Match dictionaries with a syntax something like `{ key => pattern, ... }` where *key* is a constant (e.g. `1` or `"foo"`) or symbol (e.g. `:x`). Every key must exist in the map, and its corresponding value must match the given pattern.
Match dictionaries with a syntax something like
{ key => pattern, ... }where key is a constant (e.g.
1or"foo") or symbol (e.g.:x).Every key must exist in the map, and its corresponding value must match the given pattern.