Loop through multidimensional Json

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I have a multilevel JSon and need to loop through and get its column name and value.

 var json   {  
       "Students":[  
          {  
             "name":{  
                "value":"Allan"
             },
             "number":{  
                "value":"123"
             }
          },
          {  
             "name":{  
                "value":"Frank"
             },
             "number":{  
                "value":"456"
             }
          }
       ]
    }

I can loop through and get the column name but cannot get the value.

var objectKeys = Object.keys(json); 
for (var key in objectKeys)
    {       
        var student = json.Students;

        for (var i = 0; i < student .length; i++) {

            for (var column in json.Students[i])
                {

                window.print(column);
                window.print(column.value);                                         

            }

        }       
}

The above gives me the following

name
undefined
number
undefined
name
undefined
number
undefined

Ideally i want to treat one row separately so i can insert it in database, like insert Allan and 123 against name and number column of students table.

var objectKeys = Object.keys(json);
for (var key in objectKeys)
{       
    var student = json.Students;

    for (var i = 0; i < student .length; i++) {

        for (var column in json.Students[i]) {
            window.print(column);
            window.print(json.Students[i][column].value);

        }

    }
}

since key in outer for loop isn't used it is redundant

Iterate elements in multidimensional JSON array - JavaScript, Tell us what's happening: I m trying to iterate entire JSON array newData -data-​structures/iterate-through-all-an-arrays-items-using-for-loops/. So multidimensional arrays in JavaScript is known as arrays inside another array. We need to put some arrays inside an array, then the total thing is working like a multidimensional array. The array, in which the other arrays are going to insert, that array is use as the multidimensional array in our code.

var objectKeys = Object.keys(json); 
for (var key in objectKeys) {       
    var student = json.Students;
    for (var i = 0; i < student .length; i++) {
        window.print(json.Students[i].name.value);
        window.print(json.Students[i].number.value);

    }       
}

How to loop through a complex JSON tree of objects and arrays in , There are a few ways to loop over JavaScript Object Properties! I have found 3 ways! If you prefer a video of a explanation, Ive just created it! The Object to loop​  \$\begingroup\$ I have a JSON with multi-dimensional arrays. My request can return one or 300 + objects per service request type, i.e. BulkyItems, ElectronicWaste, etc. When I use the same logic that I have built to loop through decoded2 I receive key errors.

Your JSON object contains 1 entry with key Students and value of a list of 2 dictionaries.

so var objectKeys = Object.keys(json); represents just one value "Students"

It doesn't look like you're using the var key in objectKeys as you instantiate this variable key but never use it.

Re-write your code like this if your intent is to loop through the dictionary:

 var json   {  
       "Students":[  
          {  
             "name":{  
                "value":"Allan"
             },
             "number":{  
                "value":"123"
             }
          },
          {  
             "name":{  
                "value":"Frank"
             },
             "number":{  
                "value":"456"
             }
          }
       ]
    }

for(let i = 0; i < json["Students"].length; i++){

    let key_values = Object.keys(json["Students"][i]);

    for(let inner_key_values in key_values){
        window.print(json["Students"][i][inner_key_values].value);
    }

}

JSON to object for multidimensional array, This happens in my example with the foreach loop. However you can also iterate through the "arrays" in the classical way. JSONNode values  Convert and Loop through JSON with PHP and JavaScript Arrays/Objects. September 30, 2014 by. If you’re working with JSON (JavaScript Object Notation) and either need to convert a JSON string to array or object and loop through it or vice-versa, take an array or object and convert it to a JSON string to return, both can be done in PHP or JavaScript.

I wrote the below snippet for you - It prints a nested object recursively. You can modify it as you want.

var p = {
    "p1": "value1",
    "p2": "value2",
    "p3": "value3",
    "p4": {
        "p4": 'value 4'
    }
};



/**
*   Printing a nested javascript object
*/
function jsonPrinter(obj) {

    for (let key in obj) {
        // checking if it's nested
        if (obj.hasOwnProperty(key) && (typeof obj[key] === "object")) {
            jsonPrinter(obj[key])
        } else {
            // printing the flat attributes
            console.log(key + " -> " + obj[key]);
        }
    }
}

jsonPrinter(p);

Javascript loop through multidimensional json array, Now let's look at more advanced techniques to parse multi-dimensional JSON array in SSIS ( e. JavaScript loop through json array? Possible duplicate of Loop​  For this reason, we can say that a JavaScript multidimensional array is an array of arrays. The easiest way to define a multidimensional array is to use the array literal notation. To declare an empty multidimensional array, you use the same syntax as declaring one-dimensional array: let activities = [];

JSON Array – REST API Tutorial, Loop through array values. You can access array values by using a for-in loop: inside JSON array, it is known as array of arrays or multidimensional array. Arrays in JSON are almost the same as arrays in JavaScript. In JSON, array values must be of type string, number, object, array, boolean or null. In JavaScript, array values can be all of the above, plus any other valid JavaScript expression, including functions, dates, and undefined.

Foreach Loop through Multidimensional Array in PHP, You can simply use the foreach loop in combination with the for loop to access and retrieve all the keys, elements or values inside a multidimensional array in  JSON (JavaScript Object Notation) is a popular and special type of data format used for data manipulation. First of all, we will see how to loop through keys and then we will see how to loop through subkeys also. So, let’s start… Iterate through JSON with keys in Python

How to iterate through JSON Object with members? · Issue #15 , You can use for loop. for (var key in obj) { if (obj.hasOwnProperty(key)) { console.​log(key + ": " + obj  Foreach loop through multidimensional array in PHP. Topic: PHP / MySQL Prev|Next. Answer: Use the PHP nested loop. You can simply use the foreach loop in combination with the for loop to access and retrieve all the keys, elements or values inside a multidimensional array in PHP.

Comments
  • What's your desired output?
  • Read and enjoy: for...in
  • Thanks Jero for your input, i am not allowed to mark your answer as useful because i do not have enough points but displayName solution was more dynamic as i didn't have to specify the column name hence marked that as the answer