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--- !ruby/object:RI::MethodDescription aliases: [] block_params: comment: - !ruby/struct:SM::Flow::P body: Reads at most <em>length</em> bytes from the I/O stream, or to the end of file if <em>length</em> is omitted or is <tt>nil</tt>. <em>length</em> must be a non-negative integer or nil. If the optional <em>buffer</em> argument is present, it must reference a String, which will receive the data. - !ruby/struct:SM::Flow::P body: At end of file, it returns <tt>nil</tt> or <tt>""</tt> depend on <em>length</em>. <tt><em>ios</em>.read()</tt> and <tt><em>ios</em>.read(nil)</tt> returns <tt>""</tt>. <tt><em>ios</em>.read(<em>positive-integer</em>)</tt> returns nil. - !ruby/struct:SM::Flow::VERB body: " f = File.new("testfile")\n f.read(16) #=> "This is line one"\n" full_name: IO#read is_singleton: false name: read params: | ios.read([length [, buffer]]) => string, buffer, or nil visibility: public