json.parse array of objects

stackoverflow.com › questions › 11468806 › json-parse-for-array-of-object

This works perfectly

    function myFunction(dataFromServer){
       var parsedJSON = JSON.parse(dataFromServer.d);
       for (var i=0;i<parsedJSON.length;i++) {
            alert(parsedJSON[i].Id);
       }
    }

But this doens't

    function myFunction(dataFromServer){
        var parsedJSON = JSON.parse(dataFromServer.d);
        for (var item in parsedJSON) {
            alert(item.Id);
        }
    }

Answer from user266003 on Stack Overflow

Stack Overflow

stackoverflow.com › questions › 11468806 › json-parse-for-array-of-object

JSON.parse for array of object - javascript

Top answer

1 of 5

20

This works perfectly

    function myFunction(dataFromServer){
       var parsedJSON = JSON.parse(dataFromServer.d);
       for (var i=0;i<parsedJSON.length;i++) {
            alert(parsedJSON[i].Id);
       }
    }

But this doens't

    function myFunction(dataFromServer){
        var parsedJSON = JSON.parse(dataFromServer.d);
        for (var item in parsedJSON) {
            alert(item.Id);
        }
    }

2 of 5

3

You can just access them as you would any object:

var id = item.Id;
if (item.IsGood) { ... }

If you wish to enumerate them to use somehow, have a look at this SO question.

JSON.parse result to proper array of objects

Parse JSON array of arrays

JSON.parse to an object array

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Parsing JSON - json array of arrays

More results from stackoverflow.com

reddit.com › r/learnprogramming › large array of objects in json for json.parse() in javascript

r/learnprogramming on Reddit: Large array of objects in JSON for JSON.parse() in JavaScript

March 10, 2020 -

I need to manually convert a csv file to JSON via code, and then parse it in JavaScript. Problem is I can't seem to figure out how to get it into a format that JSON.Parse() accepts

For example this format is considered invalid:

var parsedJson = JSON.parse([{"Field1" : "123", "Field2": "123"}, {"Field1" : "123", "Field2" : "123"}]);

I just get an invalid token o error.

My actual JSON has 3 columns, and the first one is used to identify the row. I was thinking of parsing the JSON and creating a dictionary with the first value as a key, and the 2nd and 3rd fields concatenated somehow as the value.

Can someone help?

Top answer

1 of 1

4

The issue is that JSON.parse takes a string; you're passing it an object literal. It's used for taking a string that contains JSON-formatted data and converting it into a JS object. But what you have here doesn't need to be parsed; you can just set a variable equal to it directly. Alternatively, wrap the entire contents inside JSON.parse() with single-quotes or back-ticks (the ` character). creating a dictionary with the first value as a key, and the 2nd and 3rd fields concatenated somehow as the value. Don't concatenate them; use objects.

Discussions

How to parse an array of a json Object?

so why are you stringifying then parsing it again? Also post what the JSON looks like (abbreviated if necessary) A. L – A. L · 2017-04-14 08:21:10 +00:00 Commented Apr 14, 2017 at 8:21 ... Can you give an example of what the JSON looks like? You're running .length on an object; an object ... More on stackoverflow.com

stackoverflow.com

Parsing JSON Request. Find object in array

Here is an image to show the JSON layout, to compare to the assertions above. ... Note that the [0] would be looking at the first item in the array… if you wanted the second it would be [1] third would be [2] and so on (remember array indexes start at 0). ... Sorry, I think I didn’t explain myself properly. Maybe my example was to simple to explain what I was looking for. I don’t want to access the value based on the index of ... More on community.postman.com

community.postman.com

4

1

February 6, 2022

How to parse JSON Array of objects in python - Stack Overflow

Copy[{ "username": "username_1", ... such objects>..] Given that typeof(response) gives me requests.models.Response, how can I parse it in Python? ... You need to use the json module. ... Possible duplicate of Convert string to JSON using Python if not, then it's an array which means ... More on stackoverflow.com

stackoverflow.com

Large array of objects in JSON for JSON.parse() in JavaScript

The issue is that JSON.parse takes a string; you're passing it an object literal. It's used for taking a string that contains JSON-formatted data and converting it into a JS object. But what you have here doesn't need to be parsed; you can just set a variable equal to it directly. Alternatively, wrap the entire contents inside JSON.parse() with single-quotes or back-ticks (the ` character). creating a dictionary with the first value as a key, and the 2nd and 3rd fields concatenated somehow as the value. Don't concatenate them; use objects. More on reddit.com

r/learnprogramming

2

1

March 10, 2020

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