The collection is not an array

Question

The collection is not an array

I am currently running the following code:

var n = [];
jQuery.toJSON( n );

Interestingly, on one page I receive "[]", while on another I get ""[]"". Both pages are utilizing the same version of jQuery along with a toJson Plugin.

Upon inspecting the arrays in Firefox DOM, it appears that they have similar function names but differ in implementation:

all     b(B, A)
any     j(B, A)

all     all(iterator, context)
any     any(iterator, context)

It seems like there may be some Array.prototype functions being applied before my script runs, leading to this discrepancy. Unfortunately, I am unable to modify the existing code and need to find a workaround for this issue.

I've experimented with using new Array() and jQuery.makeArray(n), yet the outcome remains unchanged. While I understand that the equality of the arrays is not crucial, I am seeking a way to generate identical JSON output. The complexity increases when dealing with strings within the array: ""[\"a\", \"b\"]""

javascript json

Answer 1

Answer №1

Those extra quotes you're seeing are a result of the

Array.prototype.toJSON

method that is defined by the Prototype library, and potentially by other libraries as well. When jQuery.toJSON (or JSON.Stringify() for that matter) is called, this function adds the additional quotes. To resolve this issue, you can:

delete Array.prototype.toJSON // eliminate toJSON for all Arrays
//or
delete n.toJSON // eliminate toJSON for specific Array

Prior to using jQuery.toJSON. Another option would be to use

JSON.stringify(object)

instead of jQuery.toJSON. This method is supported in most browsers natively. For cross-browser compatibility, consider using https://github.com/douglascrockford/JSON-js, which serves as the foundation for JSON.stringify().

For more information on JSON.stringify(), refer to https://developer.mozilla.org/En/Using_native_JSON.

Answer 2

Those extra quotes you're seeing are a result of the

Array.prototype.toJSON

method that is defined by the Prototype library, and potentially by other libraries as well. When jQuery.toJSON (or JSON.Stringify() for that matter) is called, this function adds the additional quotes. To resolve this issue, you can:

delete Array.prototype.toJSON // eliminate toJSON for all Arrays
//or
delete n.toJSON // eliminate toJSON for specific Array

Prior to using jQuery.toJSON. Another option would be to use

JSON.stringify(object)

instead of jQuery.toJSON. This method is supported in most browsers natively. For cross-browser compatibility, consider using https://github.com/douglascrockford/JSON-js, which serves as the foundation for JSON.stringify().

For more information on JSON.stringify(), refer to https://developer.mozilla.org/En/Using_native_JSON.

Answer 3

Answer №2

Here's a quick fix I came up with:

function sanitizeJsonString(input)
{
    if (input[0] == '"')
    {
        input = input.substring(1, input.length-1).replace(/\\"/g,'"');
    }
    return input;
}

This method gets the job done, but I'm on the hunt for a more elegant solution.

Answer 4

Here's a quick fix I came up with:

function sanitizeJsonString(input)
{
    if (input[0] == '"')
    {
        input = input.substring(1, input.length-1).replace(/\\"/g,'"');
    }
    return input;
}

This method gets the job done, but I'm on the hunt for a more elegant solution.

The collection is not an array

Answer №1

Answer №2

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