/**
* This function will return the index of the random selected item of a array based in the passed probably
*
* @example choiceTrend([0.25, 0.5, 0.25]); // 1
* @example choiceTrend([0.5, 0.5]); // 0
* @example choiceTrend([0.1, 0.9]); // 1
* @example choiceTrend([0.1,0.1,0.1,0.1,0.1,0.1,0.1,0.1,0.1,0.1]); // 7
*
* @param {number[]} options
* @returns {number} returns the index of the selected
*/
export function choiceTrend(options = [0.25, 0.5, 0.25]) {
let sum = 0
const random = Math.random();
for (let i = 0; i < options.length; i++) {
sum += options[i];
if (random <= sum) {
return i;
}
}
}