Determine if a value is empty
This is used by the built-in if and with helpers to control their execution flow.
The Handlebars definition of empty is any of:
- Array with length 0 - falsy values other than 0
This is intended to match the Mustache Behaviour.
| Name | Description | 
|---|---|
| arg | The value to test | 
https://mustache.github.io/mustache.5.html#Sections