使用局部或全局变量访问 json 文件的最佳方法是什么？

Question

I am code for Cordova javascript currently, I am using JSON array object to store examples, questions, answer and more details, approximately the object size is 1MB, and store the objects into a global variable and access it whenever need it like below.

var _quiz=
[{
    v1:1
    ,code:"q1"
    ,type:"x1"
    ,question:"This is the question"
    ,answer:1
    ,options:"Ans1!###Ans2!###Ans3###Ans4"
},
{
    v1:1
    ,type:"x2"
    ,certificate:"bronz"
    ,question:"This is the question"
    ,answer:3
    ,options:"Ans1!###Ans2!###Ans3###Ans4"
}
...
...
];


//Need to call many times
function processQuestion()
{
    _quiz
    ...
    ...
}

但我认为这会在 memory 中占用更多空间，并可能导致应用程序崩溃。 So I think we can store and return the JSON object from the function whenever needs, so it will not take too much memory and objects store as a local variable like the below example. 请建议最好的方法。

function get_object()
{
    var obj=
    [{
        v1:1
        ,code:"q1"
        ,type:"x1"
        ,question:"This is the question"
        ,answer:1
        ,options:"Ans1!###Ans2!###Ans3###Ans4"
    },
    {
        v1:1
        ,type:"x2"
        ,certificate:"bronz"
        ,question:"This is the question"
        ,answer:3
        ,options:"Ans1!###Ans2!###Ans3###Ans4"
    }
    ...
    ...
    ];

    return obj;
}


//Need to call many times
function processQuestion()
{
    var ques=get_object();
    ...
    ...
}

Answer 1

在第二种方法中使用 let 并且您可以做的另一件事是删除 var 声明并直接从 get_object() function 返回 object，因此也有声明，如 return {object}。