Percentage chance of saying something?

Question

How do I make it so ..

• 80% of the time it will say sendMessage(\"hi\");
• 5 % of the time it will say sendMessage(\"bye\");
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Answer 1

Here is a very simple approximate solution to the problem. Sort an array of true/false values randomly and then pick the first item.

This should give a 1 in 3 chance of being true..

var a = [true, false, false]
a.sort(function(){ return Math.random() >= 0.5 ? 1 : -1 })[0]