定义返回 'undefined' 的对象的属性
Defining properties of an object returning 'undefined'
我正在尝试创建一个主对象来保存我的程序的数据,如下所示:
var state;
var init = function() {
state = {
runInfo: { //object that'll hold manufacturing info - run, desired price, servings/container
price: null,
containers: null,
servings: null
},
formula: [],
totalsServing: [],
totalsBottle: [],
totalsRun: []
};
};
我正在尝试使用以下函数设置 runInfo 对象的属性 w/in state 对象:
manufacturingInfo = function(price, containers, servings) {
state.runInfo.price = price;
state.runInfo.containers = containers;
state.runInfo.servings = servings;
};
当我这样测试函数时:
init();
console.log(manufacturingInfo(10, 500, 30));
它returns'undefined.'
不知道为什么。
该函数 return 没有任何作用。其实就是运行函数成功了。但是因为您没有 return 语句,所以 return 值将是 undefined
.
要更改它,请在您的函数中添加 return
语句。
你的函数 manufacturingInfo
没有 return
东西,所以调用的值是 undefined,但是它确实对 state
,所以也许你真的想
init();
manufacturingInfo(10, 500, 30);
console.log(state);
您希望它达到什么效果 return?
manufacturingInfo = function(price, containers, servings) {
state.runInfo.price = price;
state.runInfo.containers = containers;
state.runInfo.servings = servings;
return state.runInfo; // anything here you want the function to report
};
我正在尝试创建一个主对象来保存我的程序的数据,如下所示:
var state;
var init = function() {
state = {
runInfo: { //object that'll hold manufacturing info - run, desired price, servings/container
price: null,
containers: null,
servings: null
},
formula: [],
totalsServing: [],
totalsBottle: [],
totalsRun: []
};
};
我正在尝试使用以下函数设置 runInfo 对象的属性 w/in state 对象:
manufacturingInfo = function(price, containers, servings) {
state.runInfo.price = price;
state.runInfo.containers = containers;
state.runInfo.servings = servings;
};
当我这样测试函数时:
init();
console.log(manufacturingInfo(10, 500, 30));
它returns'undefined.'
不知道为什么。
该函数 return 没有任何作用。其实就是运行函数成功了。但是因为您没有 return 语句,所以 return 值将是 undefined
.
要更改它,请在您的函数中添加 return
语句。
你的函数 manufacturingInfo
没有 return
东西,所以调用的值是 undefined,但是它确实对 state
,所以也许你真的想
init();
manufacturingInfo(10, 500, 30);
console.log(state);
您希望它达到什么效果 return?
manufacturingInfo = function(price, containers, servings) {
state.runInfo.price = price;
state.runInfo.containers = containers;
state.runInfo.servings = servings;
return state.runInfo; // anything here you want the function to report
};