Parsing array inside object with unknown key and unknown values

Question

I have the following JSON (snippet):

"1": {
  "Name": [
    "Person1",
    "Person2",
    "Person3",
    "Person4",
    "Person5"
  ]
}
"4"{
  "Name": [
    "AnotherPerson1",
    "AnotherPerson2",
    "AnotherPerson3",
    "AnotherPerson4",
    "AnotherPerson5"
  ]
}
...

I don't know the key value (it doesn't increase linearly) and I don't know the different values inside "Name" (only that they are inside "Name", are strings, and total 5).

I want to return all first strings under "Name" and their respective root(?) key. So "Person1" & "1"; "AnotherPerson1" & "4", etc.

I've only managed to make it work when I know the key value but it's too long to write.

console.log(data[1]["Name"][1]);

p1100i · Accepted Answer · 2020-08-09 21:01:31Z

1

var keys = Object.keys(data);

keys.forEach(function(key) {
  console.log(data[key].Name[0], 'on root key', key);
});

answered Aug 9, 2020 at 21:01

p1100i

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Comments

charlietfl · Accepted Answer · 2020-08-09 21:08:57Z

0

You can iterate over Object.entries() array to map the data to a more useful structure.

I'm not 100% clear what the structure you are looking for is but I think what you want is something like:

const data={1:{Name:["Person1","Person2","Person3","Person4","Person5"]},4:{Name:["AnotherPerson1","AnotherPerson2","AnotherPerson3","AnotherPerson4","AnotherPerson5"]}};

const res = Object.entries(data).reduce((a,[key,{Name}])=> {
   Name.forEach(name => a.push({name, key}));
   return a;
},[]);

console.log(res)

edited Aug 9, 2020 at 21:08

answered Aug 9, 2020 at 21:03

charlietfl

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