Define “cyclic data structures”

Question

At the JSON site it says

JSON does not support cyclic data structures, so be careful to not give cyclical structures to the JSON stringifier.

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Answer 1

if you have:

var a = {value: 'a'};
var b = {value: a};
var c = {value: a};

In JSON for b it would look like:

"{value: {value: 'a'}}"

In JSON for c it would look like:

"{value: {value: 'a'}}"

No pointers.