Do the JSON keys have to be surrounded by quotes?（转载）
问
Example: Is the following code valid against the JSON Spec?
{
precision: "zip"
}
Or should I always use the following syntax? (And if so, why?)
{
"precision": "zip"
}
I haven't really found something about this in the JSON specifications. Although they use quotes around their keys in their examples.
答
Yes, you need quotation marks. This is to make it simpler and to avoid having to have another escape method for javascript reserved keywords, ie {for:"foo"}.
