I have received an object and an array. My task is to filter the object so that it only contains nodes where either the key or the value matches with the keys provided in the array. For example:
Array containing keys -
['student1', 'STU', 'LMN', 'student4']INPUT
{
student1: {
name: 'ABC',
roll: 17,
},
student2: {
name: 'LMN',
roll: 16
},
student3: {
name: 'MNO',
roll: 15
},
student4: {
name: 'PQR',
roll: 16
}
}
OUTPUT
{
student1: {
name: 'ABC',
roll: 17,
},
student2: {
name: 'LMN',
roll: 16
},
student4: {
name: 'PQR',
roll: 16
}
}
INPUT
{
student1: {
name: 'ABC',
roll: 17,
friends: {
student5: {},
student6: {}
}
},
student2: {
name: 'LMN',
roll: 16
},
student3: {
name: 'MNO',
roll: 15,
friends: {
student7: {
name: 'STU'
}
}
},
student4: {
name: 'PQR',
roll: 16
}
}
OUTPUT:
{
student1: {
name: 'ABC',
roll: 17,
friends: {
student5: {},
student6: {}
}
},
student2: {
name: 'LMN',
roll: 16
},
student3: {
name: 'MNO',
roll: 15,
friends: {
student7: {
name: 'STU'
}
}
},
student4: {
name: 'PQR',
roll: 16
}
}
INPUT
{
student5: {
name: 'EFG',
roll: 10,
friends: {
student1: {},
student2: {}
}
}
}
OUTPUT:
{
student5: {
name: 'EFG',
roll: 10,
friends: {
student1: {}
}
}
}
Explanation :
The keys given are
'student1', 'student4', 'STU' and 'LMN'NOTE: The object can be deeply nested as well.
MY APPROACH
I attempted to parse the object and filter out entries based on their presence, but I am not getting the correct results,
const containsKey = (obj, arr = []) => {
return (
obj &&
typeof obj === "object" &&
(arr.some((key) => key in obj) ||
arr.indexOf(obj[targetKey]) > -1 ||
Object.values(obj).filter((obj) => {
return containsKey(obj, arr);
}))
);
};
Object.fromEntries(
Object.entries(obj).filter(([k, v]) =>
containsKey({ [k]: v }, arr)
)
);
Any assistance would be greatly appreciated. Thank you :)