Apex Developer Guide

Apex Developer Guide
Getting Started with Apex
Writing Apex
Running Apex
Invoking Apex
Apex Transactions and Governor Limits
Using Salesforce Features with Apex
Integration and Apex Utilities
Invoking Callouts Using Apex
JSON Support
XML Support
Securing Your Data
Encoding Your Data
Using Patterns and Matchers
Debugging, Testing, and Deploying Apex
Apex Language Reference
Appendices
Glossary
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Integration and Apex Utilities

Apex allows you to integrate with external SOAP and REST Web services using callouts. You can use utilities for JSON, XML, data security, and encoding. A general-purpose utility for regular expressions with text strings is also provided.