The following code example shows how you can use a guard clause in C# to prevent invalid input. Note how an exception is thrown if the input string is null or empty.

String theory is widely considered beyond empirical investigation. But we could conceivably test it thanks to ancient particles called moduli, which might appear in astronomical observations, says ...

Learn how to use different methods to check if a string is empty or null in shell script, and see some examples of how to use them in your scripts.

A simple test for null or empty is not working. I've verified the behaviour with LiquidJS and an identical liquid file and it works fine. {% assign ItemExists = content.existing != null and content ...

Meta hands its open-source Jest JavaScript testing framework to the OpenJS Foundation to let the project flourish as a community-led initiative.

It’s normal for JavaScript-based webpages to appear empty in Google’s cached view, says Google’s Search Advocate John Mueller.

I test this value server side to see if it has changed since before, and empty string is different from null so I have to test the difference from null AND empty string literally everywhere.

Does this conjecture really amount to a test of string theory? No,it is too early to say that, according to Vafa. The principles are still just conjectures—for now.