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map.html
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map.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
</body>
<script src="../public/js/jquery-3.5.1.min.js"></script>
<script>
//questions map():string => []
const questions = new Map();
//myArray 从数据库获取的数据
let myArray = new Array();
$.ajax({
type: "post",
url:'http://127.0.0.1:3001/api/tab_video/question/list/search/id=' + 1,
contentType: "application/json",
dataType: "jsonp",
success: function (data) {
// console.log('原始数据：data:',data[0].question_list);
let tempArray1 = new Array();
//todo:去掉杠号
let tempArray0 = data[0].question_list.split("-");
tempArray0.forEach(function (item) {
tempArray1.push(item)
});
// console.log('1.去掉杠号：tempArray1[]',tempArray1);
tempArray1.forEach(function (item,index) {
//todo:去掉大括号
let tempArray2;
tempArray2 = removeBlock(item);
// console.log('2.去掉大括号：tempArray2[]',tempArray2);
//todo：去掉逗号
tempArray2 = tempArray2.split(",");
// console.log("3.去掉逗号：tempArray2[]",tempArray2);
let time;
let question_id;
tempArray2.forEach(function (item) {
//todo：去掉冒号
let tempArray3 = item.split(":");
// console.log("4.去掉冒号：tempArray3[]",tempArray3);
if (tempArray3[0] == 'question_id'){
question_id = tempArray3[1]
}
if (tempArray3[0] == 'time'){
time = tempArray3[1]
}
});
// console.log('question_id=>time：[index:',index,']',question_id,"=>",time);
//todo：临时json
let tempJson = {
time:time,
question_id:question_id
};
// console.log('临时json：',tempJson);
//todo：push到myArray
myArray.push(tempJson);
});
console.log('从数据库获得的数据：',myArray);
//todo:遍历从数据库获取的数组
myArray.forEach(function (item) {
let mapElement = questions.get(item.time.toString());
if (mapElement != undefined){
//todo:如果存在，get然后push再set
let temp = questions.get(item.time.toString());
temp.push(item.question_id.toString());
questions.set(item.time.toString(),temp)
}
if (mapElement == undefined){
//todo:如果不存在，push再set
let temp = new Array();
temp.push(item.question_id.toString());
questions.set(item.time.toString(),temp);
}
});
questions.forEach(function (value, key, map) {
console.log('时间点：',key,'；问题id：',value);
let index = Math.floor((Math.random()*value.length));
console.log('随机问题id：',value[index]);
console.log('------------');
});
}
});
//todo:封装：去除{}
function removeBlock (str) {
if (str) {
var reg = /^\{/gi;
var reg2 = /\}$/gi;
str = str.replace(reg, '');
str = str.replace(reg2, '');
return str
} else {
return str
}
}
</script>
</html>