Tutorial by Examples: g

Suppose, that we have three users : The Administrator of the database > admin The application with a full access for her data > read_write The read only access > read_only With below queries, you can set access privileges on objects created in the future in specified schema. ALTER ...

If you're Using VueJS2 and like to use JSX along with it. In this case,to use the slot, the solution with example is below.We have to use this.$slots.default It's almost like this.props.children in React JS. Component.js : export default { render(h) { //eslint-disable-line return ( ...

You need to change price scope 'Global' to 'website' (Sysytem->Configuration->Catalog->Catalog->Price) $client = new SoapClient('http://your-web-site/api/soap/?wsdl'); $API_USER = 'your-api-user'; $API_KEY = 'your-api-key'; $session = $client->login($API_USER, $API_KEY); $result...

var x = 5; var str = "if (x == 5) {console.log('z is 42'); z = 42;} else z = 0; "; console.log("z is ", eval(str)); The use of eval is strongly discouraged. See the Remarks section for details.

Installation $ npm install gulp-jslint --save-dev Usage In gulpfile.js add: var gulp = require('gulp'); var jslint = require('gulp-jslint'); gulp.task('lint', function(){ return gulp.src(['source.js']) .pipe(jslint({ /* this object represents the JSLint directives being passe...

Objective-C Create a new iOS project and add CoreSpotlight and MobileCoreServices framework to your project. Create the actual CSSearchableItem and associating the uniqueIdentifier, domainIdentifier and the attributeSet. Finally index the CSSearchableItem using [[CSSearchableIndex defaul...

Aggregation is used to perform complex data search operations in the mongo query which can't be done in normal "find" query. Create some dummy data: db.employees.insert({"name":"Adma","dept":"Admin","languages":["german","f...

This is an example code to create and execute the aggregate query in MongoDB using Spring Data. try { MongoClient mongo = new MongoClient(); DB db = mongo.getDB("so"); DBCollection coll = db.getCollection("employees"); //Equivalent to $m...

When defining a new trait it is possible to enforce that types wishing to implement this trait verify a number of constraints or bounds. Taking an example from the standard library, the DerefMut trait requires that a type first implement its sibling Deref trait: pub trait DerefMut: Deref { fn...

An easy way to get an input from a user is by using the prompt() method. Syntax prompt(text, [default]); text: The text displayed in the prompt box. default: A default value for the input field (optional). Examples var age = prompt("How old are you?"); console.log(age); // Pri...

import pygame file = 'some.mp3' pygame.init() pygame.mixer.init() pygame.mixer.music.load(file) pygame.mixer.music.play(-1) # If the loops is -1 then the music will repeat indefinitely.

import pygame import time pygame.mixer.init() pygame.display.init() screen = pygame.display.set_mode ( ( 420 , 240 ) ) playlist = list() playlist.append ( "music3.mp3" ) playlist.append ( "music2.mp3" ) playlist.append ( "music1.mp3" ) pygame.mixer.musi...

By default, PHP Curl supports GET and POST requests. It is possible to also send custom requests, such as DELETE, PUT or PATCH (or even non-standard methods) using the CURLOPT_CUSTOMREQUEST parameter. $method = 'DELETE'; // Create a DELETE request $ch = curl_init($url); curl_setopt($ch, CURLOPT...

To install PHP on Ubuntu, first install the Redis server: sudo apt install redis-server then install the PHP module: sudo apt install php-redis And restart the Apache server: sudo service apache2 restart

Assuming a default server running on localhost with the default port, the command to connect to that Redis server would be: $redis = new Redis(); $redis->connect('127.0.0.1', 6379);

The Redis PHP module gives access to the same commands as the Redis CLI client so it is quite straightforward to use. The syntax is as follow: // Creates two new keys: $redis->set('mykey-1', 123); $redis->set('mykey-2', 'abcd'); // Gets one key (prints '123') var_dump($redis->get('m...

Preparing data: create table wf_example(i int, t text,ts timestamptz,b boolean); insert into wf_example select 1,'a','1970.01.01',true; insert into wf_example select 1,'a','1970.01.01',false; insert into wf_example select 1,'b','1970.01.01',false; insert into wf_example select 2,'b','1970.01.01...

The partition of an integer is a way of writing it as a sum of positive integers. For example, the partitions of the number 5 are: 5 4 + 1 3 + 2 2 + 2 + 1 2 + 1 + 1 + 1 1 + 1 + 1 + 1 + 1 Notice that changing the order of the summands will not create a different partition. The partition f...

public class IntegerPartition { public static int[,] Result = new int[100,100]; private static int Partition(int targetNumber, int largestNumber) { for (int i = 1; i <= targetNumber; i++) { for (int j = 1; j <= largestNumber; j++) ...

This is an example of using until/retries/delay to implement an alive check for a webapp that is starting up. It assumes that there will be some period of time (up to 3 minutes) where the webapp is refusing socket connections. After that, it checks the /alive page for the word "OK". It als...