Function assertNotNil

assertNotNil<T, E = Error>(
    value: T | null | undefined,
    message?: string,
    shouldThrow?: boolean,
): Result<NonNullable<T>, E>
Asserts that a value is not null or undefined, returning the value if valid.
Type Parameters
- T
  The type of the value
- E = Error
  The type of the error (defaults to Error)
Parameters
- value: T | null | undefined
  The value to check for null/undefined
- message: string = 'Expected value to be non-null'
  Custom error message
- shouldThrow: boolean = true
  Whether to throw the error instead of returning a Result (defaults to true)
Returns Result<NonNullable<T>, E>
A Result containing the value if not null/undefined, or an error if it is
Throws
If shouldThrow is true and value is null/undefined
Example
```
const nameCheck = assertNotNil(user.name)
if (!nameCheck.ok) return nameCheck
const name = nameCheck.value // TypeScript knows this is not null
```
- Defined in index.ts:343