If you have a long list of emails, you can evaluate whether these emails are even real or not, using the ISEMAIL function. Suppose we have a list of emails in cell range A2:A5 in a given spreadsheet.

How to create a drop-down list in Google Sheets Your email has been sent Inconsistent data can create problems in Google Sheets. A misspelled word, an inaccurate ...

When working with applications in ASP.NET Core 6 you will often want to validate your models to ensure that the data they contain conform to the pre-defined validation rules. Enter model validation.

The decorator pattern is a good way to add extensibility to an application, as it follows SOLID design principles. Learn how to use it by adding validation logic to a form. The decorator pattern is a ...