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How to use the encoding class in Ruby
okwudili onyejiaku
Overview
The Encoding instance represents any character encoding in Ruby.
In Ruby, texts are encoded in UTF-8 by default. This is because UTF-8 is a multi-byte character encoding that allows a single character to take up between 1 and 4 bytes. Other encodings, such as UTF-7, UCS-2, UTF-16, etc., are also present. Even if the default encoding of all strings or texts in Ruby is UFT-8, we can convert it from one encoding to another.
The name_list property of the Encoding class retrieves the list of all available encoding names.
Syntax
Encoding.name_list
Return value
The name_list property of the Encoding class returns a list of available encoding names.
Example
An example of using the name_list property of the Encoding class is as follows:
# Print the available encodings
puts "#{Encoding.name_list}"
# Create a string
str1 = "Welcome to Edpresso!"
# Get its encoding
puts "#{str1} encoding is : #{str1.encoding.name}"Using the name_list property
Explanation
- Line 2: We print all available encodings.
- Wine 5: We create a string.
- Line 8: We get the encoding of the string we created.
# Create a string
str2 = "Welcome to Edpresso"
# Print the default encoding
puts str2.encoding.name # UTF-8
# Change the encoding
str2.force_encoding("US-ASCII")
# Reprint the encoding
puts str2.encoding.name # US-ASCIIConverting a string from its default encoding to another in Ruby
Explanation
- Line 2: We create a string.
- Line 5: We printed the default encoding name of the string,
UFT-8. - Line 8: We using
force_encodingto change the encoding of the string to another one. - Line 11: We print the new encoding to the console screen.
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