Dart语法概要
// 定义个方法。
printNumber(num aNumber) {
print('The number is $aNumber.'); // 在控制台打印内容。
}
// 这是程序执行的入口。
main() {
var number = 42; // 定义并初始化一个变量。
pri ...……
A package is a mechanism to encapsulate a group of programming units. Applications might at times need integration of some third-party libraries or plugins. Every language has a mechanism for managing……