Convert tests, Js.Dict and Js.String to .res syntax (rescript-lang#6349)

* Remove some bspack stuff

* Remove OCaml stuff that won't work in .res

* jscomp/test: .ml -> .res

* Fix doc comments in tests

* Convert Js.Dict and Js.String to .res

* Update artifacts.txt

* Fix doc comments

Author: cknitt

jscomp/others/js_dict.ml

@@ -0,0 +1,124 @@
+/* Copyright (C) 2015-2016 Bloomberg Finance L.P.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * In addition to the permissions granted to you by the LGPL, you may combine
+ * or link a "work that uses the Library" with a publicly distributed version
+ * of this file to produce a combined library or application, then distribute
+ * that combined work under the terms of your choosing, with no requirement
+ * to comply with the obligations normally placed on you by section 4 of the
+ * LGPL version 3 (or the corresponding section of a later version of the LGPL
+ * should you choose to use a later version).
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/*** Provides a simple key-value dictionary abstraction over native JavaScript objects */
+
+/** The dict type */
+type t<'a>
+
+/** The key type, an alias of string */
+type key = string
+
+/**
+  `unsafeGet dict key` returns the value associated with `key` in `dict`
+
+  This function will return an invalid value (`undefined`) if `key` does not exist in `dict`. It
+  will not throw an error.
+*/
+@get_index
+external unsafeGet: (t<'a>, key) => 'a = ""
+let \".!()" = unsafeGet
+
+/** `get dict key` returns the value associated with `key` in `dict` */
+let get = (type u, dict: t<u>, k: key): option<u> =>
+  if %raw(`k in dict`) {
+    Some(\".!()"(dict, k))
+  } else {
+    None
+  }
+
+/** `set dict key value` sets the value of `key` in `dict` to `value` */
+@set_index
+external set: (t<'a>, key, 'a) => unit = ""
+
+/** `keys dict` returns an array of all the keys in `dict` */
+@val
+external keys: t<'a> => array<key> = "Object.keys"
+
+/** `empty ()` creates an empty dictionary */
+@obj
+external empty: unit => t<'a> = ""
+
+let unsafeDeleteKey: (. t<string>, string) => unit = %raw(` function (dict,key){
+      delete dict[key];
+     }
+  `)
+
+@new external unsafeCreate: int => array<'a> = "Array"
+/* external entries : 'a t -> (key * 'a) array = "Object.entries" [@@bs.val] (* ES2017 *) */
+let entries = dict => {
+  let keys = keys(dict)
+  let l = Js_array2.length(keys)
+  let values = unsafeCreate(l)
+  for i in 0 to l - 1 {
+    let key = Js_array2.unsafe_get(keys, i)
+    Js_array2.unsafe_set(values, i, (key, \".!()"(dict, key)))
+  }
+  values
+}
+
+/* external values : 'a t -> 'a array = "Object.values" [@@bs.val] (* ES2017 *) */
+let values = dict => {
+  let keys = keys(dict)
+  let l = Js_array2.length(keys)
+  let values = unsafeCreate(l)
+  for i in 0 to l - 1 {
+    Js_array2.unsafe_set(values, i, \".!()"(dict, Js_array2.unsafe_get(keys, i)))
+  }
+  values
+}
+
+let fromList = entries => {
+  let dict = empty()
+  let rec loop = x =>
+    switch x {
+    | list{} => dict
+    | list{(key, value), ...rest} =>
+      set(dict, key, value)
+      loop(rest)
+    }
+
+  loop(entries)
+}
+
+let fromArray = entries => {
+  let dict = empty()
+  let l = Js_array2.length(entries)
+  for i in 0 to l - 1 {
+    let (key, value) = Js_array2.unsafe_get(entries, i)
+    set(dict, key, value)
+  }
+  dict
+}
+
+let map = (f, source) => {
+  let target = empty()
+  let keys = keys(source)
+  let l = Js_array2.length(keys)
+  for i in 0 to l - 1 {
+    let key = Js_array2.unsafe_get(keys, i)
+    set(target, key, f(. unsafeGet(source, key)))
+  }
+  target
+}