Spartan programming

The discipline of spartan programming means frugal use of variables:

• Minimize number of variables. Inline variables which are used only once. Take advantage of foreach loops.
• Minimize visibility of variables and other identifiers. Define variables at the smallest possible scope.
• Minimize accessibility of variables. Prefer the greater encapsulation of private variables.
• Minimize variability of variables. Strive to make variables final in Java and const in C++. Use annotations or restrictions whenever possible.
• Minimize lifetime of variables. Prefer ephemeral variables to longer lived ones. Avoid persistent variables such as files.
• Minimize names of variables. Short-lived, tightly scoped variables can use concise, terse names.
• Minimize use of array variables. Replace them with collections provided by your standard libraries.