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Game Creation Mastering Development

Class Not Found Exception on Class.forName()

I am having this exception on title. I have been following a LibGDX programming PDF, everything was working perfectly and then this code have been implemented, and it isnt working anymore. I should add that Rock and Starfish are classes on my project, and there is no typo on class names Caught message: java.lang.ClassNotFoundException: Rock […]

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Mastering Development

How can I convert a const char* to a string in CLR/C++ with FLTK to obtain the value of an FL_Input or other widget?

I have been recently constructing a program. The end goal is to get what the user has written in the Fl_Input box and write it into my database. To do this I am going to need a callback on a button that allows me to at least get the string value of an Fl_Input->value() The […]

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Mastering Development

Create a delay to close JFrame after a JButton is clicked

I’m currently working on a Database program, but have run into an issue. I am trying to create a JFrame that prompts a user for what to do, then when they click a button, a method in another class is called (db.createDB() or db.openDB()). I’m not sure exactly how to add a timer to dispose […]

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Mastering Development

using d3 to visualize data in a webmapping application built with Openlayers

I am trying to build a web mapping application using openlayers 3 for map interaction and d3 to visualize data on the map , i tried this example: https://openlayers.org/en/latest/examples/d3.html but it seems it didn’t work; there is a problem of precesion as you can see in this picture :result here is my code: var canvasNbr […]

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Mastering Development

Have some problem when i try to add in a map of Class and vector of class in c++

I have a class Servicii with protected double price and a method getPrice() that return the price and 3 derived classes House,Car,Books I thought that a person can rent move things, like person1 can rent a book,a house and a car at the same time ,so i though to make a map like this : […]

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Database Development

Index Order Help SQLite

I have a very large sqlite table (70 million rows) on a low end machine that I am trying to properly index. My columns are timestamp, machineid, ioid and value. There are probably about 200 ioids (on each machine), a handful of machineids and timestamp is one sample per second for each ioid. My queries […]

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CMS Mastering Development Wordpress

Using an existing image size for another image size

I have the following custom image size: add_action( ‘after_setup_theme’, ‘add_custom_image_sizes’ ); function add_custom_image_sizes() { // Thumbnail add_image_size( ‘thumbnail’, 150, 150 ); } Is it possible to use an existing image size for another image size? Here’s an example: add_action( ‘after_setup_theme’, ‘add_custom_image_sizes’ ); function add_custom_image_sizes() { // Thumbnail add_image_size( ‘thumbnail’, 150, 150 ); // WooCommerce thumbnail […]

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Mastering Development

Creating a text file using keys from dictionary with multiple values

I’ve been working on compiling information for this dictionary: {‘Uranus’: [‘2750’, ‘3000’, ‘2880’], ‘Mercury’: [’46’, ’70’, ’57’], ‘Earth’: [‘147’, ‘152’, ‘150’], ‘Venus’: [‘107’, ‘109’, ‘108’], ‘Mars’: [‘205’, ‘249’, ‘228’], ‘Saturn’: [‘1350’, ‘1510’, ‘1430’], ‘Jupiter’: [‘741’, ‘817’, ‘779’], ‘Neptune’: [‘4450’, ‘4550’, ‘4500’], ‘Pluto’: [‘4440’, ‘7380’, ‘5910’]} I now am trying to write to a text file […]

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Mastering Development

Q: How Do I make A Coin System? In Pygame

I have made a simple game but I want to learn how to make a coin system for example This is my code right any help I would appreciate Thanks! my game so fare I want to learn how to make a simple coin system where coins spawn on my platforms and if I touch […]

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Mastering Development

Stop the `extent` argument in Turtle from changing direction of circle

I am working on a homework assignment where the instructions are: Using Turtle graphics, implement function planets(), which will simulate the planetary motion of Mercury, Venus, Earth, and Mars during one rotation of planet Mars. You can assume that: At the beginning of the simulation, all planets are lined up (say along the negative y-axis). […]