Question

21

json and multidimensional array

rated 0 times [ 27] [ 6] / answers: 1 / hits: 44472 / 13 Years ago, thu, february 16, 2012, 12:00:00

I have a multidimensional array like this

Array

(

    [1] => Array

        (

            [product_id] => 1

            [product_model] => HFJ5G1.5

            [product_type] => plat

            [product_return] => graviteits



        )



    [2] => Array

        (

            [product_id] => 2

            [product_model] => HHJ5S2.5

            [product_type] => holle plunjer

            [product_return] => veer       



        )

    );  //Only 2 are shown here i have around 110 values

And i encoded this to json by

json_encode($array);

The resulted jsonString is something like this

{1:{product_id:1,product_model:HFJ5G1.5,product_type:plat,product_return:graviteits},2:{product_id:2,product_model:HHJ5S2.5,product_type:holle plunjer,product_return:veer}}

when i do alert(jsonString.length); the result is 4 But i want the result to be 2 am i doing something wrong .

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

collinisaaka

Add To Favorites

Follow

Total Points: 194

Total Questions: 105

Total Answers: 104

Location: Tonga

Member since Tue, Nov 30, 2021

3 Years ago

collinisaaka questions

1 Compare two arrays of objects, and remove if object value is equal

Wed, Mar 2, 22, 00:00, 2 Years ago

1 REACTJS giving the following error: TypeError: navigate.push is not a function

Tue, Nov 23, 21, 00:00, 3 Years ago

1 ReferenceError: Cannot access before initialization circular dependency

Fri, Jul 9, 21, 00:00, 3 Years ago

1 React Hook useEffect to fetch data from local json file to create a details page

Tue, Sep 15, 20, 00:00, 4 Years ago

1 create a curved bottom navigation (before after implementation)

Wed, Jul 1, 20, 00:00, 4 Years ago

View All

answered 13 Years ago marvinm · Accepted Answer

an object literal has no .length

you can count properties using this method:

var count = 0;



for (i in jsonString) {

    if (jsonString.hasOwnProperty(i)) {

        count++;

    }

}



alert(count); //count shall have length for you

OR

since your array didn't have numeric indices (starting from 0), it assumed you used an associative array, hence they dumped an object of items rather than an array of items.

to turn them to numeric indices, all you have to do is use array_values before encoding them to json:

json_encode(array_values($array));

then the json will be an array.. then you can use length

from this:

Array(

[1] => Array(

        [product_id] => 1

        [product_model] => HFJ5G1.5

        [product_type] => plat

        [product_return] => graviteits

    )

[2] => Array(

        [product_id] => 2

        [product_model] => HHJ5S2.5

        [product_type] => holle plunjer

        [product_return] => veer       

    )

);

it becomes this using array_values(), note the indexes per item:

Array(

[0] => Array(

        [product_id] => 1

        [product_model] => HFJ5G1.5

        [product_type] => plat

        [product_return] => graviteits

    )

[1] => Array(

        [product_id] => 2

        [product_model] => HHJ5S2.5

        [product_type] => holle plunjer

        [product_return] => veer       

    )

);

then encoded to json and stored to jsonString:

jsonString = [

    {

        product_id: 1,

        product_model: HFJ5G1.5,

        product_type: plat,

        product_return: graviteits

    },

    {

        product_id: 2,

        product_model: HHJ5S2.5,

        product_type: holle plunjer,

        product_return: veer

    }

];



alert(jsonString.length);