Ruby - File File End

Introduction

eof? method from File object tells if the file reading reaches the file end:

Demo

f = File.new("test.txt", "r") 
catch(:end_of_file) do # ww  w . j  a  va 2s .com
  loop do 
    throw :end_of_file if f.eof? 
    puts f.gets 
  end 
end 
f.close

Result

Here, we use an "infinite" loop that you break out of by using catch and throw.

throw is only called if the file pointer is at or past the end of the file.

Related Topic

• File Open Mode
• File Name
• File Pointer Seeking
• File Last Modified Time
• File Exists
• File Size
• Using file mode
• Renaming and Deleting Files
• Wrap File object into you own class
• Get position Within a File
• Writing to Files
• Creating Temporary Files

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