ERB: Embedded Ruby

A quick talk I gave on ERB at the Dallas Ruby Brigade during a tour of templating engines.

Transcript

1. ERB Embedded Ruby
2. Part of the Std-lib
3. Hello, World!
4. Execute
5. Output
6. Comments
7. Loops
8. $SAFE • `nil` means do nothing • Anything else runs the code in a thread and uses that particular safe mode. • What are safe modes?
9. Trim Modes • % enables Ruby code processing for lines beginning with % • <> omit newline for lines starting with <% and ending in %> • > omit newline for lines ending in %> • - omit blank lines ending in -%>
10. ERB::Util
11. Rails • Looks for your templates to have a “erb” extension. • Automatically turns on “-“ trim mode. • Automatically imports instance variables from your controller action. • Also imports `locals` passed in a `render` call.