About Lesson
Q2. You are given an object. Write a function to flatten it, where the term flatten is defined as to get all the keys of nested objects and bring them to the same level.
// # Sample Input:
const obj = {
newObj: {
obj2: {
obj5: {
one: 1,
two: 2
},
},
},
obj3: {
obj4: {
two: 2
},
},
};
// # Sample Output:
/* {
‘newObj.obj2.obj5.one’: 1,
‘newObj.obj2.obj5.two’: 2,
‘obj3.obj4.two’: 2
}*/
Ans:
const flatten = (obj, parentKey=””, result = {})=>{
for(const key in obj){
const newKey = parentKey ? `${parentKey}.${key}` : key;
const currObj = obj[key];
if(typeof currObj === ‘object’ && currObj !== null && !Array.isArray(currObj)){
flatten(currObj, newKey, result);
}else{
result[newKey] = obj[key];
}
}
return result;
}
console.log(flatten(obj));
