How to read whole file in Ruby?

RubyFile

Ruby Problem Overview

Is there an in-built function in Ruby to read the whole file without using any loop? So far, I have only come across methods that read in chunks (line or character).

Ruby Solutions

Solution 1 - Ruby

IO.read("filename")

or

File.read("filename")

Solution 2 - Ruby

File.readlines("filename")

This is also a great method to read everything from a file and break split on carriage returns. The return is an Array with one line per element.

Solution 3 - Ruby

Please ignore advice which states "You should never slurp (which is the annoying term for this) a file". Sometimes this is a very useful, and sensible thing to do.

Suppose you're reading a file repeatedly : good chance that reading the file into an array is a sensible optimisation over reading the file line by line, even taking into account that the o/s will cache the file.

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Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionShubhamView Question on Stackoverflow
Solution 1 - RubysluukkonenView Answer on Stackoverflow
Solution 2 - RubyNickView Answer on Stackoverflow
Solution 3 - RubyGraham NichollsView Answer on Stackoverflow