Check if string contains any substring in an array in Ruby

Question

I am using the Tmail library, and for each attachment in an email, when I do attachment.content_type, sometimes I get not just the content type but also the name. Examples:

image/jpeg; name=example3.jpg  image/jpeg; name=example.jpg  image/jpeg; name=photo.JPG  image/png 

I have an array of valid content types like this:

VALID_CONTENT_TYPES = ['image/jpeg'] 

I would like to be able to check if the content type is included in any of the valid content types array elements.

What would be the best way of doing so in Ruby?

Answer 1

There are multiple ways to accomplish that. You could check each string until a match is found using Enumerable#any?:

str = "alo eh tu" ['alo','hola','test'].any? { |word| str.include?(word) } 

Though it might be faster to convert the array of strings into a Regexp:

words = ['alo','hola','test'] r = /#{words.join("|")}/ # assuming there are no special chars r === "alo eh tu"