07 Variables in tag expressions - domain-centric/template_engine GitHub Wiki
A variable is a named container for some type of information (like a number, boolean, string, etc...)
- Variables are stored as key, value pairs in a dart Map<String, dynamic> where:
- String=Variable name
- dynamic=Variable value
- Variables can be used in an ExpressionTag
- Initial variable values are passed to the TemplateEngine.render method
- Variables can be modified during rendering
The variable name identifies the variable and corresponds with the keys in the variable map.
The variable names:
- are case sensitive
- must start with a lower case letter, optionally followed by (lower or upper) letters and or digits.
- conventions: use lowerCamelCase
- must be unique and does not match a other tag syntax
Variables can be nested. Concatenate variable names separated with dot's to get the variable value of a nested variable name: E.g.: Variable map: {'person': {'name': 'John Doe', 'age',30}} Variable name person.name: refers to the variable value of 'John Doe'
Examples: