Monthly Archives: November 2018

Book review: Python for Kids: A Playful Introduction To Programming

Posted on November 27, 2018 by RodStephens

Over the years, I’ve read many thousands of books, some good and some not so good. Jason Briggs’ book Python for Kids: A Playful Introduction To Programming falls into the very exclusive category of books that I wish I had … Continue reading →

Posted in books | Tagged book reviews, books, programming, Python for Kids | Leave a comment

Use a standard Windows dialog to let the user select folders in C#

Posted on November 26, 2018 by Rod Stephens

The .NET OpenFileDialog and SaveFileDialog are fairly full-featured. They’re a lot like Windows Explorer with some added file selection capabilities thrown in. In contrast, the FolderBrowserDialog is pretty pathetic. It only lets you use a hierarchical tree-like display, doesn’t provide … Continue reading →

Posted in API, controls, files | Tagged API, browse for directory, browse for folder, C#, C# programming, common dialog, CommonOpenFileDialog, controls, dialog, example, example program, files, FolderBrowserDialog, select directory, select folder, Windows dialogs, Windows Forms programming | 13 Comments

Gary Beene’s gbUnSnarl game

Posted on November 23, 2018 by RodStephens

Check out Gary Bene’s gbUnSnarl game. Your job is to drag the nodes in a network to unsnarl it. Basically it asks you to find a way to rearrange a planar network so none of its edges intersect. Algorithms to … Continue reading →

Posted in algorithms, games | Tagged algorithms, C#, C# programming, example, example program, games, network algorithms, snarl, Windows Forms programming | Leave a comment

Find happy numbers in C#

Posted on November 14, 2018 by RodStephens

Before I show you the code, let me explain what happy numbers are. Happy Numbers To find happy numbers, start with any integer. Replace it with the sum of the squares off its digits. Repeat the process until the numbers … Continue reading →

Posted in algorithms, mathematics | Tagged algorithms, C#, C# programming, example, example program, happy numbers, mathematics, Windows Forms programming | Leave a comment

Draw words on a circle in WPF and C#

Posted on November 8, 2018 by RodStephens

This example shows one way that you can draw words on a circle in WPF. Note that it does not show how to draw words where each character is rotated to follow the circle’s curve. Each word is rotated as … Continue reading →

Posted in algorithms, graphics, mathematics | Tagged algorithms, C#, C# programming, circle text, draw words, example, example program, graphics, mathematics, Windows Forms programming | Leave a comment

Draw a hyperbolic spiral in C#

Posted on November 6, 2018 by RodStephens

A hyperbolic spiral, which is also called an reciprocal spiral, is the inverse of an Archimedes spiral. It uses the equation r = A / θ to generate points on a spiral. This spiral has a couple of interesting properties. … Continue reading →

Posted in algorithms, graphics, mathematics | Tagged algorithms, Archimedes spiral, C#, C# programming, example, example program, graphics, mathematics, spiral, Windows Forms programming | Leave a comment

Review posted: “The Modern C# Challenge”

Posted on November 2, 2018 by RodStephens

The Modern C# Challenge: Become an expert C# programmer by solving interesting programming problems Clock End Gooner has posted a review of my latest book, The Modern C# Challenge: Become an expert C# programmer by solving interesting programming problems. Please … Continue reading →

Posted in books, combinatorics, cryptography, geometry, mathematics | Leave a comment

Draw a logarithmic spiral in C#

Posted on November 1, 2018 by RodStephens

The post Draw an Archimedes spiral in C# uses the equation r = A˙θ to generate the points on a spiral. This example is almost exactly the same except it uses the equation to r = A˙eB˙θ to generate its … Continue reading →