a question about eval in javascript

Question

thank you. here is the correct question:

{
    "VID":"60",
    "name":"\u4f1a\u9634",
    "requireLevel":"20",
    "levelMax":"5",
    "venationRequirement":"0",
    "description":"\u6c14\u6d77\u4e0a\u9650\u63d0\u9ad8[Affect1]\u70b9",
    "cost":{"1":"240","2":"360","3":"400","4":"600","5":"720"},
    "difficult":{"1":"1024","2":"973","3":"921","4":"870","5":"819"},
    "affect":{"1":"200","2":"500","3":"900","4":"1400","5":"2000"},
    "descriptions":{
        "1":"\u6c14\u6d77\u4e0a\u9650\u63d0\u9ad8200\u70b9",
        "2":"\u6c14\u6d77\u4e0a\u9650\u63d0\u9ad8500\u70b9",
        "3":"\u6c14\u6d77\u4e0a\u9650\u63d0\u9ad8900\u70b9",
        "4":"\u6c14\u6d77\u4e0a\u9650\u63d0\u9ad81400\u70b9",
        "5":"\u6c14\u6d77\u4e0a\u9650\u63d0\u9ad82000\u70b9"
    }
}

i used json_encode() in php ,and ajax request to get the response text.

but when i use eval() to parse the response text. it's wrong.

moonshadow and james gregory has answered this question at the comments below.thank you again.

James Gregory · Accepted Answer · 2008-12-23 10:17:15Z

4

Your second one is wrong because you're evaluating a hash, for it to work you'd need to rewrite it to be something like:

var s = '{"first": {"a":1}, "second": {"b":2}}';

answered Dec 23, 2008 at 10:17

James Gregory

14.2k2 gold badges46 silver badges60 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Community · Accepted Answer · 2017-05-23 10:32:49Z

3

Javascript gets a little confused about what, in what context, it is parsing. Prepend a '(' and append a ')' before passing the string to eval() to force it to parse the whole thing as an expression.

(Your question as posed is also missing labels for the outer associative array, as others have pointed out, however the sample data you've provided clarifies the actual problem).

edited May 23, 2017 at 10:32

CommunityBot

11 silver badge

answered Dec 23, 2008 at 10:46

moonshadow

89.6k7 gold badges87 silver badges122 bronze badges

Comments

Jonas · Accepted Answer · 2008-12-23 10:17:50Z

2

If your second example is an attempt to create an object with two nested objects, you're missing the names for the properties of the outer object, e.g.

var s = '{ "FirstSubObject" : {"a":1}, "SecondSubObject":{"b":2}}';

answered Dec 23, 2008 at 10:17

Jonas

Comments

Ruben Bartelink · Accepted Answer · 2008-12-23 10:14:15Z

0

The [] syntax is explicitly for creating arrays whereas {} has a completely different meaning (it thinks you're trying to create a function/block)

answered Dec 23, 2008 at 10:14

Ruben Bartelink

62.2k32 gold badges196 silver badges266 bronze badges

Comments

Vasil · Accepted Answer · 2008-12-23 10:47:45Z

0

Using json is a much better solution for this.

answered Dec 23, 2008 at 10:47

Vasil

38.5k27 gold badges94 silver badges116 bronze badges

Collectives™ on Stack Overflow

a question about eval in javascript

but when i use eval() to parse the response text. it's wrong.

5 Answers 5

Comments

Comments

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

but when i use eval() to parse the response text. it's wrong.

5 Answers 5

Comments

Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related