Implement a function useDefault(value, defaultValue) that returns the given value unless it is null or undefined, in which case it returns defaultValue.

The function should:

• Accept any value and a default.
• Return the default only if the value is nullish (null or undefined).

Examples

useDefault(5, 10);        // 5
useDefault(null, 10);     // 10
useDefault(undefined, 42); // 42
useDefault("Hello", "Hi"); // "Hello"