How to access object property beginning with a number (SyntaxError: Unexpected identifier)

问题

I have an object within another object, which im trying to get the value but it always returns "unexpected identifier".

snow: Object {3h: 1.3}

console.log(data.snow.3h) //returns Uncaught SyntaxError: Unexpected identifier

console.log(data.snow) //returns Object {3h: 1.3}

So how can i get the value of 3h ?

回答1:

data.snow['3h'];

Properties accessed with dot notation can't begin with a number.

snow: Object {3h: 1.3} could be refactored to snow: {3h: 1.3}. It is redundant to type Object.

Also, if you wrap your property names in quotes, you can use bizarre property names like:

var myObj = {
  '^': 'foo'
};
console.log(myObj['^']);

but, I generally stick to more standard names that I can access with dot notation.

来源：https://stackoverflow.com/questions/20336085/how-to-access-object-property-beginning-with-a-number-syntaxerror-unexpected-i