In 1945 George Polya published the book How To Solve It which quickly became his most prized publication. It sold over one million copies and has been translated into 17 languages. In this book he identifies four basic principles of problem solving.
Merging two dicts in Python 3.5+ with a single expression
In these examples, Python merges dictionary keys in the order listed in the expression, overwriting duplicates from left to right.
Safe string comparison in Java
A very common situation occur when we try to compare a String variable and a string literal.