1.4 추출한 amountFor함수 내 매개변수, 변수명을 명확히 변경

Author: YOUNGGEUN OH

index.js

@@ -31,28 +31,28 @@ function statement(invoice, plays) {
 
 
     // 중첩 함수(nested function)로 함수 추출
-    function amountFor(perf, play) {
-        let thisAmount = 0;
+    function amountFor(aPerformance, play) {
+        let result = 0;
 
         switch (play.type) {
             case "tragedy": // 비극
-                thisAmount = 40000;
-                if (perf.audience > 30) {
-                    thisAmount += 1000 * (perf.audience - 30);
+                result = 40000;
+                if (aPerformance.audience > 30) {
+                    result += 1000 * (aPerformance.audience - 30);
                 }
                 break;
             case "comedy": // 희극
-                thisAmount = 30000;
-                if (perf.audience > 20) {
-                    thisAmount += 10000 + 500 * (perf.audience - 20);
+                result = 30000;
+                if (aPerformance.audience > 20) {
+                    result += 10000 + 500 * (aPerformance.audience - 20);
                 }
-                thisAmount += 300 * perf.audience;
+                result += 300 * aPerformance.audience;
                 break;
             default:
                 throw new Error(`알 수 없는 장르 : ${play.type}`);
         }
 
-        return thisAmount;
+        return result;
     }
 }