man

man

ri

 ---------------------------------------------------- FileUtils::commands
      FileUtils::commands()
 ------------------------------------------------------------------------
      Returns an Array of method names which have any options.
 
        p FileUtils.commands  #=> ["chmod", "cp", "cp_r", "install", ...]
 

refe

 Float.MANT_DIG
 --- MANT_DIG
 
     仮数部の Fload::RADIX 進法での桁数
 

* はてなダイアリーキーワード:man