Finding multiple patterns in a string in Ruby

Question

I am trying to find strings in an array that match multiple regular expression patterns. I figured out how to do this for one pattern as below:

spamWords = Regexp.new("Delighted")

spamCount1 = 0
spamArray.each do |word|
  if word =~ spamWords
    spamCount1 +=1
  end
end
p spamCount1

I iterated over an array of spamWord strings, but I was wondering if there is a simpler way of doing this.

If you just want to count rather than get the matches, then you should do: smapArray.count(&spamWords.method(:=~)). — sawa
– sawa, Commented Nov 21, 2018 at 3:28

Tom Lord · Accepted Answer · 2018-11-20 13:09:43Z

2

You can union multiple patterns into one regular expression, then perform the search exactly like you did below:

spamWords = Regexp.new("Delighted|Saddened")

You can also use Regexp.union to auto-generate this regexp for you:

spamWords = Regexp.union("Delighted", "Saddened")

answered Nov 20, 2018 at 13:09

Tom Lord

28.4k5 gold badges54 silver badges86 bronze badges

Sign up to request clarification or add additional context in comments.

1 Answer 1