Solving "Roman to Integer" from LeetCode ( Easy ) - Problem solving in JS

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I'm solving this problem in JS
leetcode.com/problems/roman-t...
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[@tatianabowman]

omg, this solution is great! Really helped me understand the problem!

[@georgeyxu]

Awesome solution ! I found out that map.I and map['I'] have the same value, which is 1. Very amazing, and I learned a lot. Thank U :)

[@3MILFOR3VER]

awesome solution

[@neeraj1954]

its amazing..

[@isakawilliam]

i did it differently and got 52mb of memory usage and just faster than 5%😂😂 I feel dumb af, but this is a silky solution. 🔥🔥

[@anilKUMAR-wr2pi]

Thanks man🌹

[@Rowadz]

You're welcome :)

[@shahriarbhuyian850]

GREAT

[@newtypetommy]

I did this without arrow functions and got slower with more memory usage. Is this normal? does using arrow functions use less memory?

[@Rowadz]

Not sure why it's slower, but for memory it could be because arrow functions don't have "arguments" or "this" or "new.target"

[@Rowadz]

Read more here:
developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions
I hope this helps

[@TekkenRoom]

can you please explain this part " res -=map[num] & res+=map[num] "

[@synaxreader9326]

Here is the explaination of " res -=map[num] & res+=map[num] ". The reason is, res is initialized to 0. Using "IV" as an example. Since '1'

[@TekkenRoom]

@@synaxreader9326 much thanks to you sir 🙏

[@kwandamadela7707]

@@synaxreader9326 Hi, I'm new to JS can you please explain what is going on from forEach() and onwards 🙏? Why is 'num' a number and not a property (e.g: 'V:5')??

[@arshadchowdhury5939]

​@@kwandamadela7707 num is not a number here, it's the roman number, type of which is a string actually.

[@kwandamadela7707]

@@arshadchowdhury5939 Thanks a lot mate 🙌

[@abhishektripathi3536]

sequence =
"aaabaaaabaaabaaaabaaaabaaaabaaaaba"
word =
"aaaba"

[@chrismetsios4005]

Yeah don’t think you need .split but nice

[@Spacey.]

You need .split('') to convert the string to a character array