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//*REQUIREMENT 2*Before a Stock Item is deleted, make sure that the stock on 
	//hand is at 0.  If it is not, Create a case so that someone is alerted.
	
    //checking if the record is deleted
    if(trigger.isdelete) {
     
    for (stock_item__c stockdelete : trigger.old)  //loop through all deleted items
    {
      if (stockdelete.Stock_on_Hand__c < 0) //check if stock on hand is not 0 then create a case to alert
      {

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//*REQUIREMENT 1* Before a Stock Item can be created, check that there is not already
    // a stock item record with a matching name.
    
    //the below creates the new stockitems in a set that 
    //doesn't allow for duplicates. Trigger.new to ensure all new records created
    //for this object get added to this Set
    
    set <string> stockitems = new set <string> ();
    if (trigger.isInsert) {  
    for (stock_item__c stock : trigger.new) {

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trigger StockItemTrigger on Stock_Item__c (before insert, after delete) {

	
	//*DATA SET UP*created sample records using DML via the execute annonymous window
	//stock_item__c stock = new stock_item__c (); 
    //stock.Item_Name__c = 'chocolate';
	//stock.description__c = 'i love chocolate';
    //stock.minimum_stock_level__c = 10;
	//stock.stock_on_hand__c = 10;
	//stock.list_price__c = 50;

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//*DATA SET UP*created sample records using DML via the execute annonymous window
	//stock_item__c stock = new stock_item__c (); 
    //stock.Item_Name__c = 'chocolate';
	//stock.description__c = 'i love chocolate';
    //stock.minimum_stock_level__c = 10;
	//stock.stock_on_hand__c = 10;
	//stock.list_price__c = 50;
    //insert stock;

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//*REQUIREMENT 1* Before a Stock Item can be created, check that there is not already
    // a stock item record with a matching name.
    
    //the below creates the new stockitems in a set that 
    //doesn't allow for duplicates. Trigger.new to ensure all new records created
    //for this object get added to this Set
    
    set <string> stockitems = new set <string> ();
    for (stock_item__c stock : trigger.new) {
        stockitems.add(stock.Item_Name__c);      

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//The first line of our trigger gives the Trigger's name (AccountTrigger), names the object (Account) and lists the trigger_events that will cause the code below to execute
//For example, "before insert" indicates that before an account record (or records) is inserted,  the trigger will be called.
//For more information on trigger syntax: https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_triggers_syntax.htm

trigger AccountTrigger on Account (before insert, before update, before delete, after insert, after update, after delete, after undelete) {
	
	//Each section of code below handles a different event & timing combination.  For now, we are demonstrating a trigger that has all of the logic right here.
	//Later on we'll be looking at other ways of handling Trigger events using handler classes, but for now, we want to keep all the logic in once place as 
	//we're learning.

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public with sharing class WeekFourHomework {
	

	public static void setsReview(){

		//Your assignment: Play with Sets!

		// 1.  Create a set of Strings and add at least 5 entries
		Set <string> SetofAccounts  = new set <string> ();
        SetofAccounts.add ('Canon');

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public class StringArrayTest {
//The Apex class must be called 'StringArrayTest' and be in the public scope. (done)
//The Apex class must have a public static method called 'generateStringArray'. (done)
//The 'generateStringArray' method must return an array (or list) of strings. (done)
    public static list <string> generateStringArray (integer n){
        list<string> thislist = new list<string>();
        for (integer i=0 ; i<10;i++) {
            thislist.add('Test ' + i);
        system.debug(thislist[i]);
        }

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public with sharing class WeekThreeHomework {

	//Let's practice calling different methods by writing our very own methods. You will write and save methods in the space below
	//that call the existing methods you see already written here.  Ready?  Let's Go!


	//Sample: Here is a public method that calls the getfavoriteColorsMethod below and prints the results to our debug log
	public static void printOutFavoriteColorsDemo () {
		List < String > favoriteColors = getFavoriteColors();
		system.debug('Here are the favorite colors: '+ favoriteColors);

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public with sharing class WeekTwoHomework {
	

	public static void homeworkAssignmentMethod () {
		//Read through the set-up below and then complete the code following the prompts.  When you're done, make sure to compile (save) your work
		//Open Execute Anonymous in the Developer Console and execute your code by typing in: WeekTwoHomework.homeworkAssignmentMethod();
		//Read through the debug statements to make sure you're done your work correctly.
		
		//************************************************************************************************************