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Mastering Development Software

With C#, in what way would it be problematic to have hundreds of classes derived from one abstract class?

With C#, I am defining the physical structure and behavior of a robot. For the physical structure: I wrote an abstract "Unit" class. Other classes such as "Factory" or "Arm" are derived from Unit. So there is a hierarchy/tree of Unit objects that defined the physical makeup of the robot. For example, the constructor of […]

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CMS Magento Mastering Development

Delete all products and categories Magento 2

I am using those requests to delete all products and categories and reset databases tables, it works fine and everything is cleared correctly but problem when I import products using csv products are not showing in the frontend, already reindexed, cleared cache … the view inventory_stock_1 existe but with nothing inside. Have I missed something […]

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Mastering Development

How to set action for other item not selected in a Recyclerview

I am using a recycler view adapter library to display my list with a recycler view. I have more one checkbox that I am displaying. What I want is to select on checkbox at a time. Once I select a check box any previously selected checkbox should be unselected. Adapter library https://github.com/utsmannn/Recycling Code val genderList […]

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Mastering Development

Why My service don t work in the Backgroung?

Im working on an taxi app that need to keep tracking driver even when the app is in background or the screen is off I tried to do it through a Service but it dons t work and I cant find the probleme My second issue it that the app don t upload some kind […]

Categories
Game Creation Mastering Development

setTransform() Box2D physics not working

It’s my first time posting here! I’m working on a top-down shooter game in LibGDX and Box2D (so gravity is set to (0, 0)). At the moment, to move my character, I’m using the setTransform() method. I understand it can be a bit buggy, but in past experiences the method worked fine and collisions were […]

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Mastering Development

Safe area screen size before and after device has rotated (Swift)

I want to apply different constraints (size, position, color, etc.) to a UIView (of a container view) when the user switches between portrait and landscape orientations. For some reason, the initial screen height is not the Safe Area height – after rotating the screen it seems to be ok. What am I doing wrong??? "h […]

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CMS Magento Mastering Development

Magento 2: How to work with larger collection of data that the site shouldn’t load too much?

I’m using this store locator extension in my 2.3.1 local. I have 1000 stores in the backend imported by using CSV. On the frontend, while I search that store address it should find the stores from that 1000 store which is working fine but it’s taking a very long time to show on google map. […]

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Linux Mastering Development Ubuntu

Configure monitors for session?

I have three monitors connected to my Ubuntu 18.04 box, and I’m struggling to get them to come up automatically configured how I want them. They all work by default, but I need to select which is primary, and configure resolutions, position, and scaling factor. In my case, I believe that the regular "settings->devices->displays" does […]

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Mastering Development

django.core.exceptions.FieldError: Cannot resolve keyword ‘department_name’ into field

How to use serializers.SlugRelatedField Correctly? My code is look like this but it got an error… There is the full error: django.core.exceptions.FieldError: Cannot resolve keyword ‘department_name’ into field. Choices are: badge, created_at, department, department_id, gender, id, name, position, position_id, updated_at Model Code: class Employee(models.Model): GENDER_CHOICES = ( (‘Male’, ‘Male’), (‘Female’, ‘Female’), ) name = models.CharField(max_length=100) […]

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Database Development

Best Practices for Separating Content from Presentation in SQL

A common and useful paradigm of programming is to separate content and presentation. One system deals with building the result, another system deals with outputting it. You see this with HTML vs CSS. HTML should ideally be clean and without any internal styling (color, position, etc), which should be handled by CSS. I’m now wondering […]