Making Callout from Apex triggers
90191
How can I edit this trigger to only fire once?
136800
DML statement cannot operate on Trigger.new or Trigger.old
156635
Does addError() work outside of triggers?
1393
When can we use Trigger Context Variables?
66677
Registering Class methods as hook callbacks
7606
How do I unit test code that includes a callout?
157547
Database events but not triggers
72216
Passing parameter from lightning JS controller to apex class
140004
scenario for recursive trigger
125292
how to pass a non static-member function as a callback?
145312
Triggering actions when a variable is set
150313
How to dispatch events in C#
32065
Attempt to de-reference a null object: Trigger
108027
Callback functions in Java
104251
Anyway to create a SQL Server DDL trigger for "SELECT" statements?
36589
Is there an Apex code formatting standard?
110068
How can I Have a WPF EventTrigger on a View trigger when the underlying Viewmodel dictates it should?