Web Reference: Dec 9, 2019 · include? is a String class method in Ruby which is used to return true if the given string contains the given string or character. Syntax: str.include? Parameters: Here, str is the given string. Returns: true if the given string contains the given string or character otherwise false. Example 1: May 5, 2020 · Open the terminal/commmand prompt on your computer and type to bring up a Ruby prompt (you likley knew this, I'm just sharing it in case it helps). You want to cycle through each of your vowels and check each individually to see if it's included, and if it is, update the result to true. If you want to write a non-back-reference string \& in replacement, you need to first escape the backslash to prevent this method from interpreting it as a back-reference, and then you need to escape the backslashes again to prevent a string literal from consuming them: "..\\\\&..".
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