LANGUAGE » RUBY

String

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Basic

To make strings immutable (recommended), add this the first line of the script:

ruby

# frozen_string_literal: true

Instantiation:

ruby

my_string = 'Taro'
interpolation = "Hello, #{name}"
my_string << 'concatenate me'

To escape # within a double-quoted string:

ruby

text = "Your ID is \##{user_id}"

ruby

format('%.1f', 8.199)  # Preferred
sprintf('%.1f', 8.199)

Method	Description
`length`	Get the length of string.
`empty?`	Returns `true` if string is empty.
`reverse`	Reverse order of characters.
`upcase`	Change all characters to upper case.
`downcase`	Change all characters to lower case.
`capitalize`	Capitalize Every Word This Way.
`gsub`	Global substitution.
`include?`	Returns `true` if string includes substring.
`split`	Split string by the specified separator.

Replace all s with th:

ruby

my_string.gsub(/s/, 'th')

Check if string includes substring:

ruby

my_string.include? 'substring'

Split string by space (default):

ruby

words_array = my_string.split(' ')