Find Pattern

A loop can use pattern matching to find the first record with a matching shape.

find_pattern.rb

target = 
records = [[:info, "ready"], [:warn, "hot"], [:done, "ok"]]
message = "none"
found = false

records.each do |record|
  case record
  in [kind, text]
    if !found && kind == target
      message = text
      found = true
    end
  end
end

puts "target=#{target}"
puts "message=#{message}"

target = 
records = [[:info, "ready"], [:warn, "hot"], [:done, "ok"]]
message = "none"
found = false

records.each do |record|
  case record
  in [kind, text]
    if !found && kind == target
      message = text
      found = true
    end
  end
end

puts "target=#{target}"
puts "message=#{message}"

target = 
records = [[:info, "ready"], [:warn, "hot"], [:done, "ok"]]
message = "none"
found = false

records.each do |record|
  case record
  in [kind, text]
    if !found && kind == target
      message = text
      found = true
    end
  end
end

puts "target=#{target}"
puts "message=#{message}"

find pattern Pattern matching inside a small loop can stop when the desired record appears.