I'm struggling with a task in javascript. I want to extract the value from an array in an API. I want to get the last_price in the Monet_ADA array. Here is the data in the API.
641f0571d02b45b868ac1c479fc8118c5be6744ec3d2c5e13bd888b6.ZOMBIE_ADA: {last_price: 0.0016, base_volume: 0, quote_volume: 0} 682fe60c9918842b3323c43b5144bc3d52a23bd2fb81345560d73f63.NEWM_ADA: {last_price: 2.4e-8, base_volume: 0, quote_volume: 0} 722c45e8ba2a3c399cf09949abe74546ecb75defb8206914085dc28e.CDX_ADA: {last_price: 0.22, base_volume: 0, quote_volume: 0} 776da8416dc56107275424b009eb82353235f10ef8e0b77088fd7964.TrustCoin_ADA: {last_price: 0.00006, base_volume: 0, quote_volume: 0} 782c158a98aed3aa676d9c85117525dcf3acc5506a30a8d87369fbcb.Monet_ADA: {last_price: 1.1e-9, base_volume: 0, quote_volume: 0} 804f5544c1962a40546827cab750a88404dc7108c0f588b72964754f.VYFI_ADA: {last_price: 0.0000019, base_volume: 0, quote_volume: 0} 815f432f5d9b36e77989d0fea374292e9c8330c5146ca8500632b3cf.Squid_ADA: {last_price: 'NA', base_volume: 0, quote_volume: 0} 823f7c8e25ee35f368daf2c9b6b4783c1d9a763eb5227b50b095f6c2.Djedi_ADA: {last_price: 'NA', base_volume: 0, quote_volume: 0} 0864aa509385d78b9d83e8547424a055bb93e152a767383c6e0ea854.AINU_ADA: {last_price: 'NA', base_volume: 0, quote_volume: 0}
Here is my code:
const api_url = 'http://analytics.muesliswap.com/ticker';
async function getMonetPrice(){
const response = await fetch (api_url);
const data = await response.json();
console.log(data);
}
getMonetPrice();
My code doesn't throw an error, it just returns all the data in the API. I need help parsing through the data and then returning just the last_price value in the Monet.ADA array. Please and thank you.
It's an object, not an array, but you can still iterate over it.
Extract the key/value from each Object.entries, and check to see if the key endsWith "Monet_ADA".
In this example I'm passing in an endpoint, and a query object, to make life a little easier.
// Get the data
function getData(endpoint) {
return fetch(endpoint);
}
// Accept the data, and a query object
function finder(data, { type, prop }) {
// Iterate over the object entries and get the
// key/value from each
for (const [key, value] of Object.entries(data)) {
// If the key ends with the query type
// return the query prop value
if (key.endsWith(type)) return value[prop];
}
// Otherwise return a default message
return 'No value available';
}
// Accept an endpoint, and a query object,
// get the data, and parse it. Then call `finder`
// with the data, and the query
async function main(endpoint, query) {
const response = await getData(endpoint);
const data = await response.json();
const lastPrice = await finder(data, query);
console.log(lastPrice);
}
const endpoint = 'https://analytics.muesliswap.com/ticker';
const query = { type: 'Monet_ADA', prop: 'last_price' };
main(endpoint, query);const apiURL = 'http://analytics.muesliswap.com/ticker';
// Returns false on failure, or price on success
const getMonetPrice = async (apiURL) => {
try {
const response = await fetch(apiURL);
const { '782c158a98aed3aa676d9c85117525dcf3acc5506a30a8d87369fbcb.Monet_ADA': monetPrice } = await response.json();
if (!monetPrice) {
throw "Couldn't find monetPrice";
return;
}
const { last_price } = monetPrice;
if (!last_price) {
throw "Couldn't find last_price";
return;
}
return last_price;
} catch (error) {
return false;
}
};
const run = async () => {
const monetPrice = await getMonetPrice(apiURL);
console.log('monetPrice', monetPrice);
};
run();
It looks like the data is an object with obscure keys, one of them ending in a string that the OP aims to get at. First find the key...
const key = Object.keys(data).find(k => k.endsWith('Monet_ADA'));
const lastPrice = key ? data[key].last_price : null;