Receiving JSON data and saving it into an array in JavaScript

Question

Receiving JSON data and saving it into an array in JavaScript

I have a JSON input that contains information about different categories including companies, countries, and persons.

{
    "Categories": {
        "Facets": [{
            "count": 1,
            "entity": "Company",
            "Company": [{

                "entity": "Ford Motor Co",

                "Ford_Motor_Co": [{
                    "count": 1,
                    "entity": "Ford"
                }]
            }]
        }, {
            "count": 4,
            "entity": "Country",
            "Country": [{

                "entity": "Germany",
                "Germany": [{
                    "count": 1,
                    "entity": "Germany"
                }],
                "currency": "Euro (EUR)"
            }, {

                "entity": "Italy",
                "Italy": [{
                    "count": 1,
                    "entity": "Italy"
                }],
                "currency": "Euro (EUR)"
            }, {

                "entity": "Japan",
                "Japan": [{
                    "count": 1,
                    "entity": "Japan"
                }],
                "currency": "Yen (JPY)"
            }, {

                "entity": "South Korea",
                "South_Korea": [{
                    "count": 1,
                    "entity": "South Korea"
                }],
                "currency": "Won (KRW)"
            }]
        }, {
            "count": 5,
            "entity": "Persons",
            "Persons": [{
                "count": 2,
                "entity": "Dodge"
            }, {
                "count": 1,
                "entity": "Dodge Avenger"
            }, {
                "count": 1,
                "entity": "Major League"
            }, {
                "count": 1,
                "entity": "Sterling Heights"
            }]
        }]

    }
}

I am trying to extract the values of the entity at each level in the JSON structure and store them in an array.

[Company, Ford Motor Co, Ford, ....... , Sterling Heights]

Currently, I can access the entities at the first level using the following code:

for (var k in h.Categories.Facets)
{

alert(h.Categories.Facets[k].entity);

}

However, I need help in navigating through the inner levels to retrieve all entity values. How can I achieve this?

javascript arrays json

Answer 1

Answer №1

To iterate through each entity, consider using a foreach loop. If the number of levels is known, nesting loops can be implemented. Otherwise, opt for a recursive function to handle the entities more efficiently.

Additional Information

Here is an example of a recursive function:

function retrieveEntities(entity)
{
   alert(entity);
   for (var level in entity)
   {
      retrieveEntities(entity[level].entity);
   }
}

Then utilize the function like this:

for (var key in data.Categories.Facets)
{
   retrieveEntities(data.Categories.Facets[key]);
}

Best of luck with your implementation!

Answer 2

To iterate through each entity, consider using a foreach loop. If the number of levels is known, nesting loops can be implemented. Otherwise, opt for a recursive function to handle the entities more efficiently.

Additional Information

Here is an example of a recursive function:

function retrieveEntities(entity)
{
   alert(entity);
   for (var level in entity)
   {
      retrieveEntities(entity[level].entity);
   }
}

Then utilize the function like this:

for (var key in data.Categories.Facets)
{
   retrieveEntities(data.Categories.Facets[key]);
}

Best of luck with your implementation!

Answer 3

Answer №2

This is a versatile recursive function:

function findEntities(input) {
    var entities = [];
    if ('entity' in input) {
        entities.push(input.entity);
    }
    for (var property in input) {
        if (input[property] instanceof Object && input.hasOwnProperty(property)) {
            entities.append(findEntities(input[property]));
        }
    }
    return entities;
}
console.log(findEntities(someInput));

The following line:

 if (input[property] instanceof Object && input.hasOwnProperty(property)) {

Prevents errors with numbers and null values, while input.hasOwnProperty(property) accommodates frameworks that modify the Object prototype.

Answer 4

This is a versatile recursive function:

function findEntities(input) {
    var entities = [];
    if ('entity' in input) {
        entities.push(input.entity);
    }
    for (var property in input) {
        if (input[property] instanceof Object && input.hasOwnProperty(property)) {
            entities.append(findEntities(input[property]));
        }
    }
    return entities;
}
console.log(findEntities(someInput));

The following line:

 if (input[property] instanceof Object && input.hasOwnProperty(property)) {

Prevents errors with numbers and null values, while input.hasOwnProperty(property) accommodates frameworks that modify the Object prototype.

Answer 5

Answer №3

An effective approach involves creating a recursive function that takes an array as input and extracts the elements from it.

Answer 6

An effective approach involves creating a recursive function that takes an array as input and extracts the elements from it.

Answer 7

Answer №4

To efficiently handle nested combinations, one effective approach is to implement a recursive function that iterates through all possible combinations:

const allEntities = [];
function extractNestedEntities(obj) {
   if (obj !== null) {
       const entityName = obj["entity"];
       console.log(entityName);
       if (entityName !== null) {
           allEntities.push(entityName);
           const adjName = entityName.replace(/ /gi, "_");
           const entities = obj[adjName];
           if (entities !== null) {
               for (let e in entities) {
                   const innerEntities = extractNestedEntities(entities[e]);
                   for (let inner in innerEntities) {
                       allEntities.push(innerEntities[inner]);
                   }
               }
           }
       }
   }
}    

for (let k in h.Categories.Facets) {
    console.log(h.Categories.Facets[k].entity);
    extractNestedEntities(h.Categories.Facets[k]);
}
console.log(allEntities.length);

Answer 8

To efficiently handle nested combinations, one effective approach is to implement a recursive function that iterates through all possible combinations:

const allEntities = [];
function extractNestedEntities(obj) {
   if (obj !== null) {
       const entityName = obj["entity"];
       console.log(entityName);
       if (entityName !== null) {
           allEntities.push(entityName);
           const adjName = entityName.replace(/ /gi, "_");
           const entities = obj[adjName];
           if (entities !== null) {
               for (let e in entities) {
                   const innerEntities = extractNestedEntities(entities[e]);
                   for (let inner in innerEntities) {
                       allEntities.push(innerEntities[inner]);
                   }
               }
           }
       }
   }
}    

for (let k in h.Categories.Facets) {
    console.log(h.Categories.Facets[k].entity);
    extractNestedEntities(h.Categories.Facets[k]);
}
console.log(allEntities.length);

Receiving JSON data and saving it into an array in JavaScript

Answer №1

Answer №2

Answer №3

Answer №4

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