Mastering JavaScript

Chapter 1
debug("INFO","Info Message");
debug("DEBUG","Debug Message");
debug("ERROR","Fatal Exception");
In this example, we are intentionally letting the execution fall through to write a
concise switch-case. If levels are either INFO, WARN, or DEBUG, we use the switchcase
to fall through to a single point of execution. We omit the break statement for
this. If you want to follow this pattern of writing switch statements, make sure that
you document your usage for better readability.
Switch statements can have a default case to handle any value that cannot be
evaluated by any other case.
JavaScript has a while and do-while loop. The while loop lets you iterate a set of
expressions till a condition is met. The following first example iterates the statements
enclosed within {} till the i