asked on 7/16/2008

JSON Array Loop in Javascript (newbie question)

I have the following JSON object:

var json = {"Product":[{"Product_Title":"Beach hat"},{"Product_Title":"Blue Jeans"}]};

I am using the following loop to get records:

for (var x in json.Product) {
alert(json.Product[x].Product_Title);
}

This code is working fine while there is more than one record. When my JSON looks like this (single record):

var json = {"Product":{"Product_Title":"Blue Jeans"}};

I can no longer access the record from the above loop. I thought I should be able to access the single record like this "json.Product[0].Product_Title" however it turns out I should access it like this "json.Product.Product_Title" which means that I have to write more code to accommodate single records. I believe there should be a better solution please help.

JavaScript JScript

Last Comment

hielo

7/17/2008

hielo

7/16/2008

>>I thought I should be able to access the single record like this "json.Product[0].Product_Title"
That zero in Product[0] works because on your first sample code, "Product" IS an array of objects. Notice that it has:
"Product":[....]

the other one is NOT an array. It is a direct object assignment.

var json = {"Product":{"Product_Title":"Blue Jeans"}};
for( i in json )
{
alert( i );
	for( j in json[i] )
	{
		alert( j + " = " + json[i][j] );
	}
}

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pravetz

7/16/2008

ASKER

I guess you are right. So there is no elegant solution to this?
If the single record was formatted like this it would work:

var json = {"Product":[{"Product_Title":"Blue Jeans"}]};

Unfortunately I am getting the JSON from a converter (Json.NET) and I have no control over the formatting.

My current solution is something like this (could it be better?):

if (json.Product.length == undefined){
alert(json.Product.Product_Title);
}
 
else {
 
for (var x in json.Product) {
      alert(json.Product[x].Product_Title);
}
}

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ASKER CERTIFIED SOLUTION

hielo

7/17/2008

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pravetz

7/17/2008

ASKER

Yeah thats better than mine solution!
What is this part about?

var t = new Array();

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hielo

7/17/2008

>>What is this part about?
Sorry. Not necessary. I was initially declarring an array variable and then pushing data into the array, but since this is a one element array then you can do it directly via new Array() like I'm doing here:
json.Product = new Array(json.Product );