sfhero
Join communityNewsletter
Work in progress. sfhero is under active development—content, layout, and behavior may change often. Thanks for being an early visitor.
Join our free community — be an early adopter.

Learn Apex the practical way

Hands-on lessons with interactive examples and short, readable code — so you can build real Salesforce solutions with confidence.

Apex lessons

Access modifiers
private through global — short rules, full class examples, and a live “who can see” grid.
Open lesson
Collections
List, Set, Map — read Apex-shaped snippets, then play with the sandbox.
Open lesson
SOQL basics
Build a SELECT … FROM … WHERE … LIMIT query — watch the string and the binding pattern.
Open lesson
Trigger context
Insert, update, delete — see which Trigger.new / old / maps exist for each event.
Open lesson
Exceptions & nulls
Walk try/catch/finally paths and compare null checks vs String.isBlank for real data.
Open lesson
Sharing in Apex
with / without / inherited sharing — mini org simulator, live class shape, scenario cards.
Open lesson
Permission sets
Stack profiles + sets on a toy user — see CRUD merge, field-level badges, myth cards.
Open lesson
Apex best practices
Governor toy bars, SOQL/DML flip code, tap-the-safe-snippet quiz, habit checklist.
Open lesson
Sharing rules
OWD + peer rule on/off — see when Bob can see Alice’s Account (toy model).
Open lesson
OWD
Organization-wide defaults — Private vs Public Read vs Read/Write baselines.
Open lesson
Apex managed sharing
Toggle a simulated AccountShare — see Apex creating share rows in code.
Open lesson
Order of execution
Step through triggers, validation, automation — simplified pipeline.
Open lesson
Variables & data types
Integer, Decimal, String, Boolean, Id, Date — tap each for notes and snippets.
Open lesson
DML operations
insert / update / delete / upsert / undelete — flip examples, match op to story.
Open lesson
Bulkification
Slider batch size, naive vs bulkified — watch SOQL/DML counts move.
Open lesson
Governor limits
Toy pressure dial filling SOQL / DML / CPU / heap bars — mitigations list.
Open lesson
Static vs instance
Tap to increment — instance vs static counters side by side.
Open lesson
Constructors
Overload picks — which new Service(...) maps to which constructor.
Open lesson
Polymorphism
Dog / Cat / Bird — runtime type picks speak(); virtual/override snippet.
Open lesson
Context variables
isInsert, isUpdate, isBefore, size, operationType — tap event; table updates live.
Open lesson
Trigger.new vs Trigger.old
Sliders for old vs new Amount — “changed?” panel flips when they differ.
Open lesson
Recursion prevention
Toggle static guard — simulate save; counter explodes or stays controlled.
Open lesson
Trigger order of execution
Shuffle trigger names — reveal alphabetical run order (same object).
Open lesson
Future methods
Sync vs @future box — fire async (toy) and see the separate transaction idea.
Open lesson
Queueable Apex
enqueueJob — queued → done animation; minimal Queueable snippet.
Open lesson
Batch Apex
Slide total rows + batch size — watch execute() count update.
Open lesson
Scheduled Apex
Presets (hourly / daily / weekly) — cron string and plain English.
Open lesson
Chaining Queueables
Next step — Job A/B lights up as you walk the chain (toy).
Open lesson

Stay updated

New lessons and Apex tips from sfhero—no spam.

Subscribe to newsletter

We respect your privacy. Unsubscribe at any time.