Dentaku Search

gistfile1.rb

c = Dentaku::Calculator.new

c.add_function(
    name: :blank,
    type: :logical,
    signature: [:non_group],
    body: ->(var) {
    ap "Value: #{var}"
      return (var.to_s.strip.empty?)
    }   
  )


c.evaluate("BLANK(foo)", foo: nil)

# SEARCH 
c = Dentaku::Calculator.new
c.add_function(
    name: :search,
    type: :logical,
    signature: [:string, :string],
    body: ->(needle, haystack) {
      return false if needle.nil? || haystack.nil?
      return false unless needle.is_a?(String) && haystack.is_a?(String)

      found = false
      if needle.include?("%")
        value_without_wildcards = needle.gsub("%", "") 

        if needle.start_with?("%") && needle.end_with?("%")
          found = haystack.include?(value_without_wildcards)
        elsif needle.end_with?("%")
          found = haystack.index(value_without_wildcards) == 0
        elsif needle.start_with?("%")
          found = !!(haystack =~ /#{value_without_wildcards}$/)
        end 
      else
        found = haystack.include?(needle)
      end 

      return found
    }   
  )

c.evaluate("SEARCH(needle, haystack)", needle: "str", haystack: "string")