我的api响应如下所示:
id: (...)
user_id: (...)
symptoms: "Sore throat, Headache"
id: (...)
user_id: (...)
symptoms: "Anorexia (Loss of appetite), Shortness of breath (Difficult in breathing), Myalgias (Muscle pains), Sore throat, Headache"
我正在尝试匹配一个用户的症状到现有的症状类别。 一个用户最多可以有14个症状。 当我拆分和切片数组以获取单个症状并匹配它们时，我一直得到一个无法读取未定义的属性'slice'的错误。
如果用户的症状少于14个，则尝试为对象设置默认值时，错误仍然存在。
我的代码:
getSymNum (symp, c) {
var counter = 0
for (var xc in c) {
var symp1 = c[xc].symptoms.split(',')[0]
var symp2 = c[xc].symptoms.split(',')[1].slice(1)
var symp3 = c[xc].symptoms.split(',')[2].slice(2)
var symp4 = c[xc].symptoms.split(',')[3].slice(3)
var symp5 = c[xc].symptoms.split(',')[4].slice(4)
var symp6 = c[xc].symptoms.split(',')[5].slice(5)
if (symp3 !== undefined){
console.log("hello ha")
}
if (symp1 === symp) {
counter++
} else if (symp2 === symp) {
counter++
} else if (symp3 === symp) {
counter++
} else if (symp4 === symp) {
counter++
} else if (symp5 === symp) {
counter++
} else if (symp6 === symp) {
counter++
}
}
return counter
},
您可以使用数组/字符串方法优化检查，如contains()或indexof():
etSymNum (symp, c) {
var counter = 0
for (var xc in c) {
if(c[xc].symptoms.indexOf(symp) !== -1){
counter++;
}
}
return counter
},
