Detailed explanation of the steps to obtain key and value in js loop map-JS Tutorial-php.cn

Detailed explanation of the steps to obtain key and value in js loop map

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Release： 2018-05-30 15:05:06

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This time I will bring you a detailed explanation of the steps to obtain key and value with js loop map. What are the precautions for js loop map to obtain key and value? The following is a practical case, let's take a look.

The following method 1 and method 2 have been tested and run by the editor of Script House

Method 1: json format definition

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<script>
var dxy={
//Page地址 
  pageUrl : { 
    menu      :  "loadPage.htm?url=/collect/menu.page",     // 进入菜单页面 
    guangfaPage   :  "loadPage.htm?url=/collect/menu.page",     // 进入广发信息收集页面 
    pinganPage   :  "loadPage.htm?url=/collect/menu.page",     // 进入平安信息收集页面 
    nuonuoPage   :  "loadPage.htm?url=/collect/menu.page",     // 进入诺诺信息收集页面 
    youbangPage   :  "loadPage.htm?url=/collect/menu.page",     // 进入友邦信息收集页面 
    inputMobileNo : "loadPage.htm?url=/collect/inputMobileNo.page",  // 进入输入手机号页面 
    readIdCard   : "loadPage.htm?url=/collect/readIdCard.page",    // 进入读取身份证页面 
    member     : "loadPage.htm?url=/collect/member.page",      // 进入输入会员卡号页面 
    bankCard    : "loadPage.htm?url=/collect/bankCard.page",     // 进入插入银行卡页面 
    url      : "loadPage.htm?url=/collect/url.page"        // 进入跳转url页面 
  } 
}
for(var key in dxy.pageUrl){ 
  alert(key+" : "+dxy.pageUrl[key]); 
}
</script>
</body>
</html>

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Code 2,

var obj = { 
 "a": 1, 
 "b": 2, 
 "c": 3 
}; 
 
for (var prop in obj) { 
 if (obj.hasOwnProperty(prop)) {  
 // or if (Object.prototype.hasOwnProperty.call(obj,prop)) for safety... 
  alert("prop: " + prop + " value: " + obj[prop]) 
 } 
}

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The following are the supplements of other netizens. You can refer to them

javascriptLoopTraverse the arrayOutput key value

javascript loops through the array to output key value
Using the $.each method will definitely not work, so use the following method

markers = [];
    markers[2]=3;
    markers[3]=7;
    for(var key in markers){
      console.log( key )
      console.log( markers[key] )
    }

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I believe you have mastered the method after reading the case in this article. For more exciting things, please pay attention to php Other related articles on the Chinese website!