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    This comment is hidden because it contains spoiler information about the solution

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    Is something wrong with the system?

    {} is the output from:

    var deps = {
  'dep1': function() { return 'this is dep1'; },
  'dep2': function() { return 'this is dep2'; },
  'dep3': function() { return 'this is dep3'; },
  'dep4': function() { return 'this is dep4'; }
};

console.log(deps);

    If there's any functions in the object it removes them all for some reason..

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    If giving integers in JavaScript 00 will be passed to the function as 0 and will result in 10 and not 20 as the example specifies unless I'm missing something...