--- to_a

    ֥ȤѴޤ̤ѴǤʤ
    ֥ȤϡȤΤߤޤĹ 1 Ѵޤ
    (ruby 1.7 feature: εưϾʤʤ뤫⤷ޤ1.7 
    ǤϷٹ𤬽Фޤ)

    
        p( {'a'=>1}.to_a )  # [["a", 1]]
        p ['array'].to_a    # ["array"]
        p 1.to_a            # [1]
        p 'str'.to_a        # ["str"]

