code: function getBuffer( W ) {
  		var buffer = new Array( W );
  		for ( var i = 0; i < W; i++ ) {
  			buffer[ i ] = 0;
  		}
  		return buffer;
  	}
docs: FUNCTIONS // 
  FUNCTION: getBuffer( W )
  Returns a buffer array where each element is pre-initialized to zero.
  
  @private
  @param {number} W - buffer size
  @returns {array} buffer