use*_*104 0 oop node.js coffeescript
如果我有这样的代码:
class SomeClass
constructor: ->
@someAttr = false
someFunction: ->
process.nextTick ->
@someAttr = true
obj = new SomeClass
obj.someFunction()
obj.someAttr # Would still be false, because the @ (this) is in the process context
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它不起作用,因为process.nextTick将我们带入了一个不同的上下文,其中没有定义@someAttr.我该如何解决这个问题(当我想调用SomeClass的方法时)?
通常的方法是将一个引用存储this在一个局部变量中,该变量将在匿名函数中可用.在JavaScript中:
function someFunction() {
var self = this;
process.nextTick(function() {
self.someAttr = true;
});
}
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CoffeeScript有一个特殊的语法来帮助解决这个问题." 胖箭 ":
class SomeClass:
someFunction: ->
process.nextTick =>
@someAttr = true
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