Function nextBoolean

Generates a random boolean.

The ratio param is used to determine the chance of the boolean being true or false.

For instance:

• If ratio is .5, the chance of being true or false is 50%.
• If ratio is .1, the chance of being true is 10%, and of being false is 90%.
• If ratio is .9, the chance of being true is 90%, and of being false is 10%.
• If ratio is 1 or greater, the chance of being true is 100%.
• If ratio is 0 or lower, the chance of being true is 0%.

Returns

A random boolean.