Learn the difference between ID and Class in CSS notation.

See an example of how to validate an e-mail address using Angular's ngPattern.

Java provides an easy approach to knowing the current stack.

The formatting for the data written to the console using the console.write or console.writeline commands can be difficult to read. See how C# allows you to insert additional spaces to fix that problem.

Check out a quick way to access information from the previous row or next row from the current row.

See why it is a good idea to store the log instance in a static final variable.

Learn how to check if a number is prime using the isProbablePrime method in Java.

Learn why it's helpful to fully qualify database objects so that there is no place for ambiguity.

Figure out whether or not your timezone supports Daylight Saving Time programmatically.

This query  checks for null values, as well as empty strings, then provides a suitable replacement on either occasion.