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JavaScript's functional programming helper library.

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define(['./restArguments', './isFunction', './negate', './map', './_flatten', './contains', './pick'], function (restArguments, isFunction, negate, map, _flatten, contains, pick) {

  // Return a copy of the object without the disallowed properties.
  var omit = restArguments(function(obj, keys) {
    var iteratee = keys[0], context;
    if (isFunction(iteratee)) {
      iteratee = negate(iteratee);
      if (keys.length > 1) context = keys[1];
    } else {
      keys = map(_flatten(keys, false, false), String);
      iteratee = function(value, key) {
        return !contains(keys, key);
      };
    }
    return pick(obj, iteratee, context);
  });

  return omit;

});