Why is jQuery.parseJSON throwing an error?

Question

JavaScript

Hello.
I use this code

var j = '["foo": 1]';
var object = jQuery.parseJSON(j);

Nothing special, the json string is written correctly, the script itself is utf-8 encoded. And it gives the error "SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data".
Browser Firefox Developer Edition

Tell me, what could be the matter?

with curly '{"foo":1}' also tried, the same error.

Answer 1

objects with curly braces

j = '{"foo": 1}'
JSON.parse(j)

Answer 2

In JSON, square brackets represent an array, and you're trying to fit an object into them.
'{"foo":1}'or '[1]'or '[{"foo":1}]', depending on what you need.