Method: Wordmap::Access.each

Defined in:
lib/wordmap/access.rb

.each(descriptors, indexes, vec_or_index, ltrim_regex, trace) ⇒ Object



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# File 'lib/wordmap/access.rb', line 87

def each(descriptors, indexes, vec_or_index, ltrim_regex, trace)
  unless block_given?
    return enum_for(
      __method__,
      descriptors,
      indexes,
      vec_or_index,
      ltrim_regex,
      trace
    )
  end

  case vec_or_index
  when NilClass, Integer
    descriptor = vec_or_index.nil? ? 'data' : "vec#{vec_or_index}"
    file, meta = descriptors[descriptor].values_at(:file, :meta)

    subtrace = nil

    if trace
      subtrace = []
      trace << [:each, descriptor, subtrace]
    end

    FileAccess.each_cell(file, meta: meta, trace: subtrace) { |cell|
      value = extract_value(cell, ltrim_regex)
      yield(value) unless value.empty?
    }
  when Symbol
    raise "Unknown index: #{vec_or_index}" unless indexes.key?(vec_or_index)

    subtrace = nil

    if trace
      subtrace = []
      trace << [:each, vec_or_index, subtrace]
    end

    indexes[vec_or_index].each(0, trace: subtrace) { |cell| yield(cell) }
    subtrace.replace(subtrace.flat_map { |v| v[2] }) if trace
  else
    raise 'Invalid value passed into each'
  end
end