Solving LinkedIn Frontend Interview Question | Tuple | Arrays of Array | JavaScript

[@JigyasaUpadhyay-l9s]

great explanation, keep up the consistency !

[@DevtoolsTech]

Thanks! ♥️

[@DhruvDhar-r3l]

i was under the impression that `multiply()` had to be added on the prototype of `tuple()`'s result only..... function multiply(position) { let res = this[0][position-1] for(let i=1; i

[@sujalgupta6100]

Hi Yomesh, is there any video of yours for guiding for prep for interview like from JS Topics to cover + What concepts/kind of questions one must prepare as there are so many of them. Some folks keep posting huge list of JS concepts + Output based questions + Polyfill based questions + Any component implementation like Chip or OTP form etc. What to prepare form all of them ? Or maybe how much, it feels way too much.

[@DevtoolsTech]

Hey, I don't have curated list. This is too big so any list will become big eventually. I will try to create something already it ajd share soon!

[@DhruvDhar-r3l]

i was under the impression that multiply had to be added to the prototype of the returned array only and not on the entire Array.prototype function tuple(input) { const outputArr = [] let stack = [] for(const ch of input) { if(ch === '(' || ch === ',' || ch === ' ') continue else if(ch === ')') { outputArr.push(stack) stack = [] } else { stack.push(+ch) } } //ADD multiply to the prototype of the returned array outputArr.multiply = multiply return outputArr }

[@DevtoolsTech]

It works both ways. You can add it to tuple too. There are edge cases that you need to take if you add it to tuple.

[@sourabhrajwade1061]

Nice explanation. I did it by using transversing the tuple array. I have one question though. Why you added multiple in Array prototype ? Shouldn't it be tuple's property?

[@DevtoolsTech]

Depends upon the interviewer what they want to test. Both works. I added on tuple because of convenience as we dont need to take care of a lot of edge cases in thatcase.

[@AnkitGupta-lr1qq]

Great explanation. Wondering if it'd be better to throw OR return something like NaN instead of 0 inside the multiple method when the array length is 0. 0 might be a valid return value as well and doesn't distinguish enough from an edge case (like the empty array)

[@DevtoolsTech]

Valid point. This is also a discussion point with interview about what is the expected behaviour. I agree that 0 is a valid output. However, we need to make a decision that should we break the application by throwing an error or return 0 that shows like a default output as for user if the application breaks then that is a really bad experience.

[@virendrapratap2417]

Correct me if i am wrong. line no 22: can be replaced with current.hasOwnProperty(position) instead of borrowing has own property using call?

[@DevtoolsTech]

Yes, it can be used. However, it id advised not to. Check the following please eslint.org/docs/latest/rules/no-prototype-builtins

[@jithendra16]

Can you please make a video on how to write regex expressions Also any explanation on why did you use prototype to find whether that index is present? It will be helpful

[@DevtoolsTech]

Thanks for the suggestions! I will include it in future videos!