在for的遍历循环中，else之后的结果alert如何让其只弹出一次？

Question

在一个for循环中当不满足之前的两个if条件时，则弹出alert提示框，由于做了遍历查询，所以alert会根据数组数量多次弹出，请教这个应该如何做截断，让其判断后只弹出一次？

目前这样写会根据json数据的条数，弹窗就会弹出三次。。。

Answer 1

function f(jsons, num) {&nbsp; &nbsp; var num8 = num.substr(0, 8);&nbsp; &nbsp; var num6 = num.substr(0, 6);&nbsp; &nbsp; var result = '';&nbsp; &nbsp; var inArr = 0;&nbsp; &nbsp; for (var i = 0, len = jsons.length; i < len; i++) {&nbsp; &nbsp; &nbsp; &nbsp; var id = jsons[i].id;&nbsp; &nbsp; &nbsp; &nbsp; if (id == num8) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; result8 = jsons[i].info.toString();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $("#card_info").fadeIn("500");&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $("#close").fadeIn("500");&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; inArr++;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; break;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; if (id == num6) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; result6 = jsons[i].info.toString();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $("#card_info").fadeIn("500");&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $("#close").fadeIn("500");&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; inArr++;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }&nbsp; &nbsp; !inArr && alert("不符合条件");&nbsp; &nbsp; return result8 ? result8 : result6;}