I have grown tired of looking up the named colors for my WPF apps. So I wrote a Helper class to make my life a little easier.
After playing around with this idea for a couple hours, I found a Dictionary<string,Color> is the easiest and most flexible way to reach my goal.
I’ve got an amusing problem at work. We need to create a way of passing runtime arguments around our app with safe and consistent results.
One solution is create a global class that sits in the core library. All of the properties would have to be static. At runtime, the bootstrapper updates the properties then we point everything to the global class when we need to know a value.
But it smells. A stinky lit’ hack.
First, what’s a factorial?
Paraphrasing Wikipedia: In mathematics, the factorial of a non-negative integer ‘n’, denoted by ‘n!’ is the product of all positive integers less than or equal to the integer. (link)
I found this in Jimmy Nilsson’s book, Applying Domain-Driven Design…
For me, I can see using this when rehydrating object sent over the wire or pulled from a database. If your class uses a self-created GUID to determine uniqueness, then you’d have to override that value when building an object up with predetermined values.
Anyway, here’s the code.
For my current project, I’m doing some statistical analysis. Part of that requires finding the mean and standard deviation for my collection of samples.
Because of the data source, I need to use the formula for “Population Standard Deviation” which is a little different from the formula for “Standard Deviation.” The denominator is “n” instead of “n – 1”. The word from my client is that in sample sizes over 20 the difference between the two formulas is negligible. Since we are running tests in a 96 well microplates, my sample count could be very low. Especially when you factor in the multiple sample sources, calibration samples and quality control samples on each microplate.
I’m finishing up a XamChart control. The data points are created on the fly as a behavior attached to a XamDataGrid. When the “active” record in the data grid changes, my behavior updates the chart to show the new record. The binding is two-way on the data points so that the user can drag a data point thereby updating the XamDataGrid’s values.
Still with me?
More complications.
Some of the data points can be edited, while others cannot.
By default, all of my markers are set to none. This makes it hard to figure out if a data point can be dragged aka edited and it makes it hard to actually grad the point because it is so small. To complicate matters, the existing style has animations.
Challenges:
(One of the last snippets from CodeKeep.)
I’ve got a console app that I am using to test NHibernate. The app fails to run because I can’t get connected to my local db. After checking the current user at runtime, I realized there wasn’t any defined user which messes up my db connection.
Here is a work-around.
(Another snippet I originally posted to CodeKeep.)
(Another snippet I originally posted to CodeKeep.)
After you finish modifying text within a RichTextBox control, you may want to move the cursor to the top of the control.
Code:
richTextBox1.SelectionStart = 0; richTextBox1.SelectionLength = 0;
(Another snippet I originally posted to CodeKeep.)
I needed to create a RichTextBox with a title, menu path, and description. Here’s how I made customized the visuals to suit the project. Title is enlarged and made bold. Menu is reduced and made italics. The description is ‘standard.’
Code:
(Another snippet I originally posted to CodeKeep.)
Code:
var myList = new List<string>() { "one", "two", "three" }; // print out the original list foreach (string item in myList) Console.WriteLine(item); // one two three myList.Remove("two"); // print out the new list foreach (string item in myList) Console.WriteLine(item); // one three
Notes:
You cannot remove items from a list inside of a foreach. You can set items to null, but you cannot remove the items.
(Another snippet I originally posted to CodeKeep.)
public enum EFileType
{
Unknown = –1,
Test,
Production
}
...
var fileType = EFileType.Production;
var str = Enum.GetName(typeof(EFileType),fileType); // str == 'Production'
(Another snippet I originally posted to CodeKeep.)
I needed to do a secure file copy to a remote server for an activity report. I chose to use pscp from PuTTY.
