Ruby - Read file in UTF8

Introduction

To read a file that uses the UTF-8 encoding scheme:

Demo

File.new("main.rb", "r:utf-8").each { |line| puts line }

Result

Here, we're reading a file in the UTF-8 encoding.

To determine the external encoding of an I/O object using its external_encoding method:

Demo

puts File.open("main.rb", "r:utf-8").external_encoding 
puts File.open("main.rb", "r").external_encoding

Result

If your default encoding is not US-ASCII, the second line will return whatever your default encoding actually is.

Related Topic

• Output text file line by line
• 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
• Transcoding from one encoding to another encoding.

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