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class test1
  def Fib(max)
    i1,i2 = 1,1
    while i1 <= max
      yield i1
      ......

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ruby ÒªÈçºÎ寫bnf

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a program will ONLY accept strings based on the following grammar:

            <compute> --> <value> = < ......

Ruby on Rails£¨¼±£¡£¡£¡£¡£¡£¡ÔÚÏߵȣ©

HTML code:

<%= link_to_if_authorized l(:field_search_title), {:controller => 'books', :action => 'search', :project_id => @project, :title => @title} %>
<%= text_field_tag 't ......

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def change_str(num)
  str = num.to_s
  nil while str. ......
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