How to parse multi dimensional JSON data that does not have a key through Javascript?

Question

I have valid JSON data as :

{
 "bitcoin": [
    "-0.47",
    "-0.46",
    "-0.42"
 ],
 "maker": [
    "8.29",
    "8.29",
    "6.89"
 ]
}

How can I get values from such data where there is no key?

Edit: with the help of @kolzar and @FZs, I simply managed it by following code:

for (var key in obj) {
  console.log(key + obj[key]);
}

Answer 1

In arrays ([...]), keys are numbers.
In JS, you can access properties two ways:

• container[key_as_expression] or
• container.key_as_identifier

Since JS identifiers don't allow to an identifier begin with a number, number keys can only be accessed through the first way:

data={
 "bitcoin": [
    "-0.47",
    "-0.46",
    "-0.42"
 ],
 "maker": [
    "8.29",
    "8.29",
    "6.89"
 ]
}

console.log(data.bitcoin[0]) //"-0.47"
console.log(data.bitcoin[1]) //"-0.46"

Since the first syntax allows expressions, the key must not hard-coded:

n=0
data={
 "bitcoin": [
    "-0.47",
    "-0.46",
    "-0.42"
 ],
 "maker": [
    "8.29",
    "8.29",
    "6.89"
 ]
}

console.log(data.bitcoin[n]) //"-0.47"
console.log(data.bitcoin[n+1]) //"-0.46"

And there are a lot of loops, which can help you:

• for - The most commonly used loop. To execute something on all elements of an array:

  data=[1,2,3,"hello","world"]
  
  for(let i=0;i<data.length;i++){
    console.log(i,data[i])
  }

• for of - More simple syntax, but keys are unavailable. Example:

  data=[1,2,3,"hello","world"]
  
  for(let x of data){
    console.log(x)
  }

• array.forEach - Execute a function on all elements of an array:

  data=[1,2,3,"hello","world"]
  
  data.forEach(function(x,i){console.log(i,x)})

And many more similar options!

Answer 2

var obj = {
 "bitcoin": [
    "-0.47",
    "-0.46",
    "-0.42"
 ],
 "maker": [
    "8.29",
    "8.29",
    "6.89"
 ]
}

for (var key in obj) {
  for (var i = 0; i< obj[key].length; i++) {
    console.log(obj[key][i]);
  }
}

i don't know what you want. Tell me.

Answer 3

bitcoin and maker are arrays, so items inside have no key.

const obj = {
 "bitcoin": [
    "-0.47",
    "-0.46",
    "-0.42"
 ],
 "maker": [
    "8.29",
    "8.29",
    "6.89"
 ]
}

To get the values:

var bitcoinItems = obj.bitcoin;
var firstBitcoin = bitcoinItems[0];