es7 函数绑定

Posted 2020-09-16 宝清老窖

函数绑定运算符是并排的双冒号::

foo::bar
== 
bar.bind(foo);

foo::bar(...arguments);
==
bar.apply(foo, arguments);

var method = ::obj.foo
//==
var method = obj.foo.bind(obj)

 尾调用

function f(x){
  if(x > 0){
    return m(x);
  }
  return n(x);
}