Class: LLM::Repl::Walker

Inherits:
Object
  • Object
show all
Defined in:
lib/llm/repl/walker.rb

Overview

Walks through an array from the last element backward, one step at a time. #next moves forward toward the end. Both methods clamp at the array boundaries.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(items) ⇒ Walker

Returns a new instance of Walker.

Parameters:

  • items (Array) 


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# File 'lib/llm/repl/walker.rb', line 15

def initialize(items)
  @items = items
  @cursor = items.size
end

Instance Attribute Details

#cursor=(value) ⇒ Object (writeonly)

Sets the cursor position



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# File 'lib/llm/repl/walker.rb', line 11

def cursor=(value)
  @cursor = value
end

Instance Method Details

#next ⇒ Object?

Returns:



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# File 'lib/llm/repl/walker.rb', line 22

def next
  if @items.empty?
    nil
  elsif @cursor >= @items.size - 1
    @items[@cursor]
  else
    @cursor += 1
    @items[@cursor]
  end
end

#prev ⇒ Object?

Returns:



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# File 'lib/llm/repl/walker.rb', line 35

def prev
  if @items.empty?
    nil
  elsif @cursor <= 0
    @items[@cursor]
  else
    @cursor -= 1
    @items[@cursor]
  end
end