javascript - 如何使用不同的变量重用闭包

Question

我想重用 sayMyName 函数，但使用不同的变量。如果我的构建方式错误，请告诉我，以及我正在尝试做什么的最佳实践是什么。

var sayMyName = function(myName) {
  console.log(myName)
};

var name1 = function() {
  // myName should not be a global variable 
  // because there may be more variables/functions 
  // that I'd want to closed inside sayMyName(). 
  // Declaring all of them to the global scope is not ideal.
  var myName = 'Walter';

  sayMyName();
  // I don't want to pass in myName as argument like this:
  // sayMyName(myName);
  // I want myName to be implicitly included in sayMyName()
  // I want to pass in everything that is declared in name1 to sayMyName() implicitly.
};

var name2 = function() {
  var myName = 'White'; 
  sayMyName();
}

name1(); // should give me 'Walter'
name2(); // should give me 'White'

Answer 1

我不确定为什么你特别想要一个闭包，但通过查看你的示例，似乎绑定(bind)比闭包更合适。

var sayMyName = function(myName) {
  console.log(myName)
};

var name1 = sayMyName.bind(undefined, 'Walter');
var name2 = sayMyName.bind(undefined, 'White');

name1(); // log 'Walter'
name2(); // log 'White'