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To change PS1, you just have to change the value of PS1 shell variable. The value can be set in ~/.bashrc or /etc/bashrc file, depending on the distro. PS1 can be changed to any plain text like: PS1="hello " Besides the plain text, a number of backslash-escaped special characters are s...

To sort elements efficiently (all at once and with minimal DOM interruption), we need to: Find the elements Sort based on a set condition Insert back in the DOM <ul id='my-color-list'> <li class="disabled">Red</li> <li>Green</li> <li ...

Matlab supports synchronous and asynchronous communication with a serial port. It is important to chose the right communication mode. The choice will depend on: how the instrument you are communicating with behave. what other functions your main program (or GUI) will have to do aside from managi...

You can convert a numeric string to various Java numeric types as follows: String to int: String number = "12"; int num = Integer.parseInt(number); String to float: String number = "12.0"; float num = Float.parseFloat(number); String to double: String double = "1...

namespace App\Controller; class PostsController extends AppController { public function initialize(){ parent::initialize(); // code that you want to run before every action } public function view($id) { //Your code here } }

The beforeFilter() method executes before any other method executes in the controller. First use the Event namespace before defining the class in your controller file. use Cake\Event\Event; In your controller, add the beforeFilter() method as shown below. public function beforeFilter(Event $ev...

Pass each variable to view at a time $this->set('color', 'pink'); $this->set('color', $color); Pass multiple variables to view together via compact() function $color1 = 'pink'; $color2 = 'red'; $this->set(compact('color1', 'color2'));

You can retrieve post data as Array. $post_data= $this->request->data; You can retrieve post data for particular key. $this->request->data['field']; Retrieve specific key value $this->request->data('key_name'); Retrieve specific key value of nested array $this->requ...

By default CakePHP loads the related model in the controller. In order to load another model in the controller, use the loadModel() method: $this->loadModel('Articles'); or load on the fly $table = TableRegistry::get('Articles'); $table->find();

Dim fso As New Scripting.FileSystemObject Debug.Print fso.GetBaseName("MyFile.something.txt") Prints MyFile.something Note that the GetBaseName() method already handles multiple periods in a file name.

Dim fso As New Scripting.FileSystemObject Debug.Print fso.GetExtensionName("MyFile.something.txt") Prints txt Note that the GetExtensionName() method already handles multiple periods in a file name.

When inheriting from base Controller class provided by the framework, you can use the convenience method ViewComponent() to return a view component from the action: public IActionResult GetMyComponent() { return ViewComponent("Login", new { param1 = "foo", param2 = 42 }); ...

There are a several different ways of sorting a collection. Sort() The sort method sorts the collection: $collection = collect([5, 3, 1, 2, 4]); $sorted = $collection->sort(); echo $sorted->values()->all(); returns : [1, 2, 3, 4, 5] The sort method also allows for passing in ...

In Ansible, a playbook is is a YAML file containing the definition of how a server should look. In a playbook you define what actions Ansible should take to get the server in the state you want. Only what you define gets done. This is a basic Ansible playbook that installs git on every host belongi...

The format of a playbook is quite straightforward, but strict in terms of spacing and layout. A playbook consists of plays. A play is a combination of targets hosts and the tasks we want to apply on these hosts, so a drawing of a playbook is this: To execute this playbook, we simply run: ansible...

Sometimes it is required to display a notification at a specific time, a task that unfortunately is not trivial on the Android system, as there is no method setTime() or similiar for notifications. This example outlines the steps needed to schedule notifications using the AlarmManager: Add a Broa...

Retrieving sensor information from the onboard sensors: public class MainActivity extends Activity implements SensorEventListener { private SensorManager mSensorManager; private Sensor accelerometer; private Sensor gyroscope; float[] accelerometerData = new float[3]; f...

The sensor values returned by Android are with respective to the phone's coordinate system (e.g. +Y points towards the top of the phone). We can transform these sensor values into a world coordinate system (e.g. +Y points towards magnetic North, tangential to the ground) using the sensor managers ro...

Make sure the following dependency is added to your app's build.gradle file under dependencies: compile 'com.android.support:design:25.3.1' Show the hint from an EditText as a floating label when a value is entered. <android.support.design.widget.TextInputLayout android:layout_width=&qu...

TabLayout provides a horizontal layout to display tabs, and is commonly used in conjunction with a ViewPager. Make sure the following dependency is added to your app's build.gradle file under dependencies: compile 'com.android.support:design:25.3.1' Now you can add items to a TabLayout in your ...