JavaScript Interview Question - 18 | Deep flatten an object

[@al8905]

I'm relatively new to js and your videos have helped me a lot so thank you

[@Learnersbucket]

Happy to hear that!

[@nocode659]

U are great sir. I hope to be like you one day.. js god

[@Learnersbucket]

Thank you for your kind words, but I am still an apprentice. You can never master an evolving programming language.

[@SoumyaCode]

You are really putting out great content man , Appericiate your Hardwork and effort 🙏. Please keep publishing great videos .

[@Learnersbucket]

Thank you! Will do!

[@themeniacs7376]

🔥

[@urveshgodhani4542]

const nested = {
A: "12",
B: 23,
C: {
P: 23,
O: {
L: 56
},
Q: [1, 2]
}
};
function isObject(obj) {
return typeof (obj) === "object" && obj !== null && !Array.isArray(obj);
}
function isArray(obj) {
return typeof (obj) === "object" && obj !== null && Array.isArray(obj);
}
function flatten(nested) {
const obj = {};
const nestedKeys = Object.keys(nested);
nestedKeys.map((Element) => {
if (isObject(nested[Element])) {
const returnObj = flatten(nested[Element]);
const returnObjKeys = Object.keys(returnObj);
returnObjKeys.map((element) => {
obj[Element + "." + element] = returnObj[element];
})
}
else if (isArray(nested[Element])) {
for (let i = 0; i < nested[Element].length; i++) {
obj[Element + "." + +i] = nested[Element][i]
}
}
else {
obj[Element] = nested[Element];
}
})
return obj
}
console.log(flatten(nested));
Any suggestions for improvement?

[@Learnersbucket]

Unncessary array check, as arrays are object only in javascript, we can iterate them using the for...in loop.
Also code is very verbose, keep it simple, so that it is easy readable and understandable.