Generate amida, a traditional Japanese randomizer ;

amida_generator

  function Amida( col , row ){
    this.amidaModel = new AmidaModel( col , row  );
  }

  Amida.prototype.print = function( ){
    var chars = ["├" , "┤" , "│" ];
    var prev = 0 ;
    var grid = this.amidaModel.getArray();


    var line = [] ;
    for( var i = 0 , n = grid.length ; i < n ; i++ ){
      var row = grid[i];
      row.push( 0 );//番兵としてつっこむ
      for( var j = 0 , m = row.length ; j < m ; j++ ){
        var current = row[j];
        var charIndex ;
        if( prev ){
          charIndex = 1 ;
        }else if( current ){
          charIndex = 0 ;
        }else{
          charIndex = 2 ;
        }

        prev = current ;

        line.push( chars[ charIndex ] );
      }
      line.push( "\n" );
    }

    console.log( "",line.join("") );
  }



  function AmidaModel( col , row ){
    this.col = col ;
    this.row = row ;
  }

  AmidaModel.prototype.getArray = function(){
    var grid = [] ;
    var row = this.row , col = this.col ;
    for( var i = 0 ; i < row; i++ ){
      var hasLine = false;

      grid[i] = [] ;

      for( var j = 0 ; j < col ; j++ ){
        if( hasLine ){
          hasLine = false;
        }else{
          hasLine = Math.random() > 0.5 ;
        }

        grid[i][j] = hasLine > 0.5 ; 
      }
    }
    return grid ;
  };


// ( new Amida( 5 , 10 ) ).print() ;