promise都是基于回调模式的
高阶函数
-
如果函数的参数是一个函数
-
如果一个函数返回一个函数
科里化: 让函数的功能更具体 判断变量的类型 typeof construcor
instanceof Object.prototype.toString.call
手写promise
promise都是基于回调模式的
高阶函数
如果函数的参数是一个函数
如果一个函数返回一个函数
科里化: 让函数的功能更具体 判断变量的类型 typeof construcor
instanceof Object.prototype.toString.call
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