From 4d782bc340bd0f20fffda2b61e88b8d3e5a62c04 Mon Sep 17 00:00:00 2001
From: rkshaon <rkshaon.ist@gmail.com>
Date: Thu, 13 Dec 2018 01:11:08 +0600
Subject: [PATCH 1/4] node example: understanding node

---
 index.js     | 19 +++++++++++++++++++
 package.json | 12 ++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 index.js
 create mode 100644 package.json

diff --git a/index.js b/index.js
new file mode 100644
index 0000000..01fa003
--- /dev/null
+++ b/index.js
@@ -0,0 +1,19 @@
+var rect = {
+	perimeter: (x, y) => (2*(x+y)),
+	area: (x, y) => (x*y)
+};
+
+function solveRect(l, b){
+	console.log("Solving for Rectangle with l = " + l + " and b = " + b);
+	if(l<=0 || b<=0){
+		console.log("Rectangle dimensions should be greater than ZERO: l = " + l + ", and b = " + b);
+	} else{
+		console.log("The area of the Rectangle is " + rect.area(l, b));
+		console.log("The perimeter of the Rectangle is " + rect.perimeter(l, b));
+	}
+}
+
+solveRect(2, 4);
+solveRect(3, 5);
+solveRect(0, 5);
+solveRect(-3, 5);
\ No newline at end of file
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..1f981b2
--- /dev/null
+++ b/package.json
@@ -0,0 +1,12 @@
+{
+  "name": "node-example",
+  "version": "1.1.0",
+  "description": "Simple Node Example",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node index"
+  },
+  "author": "Rezaul Karim Shaon",
+  "license": "ISC"
+}

From 950e9f029980675a56f9b5521867852f2d413eb8 Mon Sep 17 00:00:00 2001
From: rkshaon <rkshaon.ist@gmail.com>
Date: Thu, 13 Dec 2018 01:14:36 +0600
Subject: [PATCH 2/4] rectangle module

---
 index.js     | 5 +----
 rectangle.js | 2 ++
 2 files changed, 3 insertions(+), 4 deletions(-)
 create mode 100644 rectangle.js

diff --git a/index.js b/index.js
index 01fa003..3c06dd0 100644
--- a/index.js
+++ b/index.js
@@ -1,7 +1,4 @@
-var rect = {
-	perimeter: (x, y) => (2*(x+y)),
-	area: (x, y) => (x*y)
-};
+var rect = require('./rectangle');
 
 function solveRect(l, b){
 	console.log("Solving for Rectangle with l = " + l + " and b = " + b);
diff --git a/rectangle.js b/rectangle.js
new file mode 100644
index 0000000..c8a16ce
--- /dev/null
+++ b/rectangle.js
@@ -0,0 +1,2 @@
+exports.perimeter = (x, y) => (2*(x+y));
+exports.area = (x, y) => (x*y);
\ No newline at end of file

From fca9710724d4d03470e54d54f8e246e131e12c42 Mon Sep 17 00:00:00 2001
From: rkshaon <rkshaon.ist@gmail.com>
Date: Sun, 16 Dec 2018 01:07:21 +0600
Subject: [PATCH 3/4] node project created

---
 index.js     | 18 ++++++++++++------
 rectangle.js | 18 ++++++++++++++++--
 2 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/index.js b/index.js
index 3c06dd0..15f575a 100644
--- a/index.js
+++ b/index.js
@@ -2,12 +2,18 @@ var rect = require('./rectangle');
 
 function solveRect(l, b){
 	console.log("Solving for Rectangle with l = " + l + " and b = " + b);
-	if(l<=0 || b<=0){
-		console.log("Rectangle dimensions should be greater than ZERO: l = " + l + ", and b = " + b);
-	} else{
-		console.log("The area of the Rectangle is " + rect.area(l, b));
-		console.log("The perimeter of the Rectangle is " + rect.perimeter(l, b));
-	}
+	rect(l, b, (err, rectangle)=>{
+		if(err){
+			console.log("ERROR: " + err.message);
+		}
+		else{
+			console.log("The area of rectangle of dimensions l = " + l 
+				+ " and b = " + b + " is " + rectangle.area());
+			console.log("The perimeter of rectangle of dimensions l = " + l 
+				+ " and b = " + b + " is " + rectangle.perimeter());
+		}
+	});
+	console.log("This statement is after the call to recall()");
 }
 
 solveRect(2, 4);
diff --git a/rectangle.js b/rectangle.js
index c8a16ce..975bb83 100644
--- a/rectangle.js
+++ b/rectangle.js
@@ -1,2 +1,16 @@
-exports.perimeter = (x, y) => (2*(x+y));
-exports.area = (x, y) => (x*y);
\ No newline at end of file
+module.exports = (x, y, callback) => {
+	if(x<=0 || y<=0){
+		setTimeout(() => 
+			callback(new Error("Rectangle dimensions should be greater than ZERO: l = " + x + ", and b = " + y), 
+				null),
+			2000);
+	} else{
+		setTimeout(() => 
+			callback(null, 
+			{
+				perimeter: () => (2*(x+y)),
+				area: () => (x*y)
+			}),
+			2000);
+	}
+}
\ No newline at end of file

From 6ec65c1e2f0e4c903cd7360882255c388a8225ea Mon Sep 17 00:00:00 2001
From: Rezaul Karim Shaon <rkshaon.ist@gmail.com>
Date: Sun, 16 Dec 2018 01:09:25 +0600
Subject: [PATCH 4/4] Create README.md

---
 README.md | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 README.md

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..a967f90
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+# node-practice