//生成从minNum到maxNum的随机数 export function randomNum (minNum, maxNum) { switch (arguments.length) { case 1: return parseInt(Math.random() * minNum + 1, 10); case 2: return parseInt(Math.random() * (maxNum - minNum + 1) + minNum, 10); default: return 0; } } /* * 数组循环函数 * @param {Array} arr * @param {number} index */ export function nextArray(arr, index) { index--; return arr.slice(index + 1, arr.length).concat(arr.slice(0, index + 1)); }