Dart¶

Client-optimized language for fast apps

Overview¶

Dart is Google's language for building mobile, desktop, and web applications. It's the language behind Flutter, Google's UI toolkit.

Language Aliases¶

run dart "void main() { print('Hello'); }"
run dartlang "void main() { print('Hello'); }"
run flutter "void main() { print('Hello'); }"
# Output: Hello (x3)

Important: Shell Quoting and Here-Docs¶

Inline --code snippets are written to a temporary .dart file and executed with dart run. However, shell quoting still matters - single quotes or unescaped characters will cause zsh to attempt globbing or parameter expansion.

Use a quoted here-doc to avoid shell interpretation problems.

Recommended - Using here-doc¶

cat <<'EOF' | run dart
void main() {
  print('[Dart] hello');
}
EOF
# Output: [Dart] hello

Safe inline (zsh)¶

run --lang dart --code $'void main() { print("[Dart] hello"); }\n'
# Output: [Dart] hello

Basic Dart Example¶

cat <<'EOF' | run dart
void main() {
  var name = 'Flutter';
  print('Hello from $name!');
}
EOF
# Output: Hello from Flutter!

REPL Behavior¶

Dart's REPL maintains state across commands. Variables, functions, and classes persist within the same REPL session.