Add Array.fromIterator for convenience

Author: bloodyowl

src/Core__Array.res

@@ -3,6 +3,7 @@
 external getUnsafe: (array<'a>, int) => 'a = "%array_unsafe_get"
 external setUnsafe: (array<'a>, int, 'a) => unit = "%array_unsafe_set"
 
+@val external fromIterator: Core__Iterator.t<'a> => array<'a> = "Array.from"
 @val external fromArrayLike: Js.Array2.array_like<'a> => array<'a> = "Array.from"
 @val
 external fromArrayLikeWithMap: (Js.Array2.array_like<'a>, 'a => 'b) => array<'b> = "Array.from"

src/Core__Array.resi

@@ -1,3 +1,6 @@
+// TODO: Docs
+@val external fromIterator: Core__Iterator.t<'a> => array<'a> = "Array.from"
+
 // TODO: Docs
 @val external fromArrayLike: Js.Array2.array_like<'a> => array<'a> = "Array.from"
 

test/ArrayTests.mjs

@@ -401,6 +401,28 @@ Test.run([
 
           })), eq, undefined);
 
+Test.run([
+      [
+        "ArrayTests.res",
+        103,
+        13,
+        27
+      ],
+      "fromIterator"
+    ], Array.from(new Map([
+                [
+                  1,
+                  3
+                ],
+                [
+                  2,
+                  4
+                ]
+              ]).values()), eq, [
+      3,
+      4
+    ]);
+
 export {
   eq ,
 }

test/ArrayTests.res

@@ -98,3 +98,10 @@ Test.run(
   eq,
   None,
 )
+
+Test.run(
+  __POS_OF__("fromIterator"),
+  Array.fromIterator(Map.fromArray([(1, 3), (2, 4)])->Map.values),
+  eq,
+  [3, 4],
+)