Writing Idiomatic Dart Collections and Strings

Contents

• String Composition
• Collection Initialization
• Collection Operations
• Type Casting in Collections
• Workflow: Refactoring Legacy Collections

String Composition

Follow these practices to compose strings efficiently and readably.

• Use adjacent strings for concatenation: Do not use the + operator to concatenate string literals. Place them next to each other to form a single string.
• Prefer string interpolation: Use $variable or ${expression} to compose strings and values instead of concatenation (+).
• Omit unnecessary curly braces: Use $identifier instead of ${identifier} when interpolating a simple identifier that is not immediately followed by alphanumeric text.

Examples

Good: