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Objective-C //Displays the country pickerView with black background and white text [self. countryPicker setValue:[UIColor whiteColor] forKey:@"textColor"]; [self. countryPicker setValue:[UIColor blackColor] forKey:@"backgroundColor"]; Swift let color1 = UIColor(colorLitera...

This is a porting of set up sourced from DigitalOcean's tutorial of How To Serve Flask Applications with uWSGI and Nginx on Ubuntu 14.04 and some useful git resources for nginx servers. Flask Application This tutorial assume you use Ubuntu. locate var/www/ folder. Create your web app folder m...

You could describe variable affectation in different ways. Typed int a = 1 int a := 1 let int a = 1 int a <- 1 No type a = 1 a := 1 let a = 1 a <- 1

The BigInteger class has a constructor dedicated to generate random BigIntegers, given an instance of java.util.Random and an int that specifies how many bits will the BigInteger have. Its usage is quite simple - when you call the constructor BigInteger(int, Random) like this: BigInteger randomBigI...

Objective-C Add the delegate and a text-formatter to the ViewController.h file @interface ViewController : UIViewController <UIPrintInteractionControllerDelegate> { UISimpleTextPrintFormatter *_textFormatter; } In the ViewController.m file define the following constants #define Def...

An example of a constraint as expressed in the C standard is having two variables of the same name declared in a scope1), for example: void foo(int bar) { int var; double var; } This code breaches the constraint and must produce a diagnostic message at compile time. This is very usef...

Different countries have different number formats and considering this we can have different formats using Locale of java. Using locale can help in formatting Locale locale = new Locale("en", "IN"); NumberFormat numberFormat = NumberFormat.getInstance(locale); using above fo...

The members of a union share the same space in memory. This means that writing to one member overwrites the data in all other members and that reading from one member results in the same data as reading from all other members. However, because union members can have differing types and sizes, the da...

Catalan numbers algorithm is Dynamic Programming algorithm. In combinatorial mathematics, the Catalan numbers form a sequence of natural numbers that occur in various counting problems, often involving recursively-defined objects. The Catalan numbers on nonnegative integers n are a set of numbers t...

To see built-in data sets from package dplyr data(package = "dplyr") No need to load the package first.

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 ( ...

Let's get some theoretical knowledge before moving to the example. There are three important terms being used here Analyzers, Tokenizers, and Filters. To create such custom field you will need to create an analyzer with one tokenizer and one or more filters. As mentioned here, you can have only one ...

import { Component } from '@angular/core'; @Component({ selector: 'myapp-about', template: `<my-webcomponent></my-webcomponent>` }) export class AboutComponent { }

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...

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

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...

Go to the [https://developers.facebook.com/](https://developers.facebook.com/) and create your app. Click Add product and choose Facebook Login

Add button Login as facebook account to your login view: Edit site/login.php in views folder, add theses line to content of page login: <?= yii\authclient\widgets\AuthChoice::widget([ 'baseAuthUrl' => ['site/auth'], 'popupMode' => false, ]) ?> Above, we set that aut...

If you enable prettyUrl in your yii2-app, your redirect_uri will be: http://<base_url>/web/site/auth And disable pretty url: http://<base_url>/web/index.php?r=site%2Fauth Example: