Class: Klam::Absvector

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/klam/absvector.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(n_or_array, fill = nil) ⇒ Absvector

Returns a new instance of Absvector.



6
7
8
9
10
11
12
13
14
15
16
17
 
# File 'lib/klam/absvector.rb', line 6

def initialize(n_or_array, fill = nil)
  if n_or_array.kind_of?(Array)
    # This is a convenience constructor for making Shen vectors from Ruby
    # Arrays. Shen vectors use 1-based indexing and store the size in
    # slot zero.
    @array = Array.new(n_or_array)
    @array.unshift(@array.size)
  else
    @array = Array.new(n_or_array, fill)
  end
    @size = @array.size
end

Instance Attribute Details

#array ⇒ Object (readonly)

Returns the value of attribute array.



4
5
6
 
# File 'lib/klam/absvector.rb', line 4

def array
  @array
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



4
5
6
 
# File 'lib/klam/absvector.rb', line 4

def size
  @size
end

Instance Method Details

#==(other) ⇒ Object 



45
46
47
48
 
# File 'lib/klam/absvector.rb', line 45

def ==(other)
  other.kind_of?(Klam::Absvector) && other.size == @size &&
    other.array == @array
end

#[](i) ⇒ Object 



19
20
21
22
23
24
 
# File 'lib/klam/absvector.rb', line 19

def [](i)
  if i < 0 || i >= @size
    raise Klam::Error, "index out of bounds: #{i}"
  end
  @array[i]
end

#each(&blk) ⇒ Object

In Shen, the data types that are implemented on top of absvectors use index 0 for auxilliary information. To ease interop scenarios, to_a and each are overridden to skip the first slot.



37
38
39
 
# File 'lib/klam/absvector.rb', line 37

def each(&blk)
  to_a.each(&blk)
end

#hash ⇒ Object 



50
51
52
 
# File 'lib/klam/absvector.rb', line 50

def hash
  @array.hash
end

#store(i, x) ⇒ Object 



26
27
28
29
30
31
32
 
# File 'lib/klam/absvector.rb', line 26

def store(i, x)
  if i < 0 || i >= @size
    raise Klam::Error, "index out of bounds: #{i}"
  end
  @array[i] = x
  self
end

#to_a ⇒ Object 



41
42
43
 
# File 'lib/klam/absvector.rb', line 41

def to_a
  @array[1..-1]
end