Iterate over the JSON data structure and provide a concise summary of the outcome

Question

Iterate over the JSON data structure and provide a concise summary of the outcome

I am facing an issue with calculating a JSON object and returning the average result.

Here is the JSON object in question:

var testJson = [{
                "1": "0.038728952407837",
                "2": "0.034420967102051",
                "3": "0.034113883972168",
                "4": "0.033237934112549",
                "5": "0.033545017242432",
                "6": "0.033923149108887",
                "7": "0.033990859985352",
                "8": "0.033454895019531",
                "9": "0.033518075942993",
                "10": "0.033759117126465",
                "11": "0.033965826034546",
                "12": "0.03358006477356",
                "13": "0.033926010131836",
                "14": "0.033300876617432",
                "15": "0.033140897750854",
                "16": "0.033447027206421",
                "17": "0.033830165863037",
                "18": "0.033417940139771",
                "19": "0.033578157424927",
                "20": "0.032893180847168",
            }]

Below is the code snippet I have been using:

var arr = testJson[0];
var total = 0;
for (var i = 0; i < arr.length; i++) {  
    total += arr[i];  
}
console.log(total)

The output of this code gives me a concatenated string rather than the expected result.

0.0387289524078370.0344209671020510.0341138839721680.0332379341125490.0335450172424320.0339231491088870.0339908599853520.0334548950195310.0335180759429930.0337591171264650.0339658260345460.033580064773560.0339260101318360.0333008766174320.0331408977508540.0334470272064210.0338301658630370.0334179401397710.0335781574249270.0328931808471680.0339531898498540.0339729785919190.0338070392608640.0332689285278320.0333919525146480.033372879028320.0353031158447270.0355949401855470.0359919071197510.036854982376099

I need help in identifying where I am going wrong in my approach.

javascript json

Answer 1

Answer №1

To solve the issue, you need to address the type conversion problem in your code. The values in your testJson variable are currently stored as strings. When you use string1 + string2, it combines these strings into a new string. To perform mathematical operations, you should convert these string values to Float using the parseFloat function.

if(!Object.values){Object.values=obj=>Object.keys(obj).map(key=>obj[key])}

var arr = Object.values(testJson[0]);
var total = 0;
for (var i = 0; i < arr.length; i++) {  //iterate through the array
    total += parseFloat(arr[i]);  //perform the calculation
}
console.log(total)

Alternate Solution:

if(!Object.values)Object.values=obj=>Object.keys(obj).map(key=>parseFloat(obj[key]))
var total = 0;
Object.values(testJson[0]).forEach(function(val){total += val});

The code line I included,

if(!Object.values)Object.values=obj=>Object.keys(obj).map(key=>parseFloat(obj[key]))

serves as a polyfill.

According to Wikipedia; A polyfill in web development is a piece of code that enables a feature on browsers that don't support it natively. It usually refers to a JavaScript library that implements an HTML5 standard on older browsers or a proposed standard on current browsers. Essentially, "a polyfill acts as a substitute for a browser API".[1]

Answer 2

To solve the issue, you need to address the type conversion problem in your code. The values in your testJson variable are currently stored as strings. When you use string1 + string2, it combines these strings into a new string. To perform mathematical operations, you should convert these string values to Float using the parseFloat function.

if(!Object.values){Object.values=obj=>Object.keys(obj).map(key=>obj[key])}

var arr = Object.values(testJson[0]);
var total = 0;
for (var i = 0; i < arr.length; i++) {  //iterate through the array
    total += parseFloat(arr[i]);  //perform the calculation
}
console.log(total)

Alternate Solution:

if(!Object.values)Object.values=obj=>Object.keys(obj).map(key=>parseFloat(obj[key]))
var total = 0;
Object.values(testJson[0]).forEach(function(val){total += val});

The code line I included,

if(!Object.values)Object.values=obj=>Object.keys(obj).map(key=>parseFloat(obj[key]))

serves as a polyfill.

According to Wikipedia; A polyfill in web development is a piece of code that enables a feature on browsers that don't support it natively. It usually refers to a JavaScript library that implements an HTML5 standard on older browsers or a proposed standard on current browsers. Essentially, "a polyfill acts as a substitute for a browser API".[1]

Answer 3

Answer №2

To ensure accurate calculation, convert the type to float before performing addition on JSON variables which are stored as strings. When adding strings without converting them to numbers, it results in concatenation. Use the following code snippet for conversion: total += parseFloat(arr[i]);

for (var key in arr) {
       if (arr.hasOwnProperty(key)) {
         total += parseFloat(arr[key]);
       }
     }
     console.log(total);

Answer 4

To ensure accurate calculation, convert the type to float before performing addition on JSON variables which are stored as strings. When adding strings without converting them to numbers, it results in concatenation. Use the following code snippet for conversion: total += parseFloat(arr[i]);

for (var key in arr) {
       if (arr.hasOwnProperty(key)) {
         total += parseFloat(arr[key]);
       }
     }
     console.log(total);

Answer 5

Answer №3

let sum = 0;
let data = [{
            "1": "0.038728952407837",
            "2": "0.034420967102051",
            "3": "0.034113883972168",
            "4": "0.033237934112549",
            "5": "0.033545017242432",
            "6": "0.033923149108887",
            "7": "0.033990859985352",
            "8": "0.033454895019531",
            "9": "0.033518075942993",
            "10": "0.033759117126465",
            "11": "0.033965826034546",
            "12": "0.03358006477356",
            "13": "0.033926010131836",
            "14": "0.033300876617432",
            "15": "0.033140897750854",
            "16": "0.033447027206421",
            "17": "0.033830165863037",
            "18": "0.033417940139771",
            "19": "0.033578157424927",
            "20": "0.032893180847168",
        }]
(data || []).forEach(function(obj){
    for(let key in obj ){
       sum += parseFloat(obj[key], 10);
    }
});

Answer 6

let sum = 0;
let data = [{
            "1": "0.038728952407837",
            "2": "0.034420967102051",
            "3": "0.034113883972168",
            "4": "0.033237934112549",
            "5": "0.033545017242432",
            "6": "0.033923149108887",
            "7": "0.033990859985352",
            "8": "0.033454895019531",
            "9": "0.033518075942993",
            "10": "0.033759117126465",
            "11": "0.033965826034546",
            "12": "0.03358006477356",
            "13": "0.033926010131836",
            "14": "0.033300876617432",
            "15": "0.033140897750854",
            "16": "0.033447027206421",
            "17": "0.033830165863037",
            "18": "0.033417940139771",
            "19": "0.033578157424927",
            "20": "0.032893180847168",
        }]
(data || []).forEach(function(obj){
    for(let key in obj ){
       sum += parseFloat(obj[key], 10);
    }
});

Answer 7

Answer №4

Utilize the parseFloat method.

let jsonData = sampleData[0];
let sum = 0;
for (let j = 0; j < jsonData.length; j++) {  //iterate through the data
    **sum += parseFloat(jsonData[j]);  //Perform calculation!**
}
console.log(sum)

Answer 8

Utilize the parseFloat method.

let jsonData = sampleData[0];
let sum = 0;
for (let j = 0; j < jsonData.length; j++) {  //iterate through the data
    **sum += parseFloat(jsonData[j]);  //Perform calculation!**
}
console.log(sum)

Iterate over the JSON data structure and provide a concise summary of the outcome

Answer №1

Answer №2

Answer №3

Answer №4

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