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Exercise 11: Transform Object Keys
Problem Statement
Function `transformKeys(obj, fn)` banao jo object ke sabhi keys ko transform kare.
Example: transformKeys({name: "John", age: 30}, k => k.toUpperCase()) => {NAME: "John", AGE: 30}
Sample Output:
transformKeys({name: "John", age: 30}, k => k.toUpperCase()) => {NAME: "John", AGE: 30}
transformKeys({a: 1}, k => `prefix_${k}`) => {prefix_a: 1}Solution
const transformKeys = (obj, fn) => {
return Object.keys(obj).reduce((acc, key) => {
acc[fn(key)] = obj[key];
return acc;
}, {});
};Explanation
Overall Goal:
- Object keys ko transform function se modify karna.
Real world:
- Data transformation: key formatting.
- API mapping: key conversion.