Converting Array stored as a String to a List object in JavaString

Question

I have the following list:

nested_list = [
  ["[63]"],
  ["[61]"],
  ["[7]"],
  ["[63]"],
  ["[80, 18]"],
  ["[80, 43, 18, 20]"]
]

Which is a mess I know, but this is the data that I have to deal with at the moment and I need it to be like this:

[63, 61, 7, 63, 80, 18, 80, 43, 18, 20]

So basically converting it into a list of numbers. Is this doable using as minimum loops as possible?

I have used flat() nested_list .flat(2) and ended up with the following result:

[ '[63]', '[61]', '[7]', '[63]', '[80, 18]', '[80, 43, 18, 20]' ]

Also tried reduce + concat following this but since it is a string, it is not working and I'm not sure where to go from here.

Andreas · Accepted Answer · 2021-09-23 13:21:27Z

8

.flatMap() + JSON.parse() can do this quite easily

const nested_list = [
  ["[63]"],
  ["[61]"],
  ["[7]"],
  ["[63]"],
  ["[80, 18]"],
  ["[80, 43, 18, 20]"]
];

const result = nested_list.flatMap(JSON.parse);

console.log(result)

answered Sep 23, 2021 at 13:21

Andreas

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1 Comment

salRad Over a year ago

Thanks a lot! This is amazing! Learning tons here :)

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