diceware/tests/lib.js

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/**
* Return an array with max values, where each value is the number of times
* the remainer was that of the index. This is used to show bias in a
* particular dividend.
*
* Based on code at https://github.com/dmuth/diceware/issues/7
*/
function demonstrateBias(max) {
var map = new Array(max);
for (var i = 0; i < max; i++) {
map[i] = 0;
}
//
// Go through all possible values (note that any power of 2
// should work, instead of 256...) and increment map by one for each
// remainder we get across that set.
//
for (var i = 0; i < 256; i++) {
map[i % max]++;
}
//
// All of the values in this should be equal. If not, there's bias!
//
return map;
} // End of demonstrateBias()
//console.log(demonstrateBias(4));
//console.log(demonstrateBias(5));
//console.log(demonstrateBias(6));
//console.log(demonstrateBias(8));