Javascript中数组与字典(即map)的使用

2022-11-09 13:16:48

简述：

简单记录一下数据结构Map和数组，

其实在Javascript这种弱类型的脚本语言中，数组同时也就是字典，下面主要就是字典数组的简易使用

代码：

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Test</title>
<script type="text/javascript">
var arr = [];
var key = 'Jeremy';
var value = '!!!!'
arr.push({
'key': key,
'value': value,
});
document.write("key: " + arr[0]['key'] +
"<br/>value: " + arr[0]['value']);
</script>
</head>
<body>
</body>
</html>

输出0：

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Test</title>
</head>
<body>
<script type="text/javascript">
var arr = [];
arr.push("Jeremy");
arr.push("Jimmy");
for(var i in arr)
document.write(i + ": " + arr[i] + "</br>");
</script>
</body>
</html>

输出1：

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Test</title>
</head>
<body>
<script type="text/javascript">
var dict = []; //or dict = new Array()
dict["Jeremy"] = 20;
dict["Jimmy"] = 30;
for(var key in dict)
document.write(key + ": " + dict[key] + "</br>");
</script>
</body>
</html>

输出2：

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Test</title>
</head>
<body>
<script type="text/javascript">
var dict = {
"Jeremy" : 20,
"Jimmy" : 30
};
for(var key in dict)
document.write(key + ": " + dict[key] + "</br>");
</script>
</body>
</html>

输出3：

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Test</title>
</head>
<body>
<script type="text/javascript">
var dict = {
"Jeremy" : ["Chinese", "Math"] ,
"Jimmy" : ["Art", "English"]
};
var name = "Jeremy";
for(var courseIndex in dict[name])
document.write(dict[name][courseIndex] + "</br>");
</script>
</body>
</html>

输:4：

下面的逻辑就是学生：课程列表：某门的课程信息

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Test</title>
</head>
<body>
<script type="text/javascript">
var dict = [];
var courseListOfJeremy = [
{"Chinese" : 3},
{"Math": 5}
];
dict['Jeremy'] = courseListOfJeremy;
var courseListOfJimmy = [
{"Art": 3},
{"English": 5}
];
dict['Jimmy'] = courseListOfJimmy;
document.write("Jimmy's Course Number Of Chinese: " + dict['Jeremy'][0]['Chinese']);
</script>
</body>
</html>

输出5：

http://blog.csdn.net/anialy/article/details/8295765

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