Dart tear-offs

tear-offs

tear-offs 是一种特殊的闭包，允许开发者通过 forEach 迭代向 Function 对象直接传递参数。本质是是闭包语法调用的语法糖，具有显著的可读性。

此处可以对照 tear-off 与 lambda 的写法差距

/// This is a example of dart tear-offs.

/// a "tear-offs" is a closure that takes the same parameters as the method and invokes it when you call it.

List<int> a = [1,2,3,4,5,6];
Map<int,String> b = new Map()
  ..[0]= "0000"
  ..[1]= "1111"
  ..[2]= "2222"
  ..[3]= "3333";


c(int a ,String b){
  print(a.toString() + "----"+ b );
}


void main(){
  a.forEach(print);
  b.forEach(c);
  
}

在 DartPad 运行此代码

赏

谢谢你请我吃糖果