Get Nested Value

Implement a get function (like Lodash's _.get) that safely retrieves a nested property from an object using a dot-notation path string.

Requirements

• Support dot notation: "a.b.c"
• Support bracket notation for arrays: "a[0].b"
• Return a default value if the path doesn't exist

Example

const obj = { a: { b: [{ c: 42 }] } };
get(obj, 'a.b[0].c');        // 42
get(obj, 'a.x.y', 'default'); // 'default'