Ruby - Read an I/O stream line by line using gets

Description

Read an I/O stream line by line using gets

Demo

File.open("main.rb") do |f| 
  2.times { puts f.gets } 
end

Result

gets isn't an iterator like each or each_byte.

You have to call it multiple times to get multiple lines.

Here, it was used twice, and pulled out the first two lines of the example file.

gets can accept an optional delimiter:

Demo

File.open("main.rb") do |f| 
  2.times { puts f.gets(',') } 
end

Result

The following code uses a noniterative version of each_byte called getc:

Demo

File.open("main.rb") do |f| 
  2.times { puts f.getc } 
end

Result

getc returns the actual character in a string rather than the numerical byte value.

Related Topic

• Output text file line by line
• Count text file line
• Read whole text file to memory
• Count Text File Characters
• Count characters excluding whitespace
• Counting Words in Text File
• Counting Sentences and Paragraphs in Text file
• Standard Input and Output
• Text Files Reading
• Split file by ,
• Output file byte by type
• Read text file character by character
• Read entire file into an array, split by lines, using readlines
• Read an arbitrary number of bytes from a file
• Reading text file line by line using each
• Read file in UTF8
• Transcoding from one encoding to another encoding.

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