javascript Node JS - 从同一文件中的另一个方法调用一个方法
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/12274381/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Node JS - Calling a method from another method in same file
提问by Veera
I have this nodeJS code.
我有这个 nodeJS 代码。
module.exports = {
foo: function(req, res){
...
this.bar(); // failing
bar(); // failing
...
},
bar: function(){
...
...
}
}
I need to call the bar()method from inside the foo()method. I tried this.bar()as well as bar(), but both fail saying TypeError: Object #<Object> has no method 'bar()'.
我需要bar()从方法内部调用该foo()方法。我想 this.bar()还有bar()，但都失败说TypeError: Object #<Object> has no method 'bar()'。
How can I call one method from the other?
如何从另一种方法调用一种方法？
采纳答案by timidboy
You can do it this way:
你可以这样做：
module.exports = {
foo: function(req, res){
bar();
},
bar: bar
}
function bar() {
...
}
No closure is needed.
不需要关闭。
回答by Nicolas Bonnici
The accepted response is wrong, you need to call the bar method from the current scope using the "this" keyword:
接受的响应是错误的，您需要使用“this”关键字从当前范围调用 bar 方法：
module.exports = {
foo: function(req, res){
this.bar();
},
bar: function() { console.log('bar'); }
}
回答by ChaosPandion
回答by Lucas Green
Try this:
试试这个：
module.exports = (function () {
function realBar() {
console.log('works');
}
return {
foo: function(){
realBar();
},
bar: realBar
};
}());
回答by Chanaka Fernando
Try the following code. You can refer each function from anywhere (needs to import .js file)
试试下面的代码。您可以从任何地方引用每个函数（需要导入 .js 文件）
function foo(req,res){
console.log("you are now in foo");
bar();
}
exports.foo = foo;
function bar(){
console.log("you are now in bar");
}
exports.bar = bar;
回答by Nassim
in Node js + Express, you can use this syntax in the same controller
在 Node js + Express 中，你可以在同一个控制器中使用这个语法
//myController.js
exports.funA = () =>{
console.log("Hello from funA!")
//cal funB
funB()
}
let funB = () =>{
console.log("Hello from funB!")
}
make sure to use the letkeyword before the function and call it with the ()parentheses inside the main function
确保在函数前使用let关键字，并在主函数内使用()括号调用它
OUTPUT
输出
App listening at http://localhost:3000
Hello from fun A!
Hello from fun B!
回答by user323774
Is bar intended to be internal (private) to foo?
bar 是否旨在成为 foo 的内部（私有）？
module.exports = {
foo: function(req, res){
...
function bar() {
...
...
}
bar();
...
}
}
