Tutorial by Examples: ti

import scala.concurrent.Future import scala.concurrent.ExecutionContext.Implicits.global object FutureDivider { def divide(a: Int, b: Int): Future[Int] = Future { // Note that this is integer division. a / b } } Quite simply, the divide method creates a Future tha...

The previous examples demonstrated the individual features of a Future, handling success and failure cases. Usually, however, both features are handled much more tersely. Here's the example, written in a neater and more realistic way: object Calculator { def calculateAndReport(a: Int, b: Int...

To convert exceptions into Either or Option types, you can use methods that provided in scala.util.control.Exception import scala.util.control.Exception._ val plain = "71a" val optionInt: Option[Int] = catching(classOf[java.lang.NumberFormatException]) opt { plain.toInt } val eitherI...

If you implement a text-search as LIKE-query, you usually do it like this: SELECT * FROM T_Whatever WHERE SomeField LIKE CONCAT('%', @in_SearchText, '%') However, (apart from the fact that you shouldn't necessarely use LIKE when you can use fulltext-search) this creates a problem when someb...

You can override the default vmoptions with your own personal settings by choosing Help > Edit Custom VM Options from the Android Studio toolbar. This will create a local copy which you are free to edit. Alternatively, you can edit the default vmoptions directly using the paths given below. Note...

To read default configuration properties: package com.example; public class ExampleApplication { private Properties getDefaults() throws IOException { Properties defaults = new Properties(); try (InputStream defaultsStream = ExampleApplication.class.getResou...

To find the largest or smallest element stored in a vector, you can use the methods std::max_element and std::min_element, respectively. These methods are defined in <algorithm> header. If several elements are equivalent to the greatest (smallest) element, the methods return the iterator to th...

Transformations can be concatenated and are applied right to left Rotate a rectangle by 90 degrees and then move it down by 20 units and to the right by 20 units: <svg xmlns="http://www.w3.org/2000/svg"> <rect x="-10" y="-20" width="20" height=...

Cask is a project management tool which can be also used to easily manage your local emacs configuration. Installing cask is easy. You can either run the following command on the command-line: curl -fsSL https://raw.githubusercontent.com/cask/cask/master/go | python Or if you are on a mac, you...

Use ionic serve to start a local development server for app dev and testing. This is useful for both desktop browser testing, and to test within a device browser which is connected to the same network. Additionally, this command starts LiveReload which is used to monitor changes in the file system. ...

//iterates over a map, getting the key and value at once var map = hashMapOf(1 to "foo", 2 to "bar", 3 to "baz") for ((key, value) in map) { println("Map[$key] = $value") }

Detailed instructions on getting artifactory set up or installed.

// Get the battery API navigator.getBattery().then(function(battery) { // Battery level is between 0 and 1, so we multiply it by 100 to get in percents console.log("Battery level: " + battery.level * 100 + "%"); });

// Get the battery API navigator.getBattery().then(function(battery) { console.log( "Battery will drain in ", battery.dischargingTime, " seconds" ); });

// Get the battery API navigator.getBattery().then(function(battery) { console.log( "Battery will get fully charged in ", battery.chargingTime, " seconds" ); });

In the previous example we saw how mixed data types can be inserted into a JSON field. What if we want to update that field? We are going to add scheveningen to the array named variations in the previous example. UPDATE myjson SET dict=JSON_ARRAY_APPEND(dict,'$.variations','schevening...

Clickjacking is a malicious technique of tricking a Web user into clicking on something different from what the user perceives they are clicking on. Learn more To enable clickjacking protection, add the XFrameOptionsMiddleware to your middleware classes. This should already be there if you didn...

In Java (and other languages), using null is a common way of indicating that there is no value attached to a reference variable. In Scala, using Option is preferred over using null. Option wraps values that might be null. None is a subclass of Option wrapping a null reference. Some is a subclass of...

Global installation using the PHP Archive wget https://phar.phpunit.de/phpunit.phar # download the archive file chmod +x phpunit.phar # make it executable sudo mv phpunit.phar /usr/local/bin/phpunit # move it to /usr/local/bin phpunit --version ...

Send a 304 Not Modified response status from the server send in response to a client request that contains headers If-Modified-Since and If-None-Match, if the request resource hasn’t changed. For example if a client request for a web page includes the header If-Modified-Since: Fri, 22 Jul 2016 14:3...