add polyfills for es6 array functions

plugins/node_modules/ace/lib/ace/lib/es6-shim.js

@@ -41,13 +41,13 @@ define(function(require, exports, module) {
     }
     if (!String.prototype.includes) {
         defineProp(String.prototype, "includes", function(str, position) {
-            return this.indexOf(str, position != -1);
+            return this.indexOf(str, position) != -1;
         });
     }
     if (!Object.assign) {
-        Object.assign = function (target) {
+        Object.assign = function(target) {
             if (target === undefined || target === null) {
-                throw new TypeError('Cannot convert undefined or null to object');
+                throw new TypeError("Cannot convert undefined or null to object");
             }
 
             var output = Object(target);
@@ -62,5 +62,60 @@ define(function(require, exports, module) {
             return output;
         };
     }
-
+    if (!Array.prototype.find) {
+        defineProp(Array.prototype, "find", function(predicate) {
+            var len = this.length;
+            var thisArg = arguments[1];
+            for (var k = 0; k < len; k++) {
+                var kValue = this[k];
+                if (predicate.call(thisArg, kValue, k, this)) {
+                    return kValue;
+                }
+            }
+        });
+    }
+    if (!Array.prototype.findIndex) {
+        defineProp(Array.prototype, "findIndex", function(predicate) {
+            var len = this.length;
+            var thisArg = arguments[1];
+            for (var k = 0; k < len; k++) {
+                var kValue = this[k];
+                if (predicate.call(thisArg, kValue, k, this)) {
+                    return k;
+                }
+            }
+        });
+    }
+    if (!Array.prototype.includes) {
+        defineProp(Array.prototype, "includes", function(item, position) {
+            return this.indexOf(item, position) != -1;
+        });
+    }
+    if (!Array.prototype.fill) {
+        defineProp(Array.prototype, "fill", function(value) {
+            var O = this;
+            var len = O.length >>> 0;
+            var start = arguments[1];
+            var relativeStart = start >> 0;
+            var k = relativeStart < 0 ?
+                Math.max(len + relativeStart, 0) :
+                Math.min(relativeStart, len);
+            var end = arguments[2];
+            var relativeEnd = end === undefined ?
+                len : end >> 0;
+            var final = relativeEnd < 0 ?
+                Math.max(len + relativeEnd, 0) :
+                Math.min(relativeEnd, len);
+            while (k < final) {
+                O[k] = value;
+                k++;
+            }
+            return O;
+        });
+    }
+    if (!Array.of) {
+        defineProp(Array, "of", function() {
+            return Array.prototype.slice.call(arguments);
+        });
+    }
 });