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✏️ 正在编辑: ungetc-i.yaml
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/opt/alt/ruby18/share/ri/1.8/system/IO/ungetc-i.yaml
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--- !ruby/object:RI::MethodDescription aliases: [] block_params: comment: - !ruby/struct:SM::Flow::P body: Pushes back one character (passed as a parameter) onto <em>ios</em>, such that a subsequent buffered read will return it. Only one character may be pushed back before a subsequent read operation (that is, you will be able to read only the last of several characters that have been pushed back). Has no effect with unbuffered reads (such as <tt>IO#sysread</tt>). - !ruby/struct:SM::Flow::VERB body: " f = File.new("testfile") #=> #<File:testfile>\n c = f.getc #=> 84\n f.ungetc(c) #=> nil\n f.getc #=> 84\n" full_name: IO#ungetc is_singleton: false name: ungetc params: | ios.ungetc(integer) => nil visibility: public
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