Tutorial by Examples: er

~ Integer

The following example illustrates use of the bitwise NOT (~) operator on integer numbers. let number = 3; let complement = ~number; Result of the complement number equals to -4; ExpressionBinary valueDecimal value300000000 00000000 00000000 000000113~311111111 11111111 11111111 11111100-4 To ...

JavaScript • Tilde ~

~~ Operator

Double Tilde ~~ will perform bitwise NOT operation twice. The following example illustrates use of the bitwise NOT (~~) operator on decimal numbers. To keep the example simple, decimal number 3.5 will be used, cause of it's simple representation in binary format. let number = 3.5; let complement...

JavaScript • Tilde ~

Converting Non-numeric values to Numbers

~~ Could be used on non-numeric values. A numeric expression will be first converted to a number and then performed bitwise NOT operation on it. If expression cannot be converted to numeric value, it will convert to 0. true and false bool values are exceptions, where true is presented as numeric v...

JavaScript • Tilde ~

Switching the geometry and the surface representation using subroutines in OGL 4.0 GLSL

A simple OGL 4.0 GLSL shader program that shows the use shader subroutines. The program is executed with a phyton script. To run the script, PyOpenGL and NumPy must be installed. The subroutines switch between different geometry generated in the geometry shader and change the surface representatio...

glsl • Getting started with glsl

Changing the geometry with tessellation shaders in OGL 4.0 GLSL

A simple OGL 4.0 GLSL shader program that shows that shows how to add details with tessellation shader to the geometry. The program is executed with a python script. To run the script, PyOpenGL and NumPy must be installed. The basic mesh in this example is an icosahedron that consists of 20 triang...

glsl • Getting started with glsl

Creating a custom Entry control with a MaxLength property

The Xamarin Forms Entry control does not have a MaxLength property. To achieve this you can extend Entry as below, by adding a Bindable MaxLength property. Then you just need to subscribe to the TextChanged event on Entry and validate the length of the Text when this is called: class CustomEntry ...

Xamarin.Forms • Creating custom controls

Spread dot operator(*.)

Spread dot operator can be used instead of collect method (1..10)*.multiply(2) // equivalent to (1..10).collect{ it *2 } d = ["hello", "world"] d*.size() // d.collect{ it.size() }

groovy • Groovy code golfing

Use react-navigation for navigation in react native apps

With the help of react-navigation, you can add navigation to your app really easy. Install react-navigation npm install --save react-navigation Example: import { Button, View, Text, AppRegistry } from 'react-native'; import { StackNavigator } from 'react-navigation'; const App = StackNavigat...

react-native • Navigator Best Practices

Ignore case analyzer

Sometimes, we may need to ignore the case of our query, with respect to the match in the document. An analyzer can be used in this case to ignore the case while searching. Each field will have to contain this analyzer in it's property, in order to work: "settings": { "analys...

Elasticsearch • Analyzers

User defined REReplaceCallback function

function REReplaceCallback(re,str,callback) { /* Thanks to Ben Nadel "Learning ColdFusion 8: REMatch() For Regular Expression Matching" from 2007-06-13 https://www.bennadel.com/blog/769-learning-coldfusion-8-rematch-for-regular-expression-matching.h...

coldfusion • Working with RegExp Replace callbacks

Using REReplaceCallback function

REReplaceCallback('YOUR REGEX GOES HERE','AND YOUR STRING HERE',function(groups) { //now you can access the 'groups' array containing all the captured groups return result; //return whatever you've processed inside });

coldfusion • Working with RegExp Replace callbacks

Setup Token on Header

Set the token on <head> of your default.blade.php. <meta name="csrf-token" content="{{csrf_token()}}"> Add ajaxSetup on the top of your script, that will be accessible to everywhere. This will set headers on each ajax call $.ajaxSetup({ headers: { '...

Laravel • Token Mismatch Error in AJAX

Check session storage path & permission

Here I assume that project app url is APP_URL=http://project.dev/ts/toys-store Set the writable permission to storage_path('framework/sessions') the folder. Check the path of your laravel project 'path' => '/ts/toys-store', the root of your laravel project. Change the name of your cookie 'co...

Laravel • Token Mismatch Error in AJAX

General information

First some general information about how arrays behave in Coldfusion as compared to other programming languages. Arrays can have numeric indexes only (if you want to have a string index use structs instead) Arrays begin at index [1] Arrays can have one ore more dimensions

coldfusion • ColdFusion Arrays

Server supports ranges

Request:"http://example.com" GET / HTTP/1.1 Host: example.com User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate ...

http-headers • Accept-Ranges: (Response)

Server doesn't support ranges

Request:"http://example.com" GET / HTTP/1.1 Host: example.com User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate ...

http-headers • Accept-Ranges: (Response)

dispatcher-servlet.xml

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context=&quot...

spring-mvc • Spring-MVC with annotations

@Controller & @RequestMapping

@Controller @RequestMapping("/appointments") public class AppointmentsController { //your handlers here, for example: @RequestMapping(path = "/new", method = RequestMethod.GET) public AppointmentForm getNewForm() { return new AppointmentForm(); } @RequestMapping...

spring-mvc • Spring-MVC with annotations

Display username

You can show username for autenticated users <div sec:authorize="isAuthenticated()"> Welcome, <span sec:authentication="name">Username</span> </div>

thymeleaf • Spring Security and Thymeleaf

Display different content to different roles

The sec:authorize attribute renders its content when the attribute expression is evaluated to true <div sec:authorize="hasRole('ROLE_ADMIN')"> Content for administrators </div> <div sec:authorize="hasRole('ROLE_USER')"> Content for users </div&g...

thymeleaf • Spring Security and Thymeleaf