Add Dict.getUnsafe

Author: Bart Schuurmans

src/Core__Dict.res

@@ -1,6 +1,7 @@
 type t<'a> = Js.Dict.t<'a>
 
 @get_index external get: (t<'a>, string) => option<'a> = ""
+@get_index external getUnsafe: (t<'a>, string) => 'a = ""
 @set_index external set: (t<'a>, string, 'a) => unit = ""
 @val external delete: 'a => unit = "delete"
 

src/Core__Dict.resi

@@ -24,6 +24,24 @@ switch dict->Dict.get("someKey") {
 @get_index
 external get: (t<'a>, string) => option<'a> = ""
 
+/**
+Returns the value at the provided key.
+
+## Examples
+```rescript
+let dict = Dict.fromArray([("someKey", "someValue")])
+
+dict->Dict.getUnsafe("someKey") == "someValue"
+dict->Dict.getUnsafe("otherKey") // Undefined behaviour
+```
+
+## Important
+
+- This is an unsafe operation, it assumes `key` exists in the Dict.
+*/
+@get_index
+external getUnsafe: (t<'a>, string) => 'a = ""
+
 /**
 `set(dictionary, key, value)` sets the value at the provided key to the provided value.