Apex Loops, The Simple Things

18 Sep

For loop over a map’s keys (KeySet)

For loop over a map’s values

For loop over a list

For loop over a set

Code Snipits for Converting Salesforce Collections

8 Sep

Convert a Map to a List of keys


Convert a Map Values to a List of values


Convert an sObject List to a Map – Example 1 – New map with the List passed into the map’s constructor

Use this method when the map’s key value is the object’s Id. Thanks to this post for explaining the concept: King Koo

Convert an sObject List to a Map – Example 2 – Loop and Add

Use this method when the map’s key must be a field that is not an object’s id. This is useful when you need to find an object with a name instead of an Id value.


Report on Field Changes in Salesforce

26 Nov

Tracking field history in Salesforce allows you to report on the original and new values of a field. This functionality can be very useful when determining who changed a field value and when it happened. This built-in change tracking has some limits:

  • Only the following standard objects allow field history tracking: Accounts, Cases, Contacts, Entitlements, Service contracts, Contract line items, Contracts, Leads, Opportunities, and Solutions
  • Only 20 fields may be tracked per object
  • Not all field types can be tracked

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