js中判断数组中是否存在某个对象

var arr=[{"appId":"3","appName":"慧管(西蓝花)"}, {"appId":"4","appName":"慧服务(西蓝花)"} ] var obj={"appId":"3","appName":"慧管(西蓝花)"} if(JSON.stringify(arr).indexOf(JSON.stringify(obj)) === -1){ console.log('不存在') arr.push(obj) }else{ console.log('已存在') } ```javascript if (my_bookshop_arr.find(item => item.bid === novel_info.bid)) { wx.showToast({ title: '书架中已有此书', icon: 'success', duration: 1000, mask: true }) return; }