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QRCodeReaderView implements an Android view which show camera and notify when there's a QR code inside the preview. It uses the zxing open-source, multi-format 1D/2D barcode image processing library. Adding the library to your project Add QRCodeReaderView dependency to your build.gradle dependen...

In slices the zero value is an empty slice. var myIntSlice []int // [] - an empty slice Use make to create a slice populated with values, any values created in the slice are set to the zero value of the type of the slice. For instance: myIntSlice := make([]int, 5) // [0, 0, 0, 0, 0] - a s...

Checkbox is a control that allow user to get boolean values from user for a spesific question like "Are you ok?". Has a event called CheckedChanged, which occurs whenever the check property is changed. Here is a CheckBox that has a question "Is Checked?". We got this Message...

Same as, with writing classes - start with the simple cases, then add requirement (aka tests) and implementation (aka production code) case by case: [Test] public void EnsureThat_IsLeapYearIfDecimalMultipleOf4() {...} [Test] public void EnsureThat_IsNOTLeapYearIfDecimalMultipleOf100 {...} [Tes...

Sometimes you want to know the position (index) of the current element while iterating over an enumerator. For such purpose, Ruby provides the with_index method. It can be applied to all the enumerators. Basically, by adding with_index to an enumeration, you can enumerate that enumeration. Index is ...

First we initialize our initial value problem we want to solve. odefun = @(t,y) cos(y).^2*sin(t); tspan = [0 16*pi]; y0=1; We then use the ode45 function without any specified options to solve this problem. To compare it later we plot the trajectory. [t,y] = ode45(odefun, tspan, y0); plot(t,...

If we want some code to be executed periodically after the execution which was before is finished, we should use fixed delay (measured in milliseconds): @Component public class MyScheduler{ @Scheduled(fixedDelay=5000) public void doSomething() { // this will execute pe...

If we want something to be executed periodically, this code will be triggered once per the value in milliseconds we specify: @Component public class MyScheduler{ @Scheduled(fixedRate=5000) public void doSomething() { // this will execute periodically } }

A Cron expression consists of six sequential fields - second, minute, hour, day of month, month, day(s) of week and is declared as follows @Scheduled(cron = "* * * * * *") We can also set the timezone as - @Scheduled(cron="* * * * * *", zone="Europe/Istanbul") ...

Class for which you will create unit test case. class Authorization { /* Observer so that mock object can work. */ public function attach(Curl $observer) { $this->observers = $observer; } /* Method for which we will create test */ public function postAuthorization($url, $met...

A method called in one object will move up the chain of objects until one is found that can properly handle the call. This particular example uses scientific experiments with functions that can just get the title of the experiment, the experiments id or the tissue used in the experiment. abstract c...

This is the code to filter the Datatables [1.10.7] by value programmatically, you can find it on official documentation. function setFilterValue(datatable, value){ if(datatable !== undefined){ datatable .columns(0) .search(value) .draw(); } ...

Boxplots are descriptive diagrams that help to compare the distribution of different series of data. They are descriptive because they show measures (e.g. the median) which do not assume an underlying probability distribution. The most basic example of a boxplot in matplotlib can be achieved by jus...

Binding a Swift Library in Xamarin.iOS follows the same process for Objective-C as shown in https://developer.xamarin.com/guides/ios/advanced_topics/binding_objective-c/, but with some caveats. A swift class must inherit from NSObject to be binded. Swift compiler will translate class and protoco...

One of the biggest appeals of Nginx is the difference in how it works internally as compared to the other popular servers, specially Apache. Servers are busy programs as they have to serve requests from multiple clients. The more requests a server can successfully serve per second, the better. Ngi...

The basics In the heading of ContentPage, insert following line: xmlns:cv="clr-namespace:Xamarin.Forms;assembly=Xamarin.Forms.CarouselView" Between the <ContentPage.Content> tags place the CarouselView: <cv:CarouselView x:Name="DemoCarouselView"> </cv:Carous...

Place a file like the following in your top level directory. It defines which components to render for which paths import React from 'react'; import { Route, IndexRoute } from 'react-router'; import New from './containers/new-post'; import Show from './containers/show'; import Index from './c...

Let's take a look at a quick example of using REST framework to build a simple model-backed API. We'll create a read-write API for accessing information on the users of our project. Any global settings for a REST framework API are kept in a single configuration dictionary named REST_FRAMEWORK. Sta...

Salesforce Navigator (Google Chrome) Force.com Logins (Google Chrome, Firefox) Salesforce Developer Tool Suite (Google Chrome) Salesforce Lighting Components Inspector (Google Chrome) Salesforce Developer Tool Suite (Google Chrome) Salesforce Schema Builder Expander (Google Chrome) Boostr fo...

Put the following code in functions.php: function themify_custom_excerpt_length( $length ) { return 50; } add_filter( 'excerpt_length', 'themify_custom_excerpt_length', 999 ); Use 999 as the priority to ensure that the function runs after the default WordPress filter, otherwise it would ov...