whiteboard

Linq/Linq.cs

@@ -1,12 +1,31 @@
 using System;
+using System.Linq;
 
 namespace Linq
 {
     class Program
     {
         static void Main(string[] args)
         {
-            Console.WriteLine("Hello World!");
+            var source = new int[] { 1, 2, 3 };
+
+            var results =
+            from i in source
+            where isEven(i)
+            select Square(i);
+
+            int total = source.Where(isEven).Select(Square).Sum();
+            // var total = results.Sum();
+        }
+
+        public static bool isEven(int i)
+        {
+            return i % 2 == 0;
+        }
+
+        public static int Square(int value)
+        {
+            return value * value;
         }
     }
 }

LinqProject/.vscode/launch.json

@@ -0,0 +1,26 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": ".NET Core Launch (console)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            "program": "${workspaceFolder}/bin/Debug/netcoreapp2.2/LinqProject.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            "console": "integratedTerminal",
+            "stopAtEntry": false,
+            "internalConsoleOptions": "openOnSessionStart"
+        },
+        {
+            "name": ".NET Core Attach",
+            "type": "coreclr",
+            "request": "attach",
+            "processId": "${command:pickProcess}"
+        }
+    ]
+}

LinqProject/.vscode/tasks.json

@@ -0,0 +1,15 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/LinqProject.csproj"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

LinqProject/LinqProject.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.2</TargetFramework>
+  </PropertyGroup>
+
+</Project>

LinqProject/Program.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace LinqProject
+{
+    public class Program
+    {
+        public static void Main()
+        {
+            List<Student> students = new List<Student>();
+
+            students.Add(new Student("Chris", "123-456-7891", "123 Delany", -2990));
+            students.Add(new Student("Kevin", "512-222-2222", "435 Carolyn", -2500));
+            students.Add(new Student("Victoria", "512-827-8498", "701 Brazos St", 0));
+            students.Add(new Student("Luke", "555-555-5555", "451 Brody Ln", -500));
+
+            //your code here
+
+            List<Student> results = students.FindAll(x => x.Balance < 0);
+
+            foreach (var item in results)
+            {
+                Console.WriteLine(item.Name + " still owes " + item.Balance * -1 + " they can be reached at " + item.Phone + ".");
+            }
+        }
+
+    }
+
+    public class Student
+    {
+        public string Name { get; set; }
+        public string Phone { get; set; }
+        public string Address { get; set; }
+        public int Balance { get; set; }
+
+        public Student(string name, string phone, string address, int balance)
+        {
+            Name = name;
+            Phone = phone;
+            Address = address;
+            Balance = balance;
+        }
+    }
+}
+