In Part 1 of this series, I showed you an example of PowerShell's native validation capabilities. In that installment, I wrote a function that accepted a text string as input. The function then used ...

Most web frameworks I've seen handle form validation using exceptions; if the form fields or the whole form don't meet the requirements, an exception is thrown and dealt with (redirect back to the ...

The bad news is that input validation is difficult. White listing, or identifying all possible strings accepted as input, is nearly impossible for all but the simplest of applications. Black listing, ...

Excel's data validation feature is more versatile than you might think. Learn how to use literal values, input values, list values, and even formulas to restrict input date values using data ...

Some of the most common questions I get are “What do you think of our messaging?” or “What do you think of our new website?” As you might imagine, most of the time what the person wants to hear is ...

Take advantage of guard clauses in C# to eliminate unnecessary nested constructs and branches and enhance the readability and maintainability of your application’s code. We always strive to write ...