我的函数存在一个问题，我似乎无法解决。目前，它说无法读取连接槽中未定义的属性"拆分"

Question

我使用的函数是

function joinslots(freeTimings){
joined=[];
if(freeTimings.length==1){
joined.push(freeTimings);
}
if(freeTimings.length>1){
for(i=0;i<=freeTimings.length;){
//console.log(freeTimings[i]);
time0=freeTimings[i].split("-");
first0=time0[0];
last0=time0[1];
time1=freeTimings[i+1].split("-");
first1=time1[0];
last1=time1[1];
if(last0==first1){
newfirst=first0;
newlast=last1;
newtime = newfirst+"-"+newlast;
joined.push(newtime);
if(i+2<freeTimings.length){
time2=freeTimings[i+2]
first2=time2[0];
last2=time2[1];
if(first2==last1){
i=i+2;
}
else i++;
}
else i+=2;
}
else{
joined.push(freeTimings[i]);
i++;
}  
if(i==freeTimings.length-1){
joined.push(freeTimings[i-1]);
break;
}      
}
}
return joined;    

}

该功能的输入是30分钟的时段，并且应尽可能返回一小时的连接时段。每次我修复一个错误时，它都会抛出另一个错误，这让我认为这里有一个我无法解决的潜在问题，除了我保留了if语句的数组可能越界之外。

例如，输入是

freeTimings=["8:00-8:30","8:30-9:00","9:00-9:30","12:00-12:30","12:30-13:00","13:00-13:30","13:30-14:00","14-14:30","15:30-16:00","16:00-16:30","17:30-18:00"]

返回的值必须是

joined=["8:00-9:00","9:00-9:30","12:00-13:00","13:00-14:00","14:00-14:30","15:30-16:30","17:30-18:00"]

因此，如果能帮助修复我的功能，我们将不胜感激：(

Answer 1

编写方法slotMerge，检查两个时间字符串是否可以合并。如果可以合并，则返回合并的slot，否则返回空字符串。

使用此方法，遍历数组并将合并或未合并的插槽推入输出数组。

这有多大帮助。

const freeTimings = [
"8:00-8:30",
"8:30-9:00",
"9:00-9:30",
"12:00-12:30",
"12:30-13:00",
"13:00-13:30",
"13:30-14:00",
"14-14:30",
"15:30-16:00",
"16:00-16:30",
"17:30-18:00"
];
const joinSlots = data => {
const slotMerge = (str1, str2) => {
const [start1, end1] = str1.split("-");
const [start2, end2] = str2.split("-");
return end1 === start2 ? `${start1}-${end2}` : "";
};
const output = [];
let prev = data[0];
for (let i = 1; i < data.length; i++) {
const curr = data[i];
const mer = slotMerge(prev, curr);
if (mer) {
output.push(mer);
prev = i + 1 < data.length ? data[i + 1] : undefined;
i += 1;
} else {
output.push(prev);
prev = curr;
}
}
if (prev) {
output.push(prev);
}
return output;
};
console.log(joinSlots(freeTimings));