4.44.2 Greatest hits from previous weeks

4.44.2.1 Creating Mathematica packages
4.44.2.2 Difference between != and =!=
4.44.2.1 Creating Mathematica packages

https://mathematica.stackexchange.com/questions/29324/creating-mathematica-packages

 
I'm building a package to help me write packages and their documentation. In this post I explained how to make a package and its documentation. In the answer I provided I describe how to build a very  ...
 

- asked by jmlopez (91 votes), answered by Leonid Shifrin (122 votes)

4.44.2.2 Difference between != and =!=

https://mathematica.stackexchange.com/questions/153694/difference-between-and

 
I (think I) understand the difference between == (semantic) and === (syntactic). So when comparing != and =!= I was expecting a similar difference. So can anyone explain why the third line in this  ...
 

- asked by GambitSquared (6 votes), answered by John Joseph M. Carrasco (12 votes)