Solved

How to access jason value with javascript

Posted on 2014-02-02
2
204 Views
Last Modified: 2014-02-02
If I have something like this in my javascript:
var newArray = [
 { "name": "Dagny Taggart", "age": 39 }, 
 { "name": "Francisco D'Anconia", "age": 40 }, 
 { "name": "Hank Rearden", "age": 46 }
]

Open in new window

What is the best way to access the data based on the name and grab the age? I understand I could loop through with and match
 newArray[i].name

Open in new window

and grab
newArray[i].age

Open in new window

but is there another way that is easier? Is there a way to pass in a key and do something like
newArray['Dagny Taggart'] 

Open in new window

and access the data? I've never used JSON before.
0
Comment
Question by:894359
2 Comments
 
LVL 82

Accepted Solution

by:
leakim971 earned 500 total points
ID: 39828677
but is there another way that is easier?

No until it come with another structure like this :

var newArray = {
 "Dagny Taggart": 39 , 
 "Francisco D'Anconia": 40 , 
 "Hank Rearden": 46 
}

Open in new window


with your current structure, you need to loop until you find it :
var newArray = [
 { "name": "Dagny Taggart", "age": 39 }, 
 { "name": "Francisco D'Anconia", "age": 40 }, 
 { "name": "Hank Rearden", "age": 46 }
]

function getByName(name) {
   for(var i=0;i<newArray.length;i++) {
      if(newArray[i].name == name) return newArray[i];
  }
}
var age = getByName('Dagny Taggart').age;

Open in new window


Test page : http://jsfiddle.net/43RJA/1/
0
 
LVL 52

Expert Comment

by:Scott Fell, EE MVE
ID: 39828680
I have not had a chance to play, but I came across filter.js  https://github.com/jiren/filter.js  It looks like it has been active over the past couple of years.   The sample makes this look very promising and worth checking out http://jiren.github.io/filter.js/stream.html


<!DOCTYPE HTML>
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
    <link href="assets/css/jquery-ui-1.10.2.custom.min.css" media="screen" rel="stylesheet" type="text/css">
    <script src="assets/js/jquery.min.js" type="text/javascript"></script>
    <script src="assets/js/jquery-ui-1.10.2.custom.min.js" type="text/javascript"></script>
    <script src="../vendors/mustache.js" type="text/javascript"></script>
    <script src="../filter.js" type="text/javascript"></script>
    <script src="simple_filter.js" type="text/javascript"></script>
    <script src="assets/js/jquery.tinysort.min.js" type="text/javascript"></script>
    <link href="assets/css/style.css" media="screen" rel="stylesheet" type="text/css">
  </head>
  <body>
    <div><h1 class="header_name">Filter.js</h1></div>
    <div class="container">
      <div class="sidebar_bar">
        <div class="sidebar_left_find">
          <div class="sidebar_list">
            <h3>Search</h3>
            <input type="text" id="search_box" class="searchbox" placeholder="Type here...."/>
          </div>
        </div>  
        <div class="sidebar_left_find">
          <div class="sidebar_list">
            <h3>Filter by Price</h3>
            <span id="price_range_label" style="margin:50px;">$0-$500</span>
            <div id="price_slider"></div>
            <input type="hidden" id="price_filter" value="100-500"/>
          </div>
        </div>
        <div class="sidebar_left_find">
          <div class="sidebar_list">
            <h3>Filter by Status</h3>
            <ul id="status">
              <li>
                <input id="active" value="active" type="checkbox">
                <span >Active</span>
              </li>
              <li>
                <input id="inactive" value="inactive" type="checkbox">
                <span>Inactive</span>
              </li>
            </ul>
          </div>
        </div>
      </div>
      <div class="featured_services_find">
        <h1 class="result_count"></h1>
        <div class="featured_list_find" id="service_list"></div>
      </div>
      <script>
        //<![CDATA[
        var services = [
        {
            "permalink": "1-mr-ona-howe",
            "title": "Mr. Ona Howe",
            "amount": 100,
            "status": "active",
            "is_public": true,
            "id": 1,
            "nonprofit": "Eldon Zulauf"
        },
        {
            "permalink": "2-darien-hoeger",
            "title": "Darien Hoeger",
            "amount": 201,
            "id": 2,
            "status": "inactive",
            "nonprofit": "Beryl McDermott"
        },
        {
            "permalink": "3-mrs-frederique-kris",
            "title": "Mrs. Frederique Kris",
            "amount": 500,
            "id": 3,
            "status": "active",
            "nonprofit": "Eldon Zulauf"
        },
        {
            "permalink": "4-jedediah-pouros",
            "title": "Jedediah Pouros",
            "amount": 300,
            "id": 4,
            "status": "inactive",
            "nonprofit": "Mabel Tillman I"
        },
        {
            "permalink": "5-mrs-daisy-macejkovic",
            "title": "Mrs. Daisy Macejkovic",
            "amount": 410,
            "id": 5,
            "status": "active",
            "nonprofit": "Mr. Ayden O'Keefe"
        } ];
        //]]>
      </script>
      <div class="clear"></div>
    </div>

    <script id="template" type="text/html">
       <a title="{{title}}" href="/demo/{{permalink}}">
         <div class="fs_box">
           <div class="fs_left">
             <span class="fs_head">{{title}}</span>
             <span class="fs_for">for</span>
             <span class="fs_disc">{{nonprofit}}</span>
           </div>
           <div class="fs_price">${{amount}}</div>
           <div class="clear"></div>
        </div>
      </a>
    </script>
  </body>
</html>

Open in new window

0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction HTML checkboxes provide the perfect way for a web developer to receive client input when the client's options might be none, one or many.  But the PHP code for processing the checkboxes can be confusing at first.  What if a checkbox is…
Boost your ability to deliver ambitious and competitive web apps by choosing the right JavaScript framework to best suit your project’s needs.
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

864 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now