parsing json with jquery

Question

So I have a json object

var json = {"School":{"Keywords":"HBS","SchoolName":"","SchoolUrl":"/Careers/Apply/University_recruiting/Schools/HBS.aspx"}, "School":{"Keywords":"Stanford","SchoolName":"","SchoolUrl":"/Careers/Apply/University_recruiting/Schools/Stanford.aspx"}}

And I want to loop through it to find all of the keywords in this object. I've tried $(json.School).each(function(){ console.log(this.Keywords) } but it doesn't seem to work. Any clues?

I don't think that's valid JSON; it has duplicate keys in an object. — icktoofay
– icktoofay, Commented Jun 6, 2011 at 21:24

Blender · Accepted Answer · 2011-06-06 21:32:19Z

1

Your json object is a nested dictionary array. Reference its elements with strings, like this:

$.each(json['School'], function() {...

edited Jun 6, 2011 at 21:32

answered Jun 6, 2011 at 21:24

Blender

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1 Comment

Blender Over a year ago

You should accept answers to your questions. You have asked three, and all of them are still open.

Darin Dimitrov · Accepted Answer · 2011-06-06 21:30:47Z

0

$.each is used with arrays. What you have is not an array. It is a simple javascript object with properties. Here's how an array would look like in javascript:

var json = [
    {
        "Keywords":"HBS",
        "SchoolName":"",
        "SchoolUrl":"/Careers/Apply/University_recruiting/Schools/HBS.aspx"
    }, 
    {
        "Keywords":"Stanford",
        "SchoolName":"",
        "SchoolUrl":"/Careers/Apply/University_recruiting/Schools/Stanford.aspx"
    }
];

Now you can loop:

$.each(json, function() {
    console.log(this.Keywords);
});

And here's a working live demo.

edited Jun 6, 2011 at 21:30

answered Jun 6, 2011 at 21:24

Darin Dimitrov

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6 Comments

Félix Saparelli Over a year ago

Hmm, no it wouldn't. There's no keys in an array.

Darin Dimitrov Over a year ago

@passcod, you are correct. I've updated my answer. Thanks for pointing this out.

Shawn Over a year ago

he's talking about "School". i think that would just error out. also, $.each works on objects, it iterates through all the properties and their values. $.each({a: 1, b: 2}, function (key, value) { // first iteration key = 'a', value = 1});

climboid Over a year ago

right I tried this example but still didn't work... maybe the format of the json string is incorrect?

Darin Dimitrov Over a year ago

@climboid, did you see my updated example. Here's a live demo: jsfiddle.net/V3jKG

|

Nicola Peluchetti · Accepted Answer · 2011-06-06 21:25:44Z

0

You should use for...in

for (key in json){
    if (json.hasOwnProperty(key)) {
        alert(json[key]);
    }
}

always check if the properties is of the object to avoid properties inherited from the prototype

EDIT - that is way to iterate over properties of the object, but i don't know if yours is a valid object

answered Jun 6, 2011 at 21:25

Nicola Peluchetti

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Comments

Shawn · Accepted Answer · 2011-06-06 21:34:11Z

0

First, json is a terrible variable name. The JSON there is invalid. The first { should be a [, and the last } should be an ]. You should probably just ditch that redundant "School" property as well.

Fixing that:

var schoolArray = [
    {"Keywords":"HBS","SchoolName":"","SchoolUrl":"/Careers/Apply/University_recruiting/Schools/HBS.aspx"},
    {"Keywords":"Stanford","SchoolName":"","SchoolUrl":"/Careers/Apply/University_recruiting/Schools/Stanford.aspx"}];

$.each(schoolArray, function(key, value)
{
    var keywords = value.Keywords;
    var schoolName = value.SchoolName;
});

answered Jun 6, 2011 at 21:34

Shawn

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