From 8e7037a2c3f94ea30bf6d1e4e29e73e440833b49 Mon Sep 17 00:00:00 2001
From: mukeunzi <eunji057@gmail.com>
Date: Mon, 8 Apr 2019 21:27:08 +0900
Subject: [PATCH 1/2] step2-1 mission clear

---
 README.md |  2 +-
 area.js   | 41 +++++++++++++++++++++++++++++++++++++++++
 main.js   | 11 +++++++++++
 3 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 area.js
 create mode 100644 main.js

diff --git a/README.md b/README.md
index 52b046b..a65c481 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,2 @@
 # polygon
-레벨2
+레벨2
\ No newline at end of file
diff --git a/area.js b/area.js
new file mode 100644
index 0000000..6965d92
--- /dev/null
+++ b/area.js
@@ -0,0 +1,41 @@
+const PIE = Math.PI;
+
+module.exports.circle = function(r){
+    checkParamCount(r);
+    checkParamType(r);
+    return Math.pow(r, 2) * PIE;
+}
+
+module.exports.square = function(a, b){
+    checkParamCount(a, b);
+    checkParamType(a, b);
+    return a * b;
+}
+
+module.exports.trapezoid = function(a, b, h){
+    checkParamCount(a, b, h);
+    checkParamType(a, b, h);
+    return (a + b) * h / 2;
+}
+
+module.exports.cylindrical = function(r, h){
+    checkParamCount(r, h);
+    checkParamType(r, h);
+    return (this.circle(r) * 2) + (r * 2 * PIE * h);
+}
+
+function checkParamType(){
+    for (let i=0; i<arguments.length; i++) {
+        if(typeof arguments[i] !== "number") {
+            throw Error("숫자를 입력하세요.");
+        }
+    }
+}
+
+function checkParamCount(){
+    for (let i=0; i<arguments.length; i++){
+        if(typeof arguments[i] === "undefined"){
+            throw Error("모든 인자를 입력하세요.");
+        }
+    }
+}
\ No newline at end of file
diff --git a/main.js b/main.js
new file mode 100644
index 0000000..248fda5
--- /dev/null
+++ b/main.js
@@ -0,0 +1,11 @@
+const area = require("./area");
+
+console.log(area.circle(3));
+console.log(area.square(4, 5));
+console.log(area.trapezoid(5, 3, 2));
+console.log(area.cylindrical(2, 5));
+
+// console.log(area.circle('3'));
+// console.log(area.square('아', 5));
+// console.log(area.trapezoid(5, 3, '3'));
+// console.log(area.cylindrical(2));
\ No newline at end of file

From 77217d5234c84727455a7d5484321e36c5f94651 Mon Sep 17 00:00:00 2001
From: mukeunzi <eunji057@gmail.com>
Date: Tue, 9 Apr 2019 11:36:05 +0900
Subject: [PATCH 2/2] modified facade pattern

---
 area.js | 41 +++++++++++++++++++++--------------------
 main.js |  2 +-
 2 files changed, 22 insertions(+), 21 deletions(-)

diff --git a/area.js b/area.js
index 6965d92..c68c87e 100644
--- a/area.js
+++ b/area.js
@@ -1,41 +1,42 @@
 const PIE = Math.PI;
 
-module.exports.circle = function(r){
-    checkParamCount(r);
-    checkParamType(r);
+module.exports.circle = function(r = -1){
+    checkParameter(r);
     return Math.pow(r, 2) * PIE;
 }
 
-module.exports.square = function(a, b){
-    checkParamCount(a, b);
-    checkParamType(a, b);
+module.exports.square = function(a = -1, b = -1){
+    checkParameter(a, b);
     return a * b;
 }
 
-module.exports.trapezoid = function(a, b, h){
-    checkParamCount(a, b, h);
-    checkParamType(a, b, h);
+module.exports.trapezoid = function(a = -1, b = -1, h = -1){
+    checkParameter(a, b, h);
     return (a + b) * h / 2;
 }
 
-module.exports.cylindrical = function(r, h){
-    checkParamCount(r, h);
-    checkParamType(r, h);
+module.exports.cylindrical = function(r = -1, h = -1){
+    checkParameter(r, h);
     return (this.circle(r) * 2) + (r * 2 * PIE * h);
 }
 
-function checkParamType(){
-    for (let i=0; i<arguments.length; i++) {
-        if(typeof arguments[i] !== "number") {
-            throw Error("숫자를 입력하세요.");
+function checkParamCount(rest){
+    for (let i=0; i<rest.length; i++){
+        if(rest[i] === -1){
+            throw Error("모든 인자를 입력하세요.");
         }
     }
 }
 
-function checkParamCount(){
-    for (let i=0; i<arguments.length; i++){
-        if(typeof arguments[i] === "undefined"){
-            throw Error("모든 인자를 입력하세요.");
+function checkParamType(rest){
+    for (let i=0; i<rest.length; i++) {
+        if(typeof rest[i] !== "number") {
+            throw Error("숫자를 입력하세요.");
         }
     }
+}
+
+function checkParameter(...rest){
+    checkParamCount(rest);
+    checkParamType(rest);
 }
\ No newline at end of file
diff --git a/main.js b/main.js
index 248fda5..1140c96 100644
--- a/main.js
+++ b/main.js
@@ -1,7 +1,7 @@
 const area = require("./area");
 
 console.log(area.circle(3));
-console.log(area.square(4, 5));
+console.log(area.square(5, 6));
 console.log(area.trapezoid(5, 3, 2));
 console.log(area.cylindrical(2, 5));