Class: Factbase::Concat

Inherits:

TermBase

• Object
• TermBase
• Factbase::Concat

Defined in:

lib/factbase/terms/concat.rb

Overview

Concat term.

Author

Yegor Bugayenko (yegor256@gmail.com)

Copyright

Copyright (c) 2024-2026 Yegor Bugayenko

License

MIT

Instance Method Summary

• #evaluate(fact, maps, fb) ⇒ String

  Evaluate term on a fact.

• #initialize(operands) ⇒ Concat constructor

  A new instance of Concat.

Constructor Details

#initialize(operands) ⇒ Concat

Returns a new instance of Concat.

# File 'lib/factbase/terms/concat.rb', line 13

def initialize(operands)
  super()
  @operands = operands
end

Instance Method Details

#evaluate(fact, maps, fb) ⇒ String

Evaluate term on a fact.

Parameters:

• fact (Factbase::Fact) —

  The fact

• maps (Array<Factbase::Fact>) —

  All maps available

• fb (Factbase) —

  Factbase to use for sub-queries

Returns:

• (String) —

  The concatenated string

# File 'lib/factbase/terms/concat.rb', line 23

def evaluate(fact, maps, fb)
  (0..(@operands.length - 1)).map { |i| _values(i, fact, maps, fb)&.first }.join
end