Turn nullish (null or undefined) values into the specified value.
```ts import * as L from "flurp/logic";
const f = L.nullishTo(3); f(undefined); // 3 f(null); // 3; f("weasel"); // "weasel"
Turn nullish (null or undefined) values into the specified value.
Example
```ts import * as L from "flurp/logic";
const f = L.nullishTo(3); f(undefined); // 3 f(null); // 3; f("weasel"); // "weasel"