Tutorial by Examples: t

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

// Get the battery API navigator.getBattery().then(function(battery) { battery.addEventListener('chargingchange', function(){ console.log( 'New charging state: ', battery.charging ); }); battery.addEventListener('levelchange', function(){ console.log( 'New battery...

The method PrintWriter.format (called through System.out.format) can be used to print aligned strings in console. The method receives a String with the format information and a series of objects to format: String rowsStrings[] = new String[] {"1", &q...

This inserts a json dictionary where one of the members is an array of strings into the table that was created in another example. INSERT INTO myjson(dict) VALUES('{"opening":"Sicilian","variations":["pelikan","dragon","najdorf"]}'); ...

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...

DELIMITER $$ DROP PROCEDURE IF EXISTS sp_nested_loop$$ CREATE PROCEDURE sp_nested_loop(IN i INT, IN j INT, OUT x INT, OUT y INT, INOUT z INT) BEGIN DECLARE a INTEGER DEFAULT 0; DECLARE b INTEGER DEFAULT 0; DECLARE c INTEGER DEFAULT 0; WHILE a < i DO WHILE b <...

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...

Controller code: angular.module('myModule', []) .controller('myController', function($scope) { $scope.num = 2; $scope.doSomething = function() { $scope.num += 2; } }); The test: describe('myController', function() { var $scope; beforeEach(function() { modu...

Service Code angular.module('myModule', []) .service('myService', function() { this.doSomething = function(someNumber) { return someNumber + 2; } }); The test describe('myService', function() { var myService; beforeEach(function() { module('myModule'); inj...

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...

A simple scatter plot import matplotlib.pyplot as plt # Data x = [43,76,34,63,56,82,87,55,64,87,95,23,14,65,67,25,23,85] y = [34,45,34,23,43,76,26,18,24,74,23,56,23,23,34,56,32,23] fig, ax = plt.subplots(1, figsize=(10, 6)) fig.suptitle('Example Of Scatterplot') # Create the Scatter P...

Shaded region below a line import matplotlib.pyplot as plt # Data x = [0,1,2,3,4,5,6,7,8,9] y1 = [10,20,40,55,58,55,50,40,20,10] # Shade the area between y1 and line y=0 plt.fill_between(x, y1, 0, facecolor="orange", # The fill color color='...

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...

A pointer to a const object can be converted to a pointer to non-const object using the const_cast keyword. Here we use const_cast to call a function that is not const-correct. It only accepts a non-const char* argument even though it never writes through the pointer: void bad_strlen(char*); const...

Vim's standard search commands are / for forward search and ? for backward search. To start a search from normal mode: press /, type your pattern, press <CR> to perform the search. Examples: /foobar<CR> search forward for foobar ?foo\/bar<CR> search backward for ...

In normal mode, move the cursor to any word then press * to search forwards for the next occurrence of the word under the cursor, or press # to search backwards. * or # search for the exact word under the cursor: searching for big would only find big and not bigger. Under the hood, Vim uses a sim...

The :global command already has its own topic: The global command

You can open a new split within Vim with the following commands, in normal mode: Horizontally: :split <file name> :new Vertically: :vsplit <file name> :vnew split will open the file in a new split at the top or left of your screen (or current split.) :sp and :vs are convenie...

ANTLR contains a testing tool in its runtime library, this tool can be used to display information detailing how the parsing is performed to match input against defined rules in your grammar file. To use this tool contained within the ANTLR jar file you should setup your systems classpath to allow ...