week2.md

Week 2: Apex Challenges

In the week 2 challenges, we'll tie together our general knowledge of collections like arrays and Apex lists with specifics of developing for the Salesforce platform, such as Trigger delegation and handling.

Remember, make use of the zs50 scaf <psetName> command to help you get started!

loopy

Many languages have an operator for the arithmetic Modulus operation. Apex? Not so much.

But that doesn't mean we can't implement it! For this challenge, you'll create a public class Loopy with a method modulo that...

1. accepts as arguments two Integers (name them a and b, for simplicity)
2. using a loop, recursive function, or otherwise, return the modulo of a divided by b (e.g. modulo(412, 17) returns 4)

triggerHappy

Nowwwww we're getting somewhere. In this challenge, create a class LeadDomain that acts as a trigger handler for Lead records.

Right now we'll pass on writing the trigger itself. But, if you decided to, it would look like this:

trigger LeadTrigger on Lead (before insert){
    LeadDomain ld = new LeadDomain(Trigger.new); 
    ld.doBeforeInsert();
}

To pass this challenge, your LeadDomain class will need to:

1. Implement a constructor that...

   • Takes a List as an argument
   • Sets the 'leads' instance variable to the list passed into the constructor

2. Implement a method doBeforeInsert() that...

   • Loops through each Lead in 'leads' and, for each
     • Checks if the 'Company' field is blank and, if so, set the field to the Lead's firstName + ' ' + lastName
     • For this challenge, a blank field is considered one that is not just null, but an empty String.
     • (Hint) Check out the String class in the apex developer guide.
     • Example - A Lead with firstName='John' and lastName='Smith', and a blank company field value, should have the company field set to 'John Smith'.
   • Does not return a value (e.g. void)

Happy Apex-ing! Yep, it's a word, now.