Module: SqaDemo::Sinatra::Helpers::Formatting

Defined in:
lib/sqa_demo/sinatra/helpers/formatting.rb

Instance Method Summary collapse

Instance Method Details

#find_extremes(stocks_data, key, higher_is_better) ⇒ Object

Find best/worst tickers for a given metric



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# File 'lib/sqa_demo/sinatra/helpers/formatting.rb', line 47

def find_extremes(stocks_data, key, higher_is_better)
  return [nil, nil] if higher_is_better.nil?

  values = stocks_data.map { |t, d| [t, d[key]] }.reject { |_, v| v.nil? }
  return [nil, nil] if values.empty?

  sorted = values.sort_by { |_, v| v }
  if higher_is_better
    [sorted.last[0], sorted.first[0]]  # best is highest, worst is lowest
  else
    [sorted.first[0], sorted.last[0]]  # best is lowest, worst is highest
  end
end

#format_compare_value(value, format_type) ⇒ Object

Format comparison value based on type



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# File 'lib/sqa_demo/sinatra/helpers/formatting.rb', line 20

def format_compare_value(value, format_type)
  return '-' if value.nil?

  case format_type
  when :currency
    sprintf('$%.2f', value)
  when :currency_billions
    sprintf('$%.2fB', value / 1_000_000_000.0)
  when :percent
    sprintf('%.2f%%', value)
  when :percent_sign
    prefix = value >= 0 ? '+' : ''
    "#{prefix}#{sprintf('%.2f', value)}%"
  when :percent_from_decimal
    sprintf('%.1f%%', value * 100)
  when :decimal2
    sprintf('%.2f', value)
  when :decimal3
    sprintf('%.3f', value)
  when :number
    value.to_s.reverse.gsub(/(\d{3})(?=\d)/, '\\1,').reverse
  else
    value.to_s
  end
end

#format_currency(value) ⇒ Object 



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# File 'lib/sqa_demo/sinatra/helpers/formatting.rb', line 11

def format_currency(value)
  sprintf("$%.2f", value)
end

#format_number(value) ⇒ Object 



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# File 'lib/sqa_demo/sinatra/helpers/formatting.rb', line 15

def format_number(value)
  value.to_s.reverse.gsub(/(\d{3})(?=\d)/, '\\1,').reverse
end

#format_percent(value) ⇒ Object 



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# File 'lib/sqa_demo/sinatra/helpers/formatting.rb', line 7

def format_percent(value)
  sprintf("%.2f%%", value)
end