速记的方式来构建具有可变属性名JS对象 [英] Shorthand way to construct JS object with variable property name

问题描述

有没有创建一个属性字段变量对象的速记方式？

Is there a shorthand way to create an object with a property field variable?

说我有变量 PROP.Todo.PRIORITY ='优先'，然后使用的骨干在这个例子中，我想保存这个属性，我怎么能避免创建新的对象，将其分配给一些变量，然后设置属性？

Say I have the variable PROP.Todo.PRIORITY = 'priority' and then, using Backbone in this example, I want to save this property, how can I avoid having to create a new object, assigning it to some variable and then set the property?

我要做到这一点：

var tmpObj = {};
tmpObj[PROP.Todo.PRIORITY] = "high";
this.model.save(tmpObj);

我已经试过这样的事情，这是不成功的：

I've tried something like this, which was unsuccessful:

this.model.save(({}[PROP.Todo.PRIORITY] = "high"));

有什么建议？我要另行编写大量长手对象声明的。

Any suggestions? I'm going to be writing a lot of long-hand object declarations otherwise.

推荐答案

如果你只是想要一个简单的方法来创建对象，如何使用一个辅助函数？

If you just want an easier way to create the object, how about using a helper function?

function obj(prop, value) {
  var o = {};
  o[prop] = value;
  return o;
}

this.model.save(obj(PROP.Todo.PRIORITY, "high"));

我不知道我理解你的问题的后半部分：

I'm not sure I understand the latter part of your question:

我要另行创建大量的临时对象。

I'm going to be creating a lot of temporary objects otherwise.

您必须创建在任何情况下一个对象，我怀疑创建对象是一个性能问题。

You'll have to create an object in any case, and I doubt creating objects is a performance issue.

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