Text File Writer Assignment

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Background

Ensure

Ruby provides begin/rescue/ensure which is rather analogous to try/catch/finally in Java.

note: although coincidental, it is rather fitting that this reference covers begin/rescue/ensure with ensuring to close an opened file as its example. Ensuring to close an opened file is the canonical example for this sort of feature.

Yield

yield

Code To Implement

TextFileUtils

file: src/main/ruby/text_file_utils/text_file_utils.rb Ruby logo.svg
class: TextFileUtils
superclass: Object
methods: write_text(path)

write_text(path)

Create a new File for the specified path in write mode.

If a block is given, yield the file to that block and ensure that you close the file. Return the closed file.

If no block is given, return the opened file.

Client

file to run: src/main/ruby/text_file_utils/text_file_utils.rb Ruby logo.svg
TextFileUtils.write_text(path) do |file|
  file.write("<html><body><h1>#{Time.now}</h1></body></html>")
end