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Project Setup

Part of the Logic & Flow section of Coddy's Lua journey — lesson 41 of 54.

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Challenge

Easy

Over the next several lessons, you'll create a program that can store, display, search, and manage contact information.

Create the foundation for your contact list application by setting up the main data structure and displaying the user interface.

Initialize an empty list-style table called contacts that will store all contact information. Then display a welcome message and a menu showing the available commands.

Requirements:

  • Create an empty table named contacts
  • Print the message: Welcome to Contact List Manager!
  • Print a blank line
  • Print the menu header: Available Commands:
  • Print each menu option on a separate line:
    • add - Add a new contact
    • list - Display all contacts
    • search - Search for a contact
    • delete - Delete a contact
    • quit - Exit the program

Expected Output:

Welcome to Contact List Manager!

Available Commands:
add - Add a new contact
list - Display all contacts
search - Search for a contact
delete - Delete a contact
quit - Exit the program

Try it yourself

All lessons in Logic & Flow

1Advanced Table Iteration

Iterating with pairs()Iterating with ipairs()pairs() vs. ipairs()Recap - Character Sheet

4Introduction to Metatables

What is a Metatable?setmetatable & getmetatableThe __index MetamethodThe __newindex MetamethodThe __tostring MetamethodArithmetic Metamethods Part 1Arithmetic Metamethods Part 2Recap - Read-Only Table

7Advanced String Manipulation

string.gsub() for SubstitutionIntro to String Patternsstring.find()string.match()Iterating with string.gmatch()Recap - Log File Parser

2More Table Library Functions

table.concat()table construction & unpack()table.sort()Custom Sorting with FunctionsRecap - High Score Board

5Project: Text Adventure Engine

Project Setup: The RoomLinking RoomsProject lessonPlayer StateProject lessonThe Game LoopProject lessonHandling User InputProject lessonMoving the PlayerProject lessonHandling Invalid MovesProject lessonDisplaying ExitsProject lesson

8Project: Contact List

Project SetupThe Main LoopProject lessonAdding a ContactProject lessonListing All ContactsProject lessonSearching for a ContactProject lessonDeleting a ContactProject lessonHandling Invalid InputProject lesson

3Advanced Function Concepts

Returning Multiple ValuesVariadic Functions (...)Functions First-Class ValuesAnonymous FunctionsWhat is a Closure?Recap - Simple Event Handler

6Error Handling

The error() FunctionProtected Calls with pcall()Recap - Safe Division

9Coroutines for Beginners

What is a Coroutine?coroutine create & resumePausing with coroutine.yield()resume & yieldChecking Coroutine StatusRecap - Number GeneratorRecap - Vector Math