Q4 Flatten Deeply Nested Object | Adobe Frontend Interview Questions | Javascript Questions

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[shagunpreetsingh]

How can we optimise the complexity of this also since browser has limited memory to execute and this code may fail in case of thousands of nested levels

[jayantsharma]

Hi Vedant, can we solve this question in below mentioned way :

function flattenObj(obj, parentKey=""){
let finalObj = {};
for(let key in obj){
const newKey = parentKey + key;
const value = obj[key];
if(typeof value === 'object') {
let flatVal = flattenObj(obj[key], (newKey + "."));
finalObj = {...finalObj, ...flatVal};
}
else finalObj[newKey] = value;
}
return finalObj;
}

I have doubt for optimization bcz we are creating a new object on each recursive call, but it will garbage collected once the call ends. Please review this.

[varun]

We want polyfill for map, reduce, filter

[devendrapandey]

const delimiter = "_";

function flatten(obj) {
const result = {};
Object.keys(obj).forEach(key => {
const value = obj[key];
if(typeof value === "object") {
const temp = flatten(value);
=> {
= temp[tempKey];
})

} else {
result[key] = value;
}
})
return result;
}

[roidondsouza]

output Im getting as {} ? anyone else getting the same?
function flatenObject(obj, parent){
const finalObj={}
const generateFlatObject = (obj, parent)=>{
for(let key in obj){
const newprent = parent + key ;
const value=obj[key];
if(typeof value === "object"){
generateFlatObject(value, newprent+".")

}

}

}
generateFlatObject(obj, parent)
return finalObj
}
let obj = {
A: "12",
B: 23,
C: {
P: 23,
O: {
L: 56
},
Q: [1, 2]
}
}
console.log(flatenObject(obj, " "))

[muruganpaneerselvam]

teach single language... don't mix up hindi and english... suddenly we can't understand