File.open with block (auto-close) in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to open a file named 'example.txt' for reading.

Ruby

File.[1]('example.txt') do |file|
  puts file.read
end

Drag options to blanks, or click blank then click option'

Aopen

Bread

Cwrite

Dclose

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'read' instead of 'open' as the method name.

Trying to manually close the file inside the block.

The File.open method opens the file and allows you to work with it inside the block.

2fill in blank

medium

Complete the code to open 'data.txt' for writing inside a block.

Ruby

File.open('data.txt', [1]) do |file|
  file.puts 'Hello, world!'
end

Drag options to blanks, or click blank then click option'

A'r'

B'a'

C'w'

D'x'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'r' which is for reading only.

Using 'a' which appends instead of overwriting.

The mode 'w' opens the file for writing, creating or truncating it.

3fill in blank

hard

Fix the error in the code to properly open and auto-close 'log.txt' for appending.

Ruby

File.open('log.txt', [1]) do |file|
  file.puts 'New entry'
end

Drag options to blanks, or click blank then click option'

A'r'

B'rw'

C'w'

D'a'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'w' which overwrites the file.

Using 'r' which does not allow writing.

The mode 'a' opens the file for appending, adding content at the end.

4fill in blank

hard

Fill both blanks to open 'notes.txt' for reading and print its content line by line.

Ruby

File.open('notes.txt', [1]) do |file|
  file.[2] do |line|
    puts line
  end
end

Drag options to blanks, or click blank then click option'

A'r'

Breadlines

Ceach_line

D'w'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'w' mode which is for writing.

Using 'readlines' which returns an array instead of iterating.

Open the file in read mode 'r' and use each_line to iterate over each line.

5fill in blank

hard

Fill all three blanks to open 'output.txt' for writing, write a line, and automatically close the file.

Ruby

File.[1]('output.txt', [2]) do |file|
  file.[3] 'This is a test.'
end

Drag options to blanks, or click blank then click option'

Aopen

B'w'

Cputs

Dread

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'read' instead of 'puts' to write.

Using mode 'r' which is for reading.

Use File.open with mode 'w' to write, and puts to write a line.