访问以number开头的javascript对象属性

问题描述

我正在调用一个返回对象的api

I am calling an api which returns an object

var rain = data[i].rain;

$.get( "http://api.openweathermap.org/data/2.5/forecast?q=London,uk&mode=json&units=metric", function( data ) {
    var data = data.list;
    for(var i = 0; i < 12; i++){
        var rain = data[i].rain;
        console.log(rain)
    }
});

当我检查控制台时，雨返回以下内容：

rain returns the following when I inspect the console:

Object {3h: 0.005}
Object {3h: 0.03}

我预计 rain.3h 会让我访问0.005和0.03，但事实并非如此。我收到以下错误消息：意外的令牌ILLEGAL

I expected that rain.3h would have given me access to 0.005 and 0.03, but it doesn't. I get the following error message : Unexpected token ILLEGAL

这是因为它以数字开头吗？任何人都可以建议如何访问这个属性？

Is this because it begins with a number? Can anyone advise how to access this property?

推荐答案

是的，因为它以数字开头。

Yes it's because it begins with a number.

你可以这样访问：

rain['3h']

如果您有以数字或符号命名的对象属性，请使用括号表示法。

When you have object properties named with numbers or simbols, use the bracket notation.

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