request object is available at {{ app.request }} When you want display request method in Twig, try this: <p>Request method: {{ app.request.method }}</p> In PHP template <p>Request method: <?php echo $app->getRequest()->getMethod() ?></p>...

This is a jumbotron with a title, a content and a button. Code <div class="jumbotron"> <h1>Title text</h1> <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec tortor ipsum, convallis sit.</p> <p><a class="btn btn-default&...