/**
* @desc 判断两个数组是否相等
* @param {Array} arr1
* @param {Array} arr2
* @return {Boolean}
*/
export function arrayEqual(arr1, arr2) {
if (arr1 === arr2) return true;
if (arr1.length != arr2.length) return false;
for (var i = 0; i < arr1.length; ++i) {
if (arr1[i] !== arr2[i]) return false;
}
return true;
}