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A newer alternative to custom settings forstoring configuration data is called custom metadata. As with custom settings,custom metadata...

Custom settings can be used for storing app configuration data that is cached instead of storing in the database. This helps in quickly...

Eg: Trigger on a contact to send email when its owner changes. It uses Apex class to handle the logic. trigger ContactOwnerChangeTrigger...

public with sharing class OuterClass { //Static final variable - outer class only public static final Integer MY_INT; ...

A case is entered and submitted on an external web form. It gets created on Salesforce. On Salesforce there should be a mechanism to find...

public with sharing class futureexperiment { private static Boolean futuresent = false; public static void test2() { //entry point for...

DML operation that triggers Apex Trigger Scheduled Apex that executes at the scheduled time Batch Apex method that called regularly...

//Account a = new Account(name='Account14', Type='Prospect'); //Account b = new Account(name='Account15', Type='Prospect'); /* //defining...

An iterator traverses through every item in a collection. Use case - where we need some complex logic to build scope of the batch or for...

Apex offers two ways to perform DML operations: using DML statements or Database class methods. DML statements are more straightforward...

/* //to return a map of all sObject names(Keys) to sObject tokens(values) Map<String, Schema.SObjectType> globalDescribes =...

To invoke Apex classes to run at specific times, first implement the Schedulable interface for the class. Then, schedule an instance of...

It breaks down a huge batch into manageable chunks. Real life use - a data cleansing operation that goes through all Accounts and...

use case = to store the last opportunity to the account trigger oppTrg on Opportunity(after insert){ //to map the parent i.e account to...

Before triggers are used to update or validate record values before they’re saved to the database. Use Case: Every time an account is...

Use case: suppose that you are building a recruiting application and have an object called Job. You want to validate that the recruiter...

use case - everytime a page is requested the datetime variable is updated. Solution: declare the datetime variable as transient. public...

use case: If the opportunity has been changed to 'Closed Won' then check the checkbox. Solution: Trigger.new returns a list, which are...

Eg: trigger trgOp on Opportunity (before delete, before insert, before update, after delete, after insert, after update){ OpTrgHandler...