Class: Array2dSimple::Array2d

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/array_2d_simple/array_2d.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(params) ⇒ Array2d

Returns a new instance of Array2d.



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# File 'lib/array_2d_simple/array_2d.rb', line 8

def initialize params
  raise 'width must be set' unless params[:width]
  raise 'height must be set' unless params[:height]

  params.each do |key,value|
    instance_variable_set("@#{key}",value)
  end
  @elements = Array.new(@height){ Array.new(@width) }
end

Instance Attribute Details

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/array_2d_simple/array_2d.rb', line 6

def height
  @height
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/array_2d_simple/array_2d.rb', line 6

def width
  @width
end

Instance Method Details

#[](x, y) ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 44

def [] x,y
  get_by_xy(x,y)
end

#[]=(x, y, value) ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 48

def []= x,y, value
  set_by_xy(x,y,value)
end

#each(&block) ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 98

def each &block
  each_with_index &block
end

#each_with_index ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 90

def each_with_index
  (0..@width - 1).each do |y|
    (0..@height - 1).each do |x|
      yield(@elements[x][y],[x,y])
    end
  end
end

#format2(value) ⇒ Object

Helper methods



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# File 'lib/array_2d_simple/array_2d.rb', line 103

def format2 value
  "%0.2f" % value.round(2).to_s if value.finite?
end

#get_by_rc(r, c) ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 22

def get_by_rc r,c
  Printer.log 'Warning: #get_by_rc is depricated. Use get_by_xy. Note: arguments are reversed with get_by_xy'
  get_by_xy(c,r)
end

#get_by_xy(x, y) ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 32

def get_by_xy x,y
  raise 'x out of range' if x >= @width
  raise 'y out of range' if y >= @height
  @elements[y][x]
end

#max ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 66

def max
  @elements.dup.flatten.max
end

#min ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 70

def min
  @elements.dup.flatten.min
end

#output ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 52

def output
  size = format2(max.to_f).size
  output = ''
  
  (0..@height - 1).each do |r|
    (0..@width - 1).each do |c|
      output += "%#{ size + 4 }s" % format2(get_by_rc(r,c).to_f) if get_by_rc(r,c).respond_to? :to_f
    end
    output += "\n"
  end

  output
end

#project(&proc) ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 74

def project &proc
  new_array = self.class.new( width: @width, height: @height )
  
  new_array.set_each{ |x, y| proc.call( get_by_xy( y,x ))}

  new_array
end

#set_by_rc(r, c, value) ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 27

def set_by_rc r,c, value
  Printer.log 'Warning: #set_by_rc is depricated. Use set_by_xy. Note: arguments are reversed with set_by_xy'
  set_by_xy(c,r,value)
end

#set_by_xy(x, y, value) ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 38

def set_by_xy(x,y,value)
  raise 'x out of range' if x >= @width
  raise 'y out of range' if y >= @height
  @elements[y][x] = value
end

#set_each(&proc) ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 82

def set_each &proc
  each_with_index do |v,i| 
    x = i[0]
    y = i[1]
    @elements[x][y] = proc.call(x,y)
  end
end

#to_s ⇒ Object 



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# File 'lib/array_2d_simple/array_2d.rb', line 18

def to_s
  "#{ self.class }: #{ @width }x#{ @height }"
end