code: function ( src )
  	{
  		// A faster unique method is to use object keys to identify used values,
  		// but this doesn't work with arrays or objects, which we must also
  		// consider. See jsperf.com/compare-array-unique-versions/4 for more
  		// information.
  		var
  			out = [],
  			val,
  			i, ien=src.length,
  			j, k=0;
  	
  		again: for ( i=0 ; i<ien ; i++ ) {
  			val = src[i];
  	
  			for ( j=0 ; j<k ; j++ ) {
  				if ( out[j] === val ) {
  					continue again;
  				}
  			}
  	
  			out.push( val );
  			k++;
  		}
  	
  		return out;
  	}
docs: Find the unique elements in a source array.
  
  @param  {array} src Source array
  @return {array} Array of unique items
  @ignore