基于JavaScript实现微信抢红包功能

金额随机：额度在0.01和(剩余平均值*2)之间。

/**
 * 抢红包
 * @param {[number]} totalAmount [总金额]
 * @param {[number]} totalPeople [总人数]
 * @return {[Array]} [每个人抢到的金额]
 */
function assign(totalAmount, totalPeople){
 var remainAmount = +totalAmount;
 var remainPeople = +totalPeople;
 var arr = [];
 while(remainPeople > 0){
 let num = scramble(remainAmount, remainPeople);
 remainAmount = remainAmount - num;
 remainPeople--;
 arr.push(num);
 }
 return arr;
}
function scramble(remainAmount, remainPeople){
 if(remainPeople === 1){
 return +remainAmount.toFixed(2);
 }
 let max = ((remainAmount / remainPeople) * 2 - 0.01).toFixed(2);
 let min = 0.01;
 let range = max - min;
 let rand = Math.random();
 let num = min + Math.round(rand * range); //四舍五入
 return num;
}

总结

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