TODO: comparison, == vs equals, etc.

• pass_by.cpp examples using primitive integer

• pass_by_2.cpp examples using a mutable class

• pass_by.py pass an integer in Python

• pass_by_2.py pass a mutable class in Python

• pass_by_3.py pass a mutable class in Python and mutate it instead of assigning a new object

• Comparison.cpp

• PassByReference.java

• immutable.py*

• pass.c

• pass.pl

• values_and_variables.c

• values_and_variables.py

• values_and_variables_long.c