What is Map Class in Apex Salesforce?

Hi

A map is a search table that you build from scratch. You choose all the possible search terms, and for each one you add a search result. It’s like building your very own Google search!

Building and using map goes like this:

Choose a data type for the search terms and another for the search results of your map.
– Search terms are usually Strings or IDs.
– Search results are usually sObjects (like an Account, Opportunity, or Contact).
Add each search term and search result to your map as a pair.
“Search” your map with any search term and the search result is returned to you!

// Step 1: The search term (email) data type will be a string
// The search result (name) data type will also be a string
Map<String, String> friendMap = new Map<String, String>();
// Step 2: Add our friends as a search term/result pair
friendMap.put('[email protected]', 'David Liu');
friendMap.put('[email protected]', 'Taylor Swift');
friendMap.put('[email protected]', 'Shakira');
friendMap.put('[email protected]', 'Marissa Mayer');
// Step 3: Search our map using the get() function
String biggestFan = friendMap.get('[email protected]');
System.assertEquals('Taylor Swift', biggestFan); // TRUE

• This reply was modified 5 years, 2 months ago by  Saddam.