Q3 Flatten an Array | Flipkart Frontend Interview Questions | Javascript Questions for Interviews

[@ayushkushwaha171]

awesome, one more variation could be where you can give level of depth to which flat occurs to your function like flat(arr,2)

[@saumyaranjannayak2101]

If someone finds reduce complex, try the below simple for loop soln: function flatten(arr, anss){ let ans = [] for(let i = 0; i

[@nityamgosain]

const flat =(arr)=> arr.toString().split(',').map((el)=>Number(el))

[@akshaykumar5012]

This will not work for all cases

[@yzo954]

this will not work if you run this function for [ 'hello, world',['something,test'] ] => since you are splitting the converted arr string using comma (,) resulted output will be ['hello', 'world','something','test']

[@PIYUSH-lz1zq]

@@akshaykumar5012 while pushing the actual output to res after that we should empty the curr array so taht fresh val dont append with previous values ...... what we used to do in c++/java !!! please tell ....

[@PIYUSH-lz1zq]

@@yzo954 while pushing the actual output to res after that we should empty the curr array so taht fresh val dont append with previous values ...... what we used to do in c++/java !!! please tell ....

[@sachinmalik5837]

Hi, Very nice explanation for the flow. I am commenting a solution without Reduce so if someone doesn't fully understand Reduce can still do this one of the most famous frontend question const flattenArray = (intialArray) => { var result = []; for(let i=0;i

[@PIYUSH-lz1zq]

Bro , when making recursive call to nth level ... why you didn't write base conditions to come back from last level of nesting ?

[@PIYUSH-lz1zq]

while pushing the actual output to res after that we should empty the curr array so taht fresh val dont append with previous values ...... what we used to do in c++/java !!! please tell ....

[@NikhilSharma-r1v]

function flattenArr(arr) { const result = []; arr.forEach((element) => { if (Array.isArray(element)) { const nestedFlatArr = flattenArr(element); result.push(...nestedFlatArr); } else { result.push(element); } }); return result; }

[@amansaxena4446]

const res=[] function flat(arr){ for(let i=0;i

[@PIYUSH-lz1zq]

Bro , when making recursive call to nth level ... why you didn't write base conditions to come back from last level of nesting ?

[@amansaxena4446]

@@PIYUSH-lz1zq else part will act as base cond, keeps on pushing and moving forward to next element

[@PIYUSH-lz1zq]

@@amansaxena4446 while pushing the actual output to res after that we should empty the curr array so taht fresh val dont append with previous values ...... what we used to do in c++/java !!! please tell ....

[@pranavJha93]

let myArr = []; function flat(element){ for(const el of element){ if(typeof el ==='object'){ flat(el); } else myArr.push(el); } } flat(arr)

[@venkateshpachigulla]

We can achieve this using Array flat method like console.log(Array.flat(arr, Infinity)). We can consider your code as a polyfill for Array flat method.

[@js_cafe]

Yes, but refrain from using flat method in interview, as the interviewer will not be seeking you to use in built helper functions.

[@PIYUSH-lz1zq]

while pushing the actual output to res after that we should empty the curr array so taht fresh val dont append with previous values ...... what we used to do in c++/java !!! please tell ....