Created
January 28, 2013 04:44
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Circular reference JSON.stringify wrapper
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var repeatingArray = [4, 5, 6]; | |
var circularObj = { | |
a: 1, | |
b: 1, | |
c: "an allowed repeating string", | |
d: "an allowed repeating string", | |
e: repeatingArray, | |
f: repeatingArray, | |
g: [ | |
repeatingArray, | |
repeatingArray | |
] | |
}; | |
circularObj.h = circularObj; | |
var myObj = { | |
co: circularObj | |
}; | |
function stringifyOnce(obj, replacer, indent){ | |
var printedObjects = []; | |
var printedObjectKeys = []; | |
function printOnceReplacer(key, value){ | |
var printedObjIndex = false; | |
printedObjects.forEach(function(obj, index){ | |
if(obj===value){ | |
printedObjIndex = index; | |
} | |
}); | |
if(printedObjIndex && typeof(value)=="object"){ | |
return "(see " + value.constructor.name.toLowerCase() + " with key " + printedObjectKeys[printedObjIndex] + ")"; | |
}else{ | |
var qualifiedKey = key || "(empty key)"; | |
printedObjects.push(value); | |
printedObjectKeys.push(qualifiedKey); | |
if(replacer){ | |
return replacer(key, value); | |
}else{ | |
return value; | |
} | |
} | |
} | |
return JSON.stringify(obj, printOnceReplacer, indent); | |
} | |
console.log(stringifyOnce(myObj, undefined, 4)); |
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