index.js
function Filter(options) {
  this.options = options || {};

  for (var group in operators) {
    var prop = group.toLowerCase();
    this[prop] = this.mask(group, this.options[prop]);
  }
}
function Filter(options) {
  this.options = options || {};

  for (var group in operators) {
    var prop = group.toLowerCase();
    this[prop] = this.mask(group, this.options[prop]);
  }
}
function Filter ( options ) { this . options = options || { } ; for ( var group in operators ) { var prop = group . toLowerCase ( ) ; this [ prop ] = this . mask ( group , this . options [ prop ] ) ; } }
Strip MongoDB operators from user provided objects.

@Constructor
@param {Object} options
@api public
Strip MongoDB operators from user provided objects .