class Archive

This class provides a useful object to store the command history of linmeric

Author: Massimiliano Dal Mas (max.codeware@gmail.com)
License: Distributed under MIT license

Public Class Methods

new() click to toggle source

Creates a new Archive objects

# File lib/linmeric/Archive.rb, line 12
def initialize
  @myArray = []
  @i = 0
end

Public Instance Methods

next_() click to toggle source

Returns the next item compared to the pointer position

returns: saved object; “” if the pointer is already at the

end of the Archive

# File lib/linmeric/Archive.rb, line 51
def next_
  if  @i < (@myArray.size - 1) 
    @i += 1
    return @myArray[@i].clone
  else
    @i = @myArray.size
    return ""
  end
  @i = @myArray.size
  return ""
end

previous() click to toggle source

Returns the previous item compared to the pointer position

returns: saved object; “” if the pointer is already at the

beginning of the archive

# File lib/linmeric/Archive.rb, line 35
def previous
  if not @i == 0 then
    @i -= 1
    return @myArray[@i].clone
  else
    @i = 0
    return ""
  end
  @i = 0
  return ""
end

store(str) click to toggle source

Adds a new item to the archive (it keeps the last 20 items which have been inserted).

argument: item to be added (mainly a String)

# File lib/linmeric/Archive.rb, line 21
def store(str)
  if @myArray.size == 20
    @myArray = @myArray[1...@myArray.size] + [str]
    # @i = @myArray.size
  else
    @myArray[@myArray.size] = str
    @i = @myArray.size
  end
end

top() click to toggle source

Moves the pointer to the top of the archive (the last element inserted)

# File lib/linmeric/Archive.rb, line 64
def top
  @i = @myArray.size
end