Retrieve the total number of arrays from the API, rather than fetching the actual data

Question

Retrieve the total number of arrays from the API, rather than fetching the actual data

I'm attempting to retrieve the total number of arrays of validators (e.g. 1038) from a JSON file using the code below, but it doesn't seem to be working as expected.

Can anyone spot what's wrong with my code?

let data = fetch("https://avax.dev/data/validators.json");

data
 .then(response => response.json())
 .then(data => {
     console.log(data)
     
     let count = Object.keys(validators).length;

     console.log(count);
 });

javascript

Answer 1

Answer №1

Within your code snippet, the variable "d" represents an object. Inside this object, there is a key named "validators", which has an array as its corresponding value. To retrieve the length of the validators array, you can access it by using "d.validators.length".

const fetchData = fetch("https://website.com/data/validator.json");
   
fetchData.then(response => response.json())
.then(data => { 
    console.log(data);
    // Accessing the array length through d.validators.length
    console.log(data.validators.length);

})

Answer 2

Within your code snippet, the variable "d" represents an object. Inside this object, there is a key named "validators", which has an array as its corresponding value. To retrieve the length of the validators array, you can access it by using "d.validators.length".

const fetchData = fetch("https://website.com/data/validator.json");
   
fetchData.then(response => response.json())
.then(data => { 
    console.log(data);
    // Accessing the array length through d.validators.length
    console.log(data.validators.length);

})

Answer 3

Answer №2

I decided to tidy up the code as well.

The issue was that you were attempting to access the validators array outside of the .then block. Therefore, the data (d) we receive is what I utilized to retrieve the validators.

let fetchData = fetch("https://avax.dev/data/validators.json");

// fetchData represents a promise to be resolved
// using the .then() method

fetchData
  .then((response) => response.json())
  .then((d) => {
    console.log(d);
    let length = d.validators.length;
    console.log(length);
  });

Answer 4

I decided to tidy up the code as well.

The issue was that you were attempting to access the validators array outside of the .then block. Therefore, the data (d) we receive is what I utilized to retrieve the validators.

let fetchData = fetch("https://avax.dev/data/validators.json");

// fetchData represents a promise to be resolved
// using the .then() method

fetchData
  .then((response) => response.json())
  .then((d) => {
    console.log(d);
    let length = d.validators.length;
    console.log(length);
  });

Answer 5

Answer №3

Your current issue involves attempting to access the length of the validators field outside of the promise resolution. The problem lies in the fact that the following lines

var len = Object.keys(validators).length;
console.log(len);

are executed before the console.log(d). Additionally, the variable d is not accessible outside of the .then().

To resolve this, simply move the code inside the .then():

fetchRes
.then(res => res.json())
.then(d => {    
    const length = d.validators.length;
    console.log(length);
})

Answer 6

Your current issue involves attempting to access the length of the validators field outside of the promise resolution. The problem lies in the fact that the following lines

var len = Object.keys(validators).length;
console.log(len);

are executed before the console.log(d). Additionally, the variable d is not accessible outside of the .then().

To resolve this, simply move the code inside the .then():

fetchRes
.then(res => res.json())
.then(d => {    
    const length = d.validators.length;
    console.log(length);
})

Retrieve the total number of arrays from the API, rather than fetching the actual data

Answer №1

Answer №2

Answer №3

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