What is the file.each{} method in Ruby?

Overview

The each{} method of the file instance is used to get each line of the file content.

Syntax

Let's view the syntax of this method.

File.each {|line| }
Syntax for each{}

Parameters

line: This represents each line of the file content. It is provided by the each{} method.

Return value

Each line of the file content is returned.

Code example

Let's view a code example below.

main.rb
test.txt
# get file or create new file
f = File.new("test.txt")
# print each line
f.each {|line| puts "#{f.lineno}: #{line}"}

Explanation

  • Line 1: We create a file called test.txt and write some text to it.
  • Line 2: We get the file.
  • Line 5: We use the each{} method and f.lineno to print each line number and each line of the file, respectively.

Free AI Mock Interviews
Coding Interview
Coding PatternsFree Interview
Gain insights and practical experience with coding patterns through targeted MCQs and coding problems, designed to match and challenge your expertise level.
System Design
You TubeFree Interview
Learn to design a video streaming platform like YouTube by tackling functional and non-functional requirements, core components, and high-level to detailed design challenges.

Free Resources

License: Creative Commons-Attribution-ShareAlike 4.0 (CC-BY-SA 4.0)