#2 Fooling around boolean

All the following statements are true

!!{} == true;

[] == false;

We have the following code:

var hasTruthyStuff = function (aSymbols) {
 var nResult = 0,
 i = 0,
 nLen = aSymbols.length;
 for (; i < nLen; i++) {
 nResult |= aSymbols[i];
 }
 return !!nResult;
};

But when we execute the following statement it returns false when we expected to return true because {} should return true.

hasTruthyStuff([{},[], 0])

You have to be careful when using |= because when it's used to perform a test besides an object it will not modify the original value, then it remains to be zero.

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