Function firstDefined

firstDefined<T = any>(
    fallback: T,
    first: T | null | undefined,
    ...remaining: (T | null | undefined)[],
): T
Returns the first value in args such that args is not null or undefined.
Type Parameters
- T = any
  The type of data that will be enumerated.
Parameters
- fallback: T
  The fallback value in the case that all values in args are null/undefined.
- first: T | null | undefined
  The first value to check.
- ...remaining: (T | null | undefined)[]
  The remaining values beyond the first to check.
Returns T
The first value if it is not null or undefined. If first is undefined or null, then the first item in remaining such that remaining[i] is not null or undefined is returned. If first and all values of remaining are null or undefined, then fallback is returned.
Example
```
// 'Defined'
const shouldBeDefined = firstDefined('Fallback', null, undefined, 'Defined');
// 'Fallback'
const shouldBeFallback = firstDefined('Fallback', null, undefined);
const shouldAlsoBeFallback = firstDefined('Fallback', undefined);
// 'First'
const shouldBeFirst = firstDefined('Fallback', 'First', null, 'Third');
```
- Defined in packages/helpful-fn/src/first-where/first-where.mts:70