Toolbox => Add snakeToCamel and getKeysWithPrefix

helpers/Toolbox.ts

@@ -42,6 +42,14 @@ class Toolbox {
             getTotalSize: this.getTotalSize.bind(this)
         };
     }
+
+    public snakeToCamel(str: string): string {
+        return str.toLowerCase().replace(/([-_][a-z])/g, (group: string) => group.toUpperCase().replace('-', '').replace('_', ''));
+    }
+
+    public getKeysWithPrefix(obj: object, prefix: string): Array<string> {
+        return Object.keys(obj).filter(key => key.startsWith(prefix));
+    }
 }