Ruby - Output text file line by line

Introduction

If text.txt is in the current directory, the result is the entire text file.

Demo

File.open("main.rb").each { |line| puts line }

Result

Edit the code to the follows:

Demo

line_count = 0 
File.open("main.rb").each { |line| line_count += 1 } 
puts line_count

Result

Here, you initialize line_count to store the line count.

Then open the file and iterate over each line while incrementing line_count by 1 each time.

When you're done, you print the total to the screen.

Related Topics

• 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 an I/O stream line by line using gets
• 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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