method of static class JsNgram
Description
Custom log function with verbose level.
Example
JsNgram.log.v1('level 1 debugging message: ', x);
Usage
log.v0(obj1[, obj2, ... ]);
log.v1(obj1[, obj2, ... ]);
log.v2(obj1[, obj2, ... ]);
log.v3(obj1[, obj2, ... ]);
When verbose = 1, log.v0 and log.v1 act as console.log.
On the other hand log.v2 and log.v3 do nothing.
The log.v0 is always as same as console.log.
Inner Class Log
The log method is an instance of inner class Log.
It has methods v0, v1, v2 and v3.
The class is initialized with verbose level.
And the instance will have fixed rolls on these four methods.
When property verbose changed
A new instance of the inner class Log is generated with the new verbose level.
This new instance is set as the method log.