import { e } from "https://deno.land/x/actionify@0.2.0/mod.ts";
const { join } = e;
The value for array can be an array or a string. All values in array are
concatenated into a string. If you provide optionalSeparator, it is inserted
between the concatenated values. Otherwise, the default separator , is used.
Casts values to a string.
Parameters
array: ExpressionContent<string | string[]>
optional
optionalSeparator: ExpressionContent<string>