update

server/src/JSON.ts

@@ -4,9 +4,7 @@ export type JSONValue =
     | number
     | boolean
     | JSONObject
-    | JSONArray;
-
-export type JSONArray = Array<JSONValue>;
+    | Array<JSONValue>;
 
 export interface JSONObject {
     [x: string]: JSONValue;

server/src/Result.ts

@@ -1,3 +1,4 @@
+const INSERTION_STR = "$err";
 export class StoccaTreError {
     message: string;
     statusCode: number = 500;
@@ -8,10 +9,10 @@ export class StoccaTreError {
     }
 
     qualified(qualification: string): this {
-        const insertionPoint = qualification.indexOf("$err");
+        const insertionPoint = qualification.indexOf(INSERTION_STR);
         this.message = insertionPoint !== -1
-            ? `${qualification.slice(0, insertionPoint)}${this.message}${qualification.slice(insertionPoint + 4)}`
-            : `${qualification}${this.message}`;
+            ? `${ qualification.slice(0, insertionPoint) }${ this.message }${ qualification.slice(insertionPoint + INSERTION_STR.length) }`
+            : `${ qualification }${ this.message }`;
         return this;
     }