Provide Array.fill in common stdlib

KT-32359

libraries/stdlib/js-v1/src/js/polyfills.js

@@ -249,6 +249,49 @@ if (typeof ArrayBuffer.isView === "undefined") {
     };
 }
 
+if (typeof Array.prototype.fill === "undefined") {
+    // Polyfill from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/fill#Polyfill
+    Array.prototype.fill = function() {
+      // Steps 1-2.
+      if (this == null) {
+        throw new TypeError('this is null or not defined');
+      }
+
+      var O = Object(this);
+
+      // Steps 3-5.
+      var len = O.length >>> 0;
+
+      // Steps 6-7.
+      var start = arguments[1];
+      var relativeStart = start >> 0;
+
+      // Step 8.
+      var k = relativeStart < 0 ?
+        Math.max(len + relativeStart, 0) :
+        Math.min(relativeStart, len);
+
+      // Steps 9-10.
+      var end = arguments[2];
+      var relativeEnd = end === undefined ?
+        len : end >> 0;
+
+      // Step 11.
+      var final = relativeEnd < 0 ?
+        Math.max(len + relativeEnd, 0) :
+        Math.min(relativeEnd, len);
+
+      // Step 12.
+      while (k < final) {
+        O[k] = value;
+        k++;
+      }
+
+      // Step 13.
+      return O;
+    };
+}
+
 (function() {
     function normalizeOffset(offset, length) {
         if (offset < 0) return Math.max(0, offset + length);
@@ -266,6 +309,9 @@ if (typeof ArrayBuffer.isView === "undefined") {
     var arrays = [Int8Array, Int16Array, Uint16Array, Int32Array, Float32Array, Float64Array];
     for (var i = 0; i < arrays.length; ++i) {
         var TypedArray = arrays[i];
+        if (typeof TypedArray.prototype.fill === "undefined") {
+            TypedArray.prototype.fill = Array.prototype.fill;
+        }
         if (typeof TypedArray.prototype.slice === "undefined") {
             Object.defineProperty(TypedArray.prototype, 'slice', {
                 value: typedArraySlice