Convert Roman Numerals using Object?

JavaScript
1

I was looking into a possible option of solving the challenge by using a JSON Structure for mapping the roman numerals

 var romanNumerals = {
   1: 'I',
   4: 'IV',
   5: 'V',
   9: 'IX',
   10: 'X',
   40: 'XL',
   50: 'L',
   90: 'XC',
   100: 'C',
   400: 'CD',
   500: 'D',
   900: 'CM',
   1000: 'M'
 };

but I am not sure how can I go about this?

Does it make sense to use a JSON as an mapping entity here?

2

this isn’t really JSON. This is a javascript object.
And yes, of course you can use an object to map the values to the numerals.

ps. for this to be called JSON you would not have a variable in front of the object.

3

I was thinking of using Object.keys(romanNumerals) to extract the keys and then compare them with the input number.

P.S. sorry for the mashup between Object and JSON.

4

sure that would work but keep in mind that the keys will be strings , not numbers.
A nested array would be better if you wanted to do numerical comparisons.

here’s what keys gives if you apply it to the object