README.md

#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])

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Why does calling the previous statement returns false?

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.

__match_answer_and_solution__

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