Class: Neovim::Calculator

Inherits:
Object show all
Defined in:
lib/neovim/tools/calculator.rb

Instance Method Summary collapse

Instance Method Details

#add(line) ⇒ Object 



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# File 'lib/neovim/tools/calculator.rb', line 38

def add line
  line = line.chomp
  line.slice! /#.*/
  if $& =~ /!(\w+)/ then
    case $1
      when "c", "comma", "k", "komma" then comma!
      when "d", "dot", "p", "point"   then dot!
      when /\A\d+\z/                  then @decs = $1.to_i
    end
  end
  line.slice! /^.*:/
  line.strip!
  line.notempty? or return

  products = []
  line.split /(?<![,.])[+-]/ do |p|
    products.push [ (split_products p), $& == "-"]
  end

  minus = false
  products.each { |p,nm|
    if not @result then @result =  p
    elsif minus    then @result -= p
    else                @result += p
    end
    minus = nm
  }
  @result
end

#comma! ⇒ Object 



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# File 'lib/neovim/tools/calculator.rb', line 34

def comma! ; @sep, @grp = ",", "." ; end

#comma? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/neovim/tools/calculator.rb', line 36

def comma? ; @sep == "," ; end

#decs=(d) ⇒ Object 



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# File 'lib/neovim/tools/calculator.rb', line 31

def decs= d ; @decs = Integer d ; end

#dot! ⇒ Object 



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# File 'lib/neovim/tools/calculator.rb', line 33

def dot!   ; @sep, @grp = ".", "," ; end

#dot? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/neovim/tools/calculator.rb', line 35

def dot?   ; @sep == "." ; end

#reset! ⇒ Object 



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# File 'lib/neovim/tools/calculator.rb', line 27

def reset!
  @result = nil
end

#result ⇒ Object 



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# File 'lib/neovim/tools/calculator.rb', line 13

def result
  r = @result.round @decs
  case r
  when BigDecimal then
    r = r.to_s "F"
    r.sub! /(?:(\.)([0-9]+))?\z/ do
      (@sep||$1) + ($2.to_s.ljust @decs, "0")
    end
  when Integer    then
    r = r.to_s
  end
  r
end