javascript JSON多维数组

Question

Please check my fiddle and tell me what I did wrong? I don't want option0. why it is coming.

var qus ={ 
    {

    "qus" :"what is your name?",
    "option0" : {"ans" : "w", "cor":"h"},
    "option1" : {"ans" : "Alex", "cor":"false"},
    "option2" : {"ans" : "Hervy", "cor":"false"},
    "option3" : {"ans" : "Rico", "cor":"true"},
    "option4" : {"ans" : "Tom", "cor":"false"},
    },

}

Here is my jsfiddle link http://jsfiddle.net/rushdi1987/jvhgxawm/4/

Answer 1

Small change:

 for (n in objects[i]) {

        if(typeof objects[i][n] !='string') {


        document.getElementById("out").innerHTML += '"option' + n + '" : {"ans" : ' + objects[i][n][0] + ', "cor:"' + objects[i][n][1] + '"},<br>';
        }
    };

If you console.log(objects[i][n]), you will notice that you have question string as element in loop. So, this way you can skip it... (or some other way, as suggested in answers)

Demo: http://jsfiddle.net/jvhgxawm/7/

However, re-structuring your initial array (if you can) - would be better option.

Answer 2

jsFiddle Demo

Option0 is in there because it is part of the array. The 0 index of your array is "what is your name?" , in the first piece, and "what is your brother's name?" in the second.

Using for in is going to iterate each index, and taking the 0 index ends up taking that string as one of the possible answers you have. As you are assuming that [0] of the answer is the name, and [1] as the flag, the result of [0] and [1] on "what is your name?" is w and h . The index of the array is 0 at that point, so you end up with "option0" : {"ans" : w, "cor:"h"}, which you don't want.

The fix is simple, just skip that index in your for in loop using a conditional if and a continue

if(n == 0)continue;

I slightly refactored your code to make it a little easier to read as well

var objects = [
    [
        "what is your name?", 
        ["Alex", false],
        ["Hervy", false],
        ["Rico", true],
        ["Tom", false]
    ],
    [
        "what is your brother's name?", 
        ["Alex", false],
        ["Hervy", true],
        ["Rico", false],
        ["Tom", false]
    ]
];

var el = document.getElementById("out");

el.innerHTML += 'var qus ={ <br>';

for (i in objects){
    var qset = objects[i];

    el.innerHTML += '{ <br>';
    el.innerHTML += '"qus" :"' + qset[0] + '",<br>';

    for (n in qset){
        if(n == 0)continue;
        var nameset = qset[n];

        el.innerHTML += '"option' + n;
        el.innerHTML += '" : {"ans" : ' + nameset[0];
        el.innerHTML += ', "cor:"' + nameset[1] + '"},<br>';
    }

    el.innerHTML += '},<br><br>';
}
el.innerHTML += '}';

Answer 3

It makes more sense to store the different options as an array. So intead of:

["what is your name?", ["Alex", false],
    ["Hervy", false],
    ["Rico", true],
    ["Tom", false]
],

you should make this:

["what is your name?", [ 
    ["Alex", false],
    ["Hervy", false],
    ["Rico", true],
    ["Tom", false]
]],

then, in the inner loop, replace objects[i] with objects[i][1] :

for (n in objects[i][1]) {
    document.getElementById("out").innerHTML += '"option' + n + '" : {"ans" : ' + objects[i][1][n][0] + ', "cor:"' + objects[i][1][n][1] + '"},<br>';
};

Here you have the fiddle updated .

Hope it helps!