小编Iva*_*van的帖子

我试过这句话:SELECT*FROM table_name它不起作用.从Mongodb中的表中选择所有行的命令或方法是什么？

我有一个数组:

var myArray = [
    {question: "Who is Prime Minister of the United Kingdom?",
     choices: ["David Cameron", "Gordon Brown", "Winston Churchill", "Tony Blair"], 
     correctAnswer:0}, 
    {question: "What is the capital of UK?", 
     choices: ["Paris", "Washington", "London", "Liverpool"], 
     correctAnswer:2}];

我把它串起来之后.它看起来像这样:

JSON.stringify(myArray)
"[
     {
      "question":"Who is Prime Minister of the United Kingdom?",
      "choices":[
                  "David Cameron","Gordon Brown",
                  "Winston Churchill",
                  "Tony Blair"
                ],
      "correctAnswer":0
     },
     {
       "question":"What is the capital of UK?",
       "choices":[
                   "Paris",
                   "Washington",
                   "London",
                   "Liverpool"
                 ],
       "correctAnswer":2
     }
]"

哪个是无效的JSON.如何使其有效？