diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index fdfa139a21c..c6effb658b7 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -292,19 +292,6 @@ namespace ts {
         return true;
     }
 
-    /**
-     * Returns the first element that matches the predicate, or undefined if none
-     * could be found.
-     */
-    export function find<T>(array: T[], predicate: (item: T) => boolean): T {
-        for (let i = 0, len = array.length; i < len; i++) {
-            if (predicate(array[i])) {
-                return array[i];
-            }
-        }
-        return undefined;
-    }
-
     /**
      * Returns the last element of an array if non-empty, undefined otherwise.
      */
diff --git a/src/services/codefixes/codeFixProvider.ts b/src/services/codefixes/codeFixProvider.ts
index 71199af88fa..9c4e7404c95 100644
--- a/src/services/codefixes/codeFixProvider.ts
+++ b/src/services/codefixes/codeFixProvider.ts
@@ -14,7 +14,7 @@ namespace ts {
     }
 
     export namespace codefix {
-        const codeFixes: Map<CodeFix[]> = {};
+        const codeFixes = createMap<CodeFix[]>();
 
         export function registerCodeFix(action: CodeFix) {
             forEach(action.errorCodes, error => {
@@ -29,7 +29,7 @@ namespace ts {
 
         export class CodeFixProvider {
             public static getSupportedErrorCodes() {
-                return getKeys(codeFixes);
+                return Object.keys(codeFixes);
             }
 
             public getFixes(context: CodeFixContext): CodeAction[] {