класс Numeric
Константы
- Эксабайт
- Гигабайт
- Килобайт
- Мегабайт
- Петабайт
- Терабайт
Методы публичного экземпляра
Лучше всего читается без аргументов: 10.minutes.ago
# File activesupport/lib/active_support/core_ext/numeric/time.rb, line 65 def ago(time = ::Time.current) ActiveSupport::Deprecation.warn "Calling #ago or #until on a number (e.g. 5.ago) is deprecated and will be removed in the future, use 5.seconds.ago instead" time - self end
Позволяет использовать вычисления и объявления байтов, такие как 45.bytes + 2.6.megabytes
# File activesupport/lib/active_support/core_ext/numeric/bytes.rb, line 10 def bytes self end
# File activesupport/lib/active_support/core_ext/numeric/time.rb, line 49 def days ActiveSupport::Duration.new(self * 24.hours, [[:days, self]]) end
Числа не дублируются:
3.duplicable? # => false 3.dup # => TypeError: can't dup Fixnum
# File activesupport/lib/active_support/core_ext/object/duplicable.rb, line 74 def duplicable? false end
# File activesupport/lib/active_support/core_ext/numeric/bytes.rb, line 40 def exabytes self * EXABYTE end
# File activesupport/lib/active_support/core_ext/numeric/time.rb, line 59 def fortnights ActiveSupport::Duration.new(self * 2.weeks, [[:days, self * 14]]) end
Лучше всего читается без аргументов: 10.minutes.from_now
# File activesupport/lib/active_support/core_ext/numeric/bytes.rb, line 25 def gigabytes self * GIGABYTE end
# File activesupport/lib/active_support/core_ext/numeric/time.rb, line 44 def hours ActiveSupport::Duration.new(self * 3600, [[:seconds, self * 3600]]) end
# File activesupport/lib/active_support/core_ext/string/output_safety.rb, line 118 def html_safe? true end
Используется со стандартными временными интервалами, например, 1.hour.in_milliseconds – так что мы можем передавать их в функции JavaScript, такие как getTime().
# File activesupport/lib/active_support/core_ext/numeric/time.rb, line 84 def in_milliseconds self * 1000 end
# File activesupport/lib/active_support/core_ext/numeric/bytes.rb, line 15 def kilobytes self * KILOBYTE end
# File activesupport/lib/active_support/core_ext/numeric/bytes.rb, line 20 def megabytes self * MEGABYTE end
# File activesupport/lib/active_support/core_ext/numeric/time.rb, line 39 def minutes ActiveSupport::Duration.new(self * 60, [[:seconds, self * 60]]) end
# File activesupport/lib/active_support/core_ext/numeric/bytes.rb, line 35 def petabytes self * PETABYTE end
Позволяет использовать вычисления и объявления времени, такие как 45.minutes + 2.hours + 4.years.
Эти методы используют Time#advance для точных вычислений дат при использовании #from_now, ago и т. д., а также для добавления или вычитания их результатов из объекта Time. Например:
# equivalent to Time.current.advance(months: 1) 1.month.from_now # equivalent to Time.current.advance(years: 2) 2.years.from_now # equivalent to Time.current.advance(months: 4, years: 5) (4.months + 5.years).from_now
Хотя эти методы обеспечивают точные вычисления при использовании в приведенных выше примерах, следует учитывать, что это не так, если результат `months`, `years` и т. д. преобразуется перед использованием:
# equivalent to 30.days.to_i.from_now 1.month.to_i.from_now # equivalent to 365.25.days.to_f.from_now 1.year.to_f.from_now
В таких случаях для точного арифметического вычисления дат и времени следует использовать базовые методы Ruby Date и Time.
# File activesupport/lib/active_support/core_ext/numeric/time.rb, line 34 def seconds ActiveSupport::Duration.new(self, [[:seconds, self]]) end
Лучше всего читается с аргументом: 10.minutes.since(time)
# File activesupport/lib/active_support/core_ext/numeric/time.rb, line 74 def since(time = ::Time.current) ActiveSupport::Deprecation.warn "Calling #since or #from_now on a number (e.g. 5.since) is deprecated and will be removed in the future, use 5.seconds.since instead" time + self end
# File activesupport/lib/active_support/core_ext/numeric/bytes.rb, line 30 def terabytes self * TERABYTE end
Предоставляет варианты для преобразования чисел в отформатированные строки. Предоставляются параметры для телефонных номеров, валюты, процентов, точности, позиционной нотации, размера файла и красивой печати.
Параметры
Подробную информацию о том, какие форматы используют какие параметры, см. в ActiveSupport::NumberHelper
Примеры
Phone Numbers:
5551234.to_s(:phone) # => 555-1234
1235551234.to_s(:phone) # => 123-555-1234
1235551234.to_s(:phone, area_code: true) # => (123) 555-1234
1235551234.to_s(:phone, delimiter: ' ') # => 123 555 1234
1235551234.to_s(:phone, area_code: true, extension: 555) # => (123) 555-1234 x 555
1235551234.to_s(:phone, country_code: 1) # => +1-123-555-1234
1235551234.to_s(:phone, country_code: 1, extension: 1343, delimiter: '.')
# => +1.123.555.1234 x 1343
Currency:
1234567890.50.to_s(:currency) # => $1,234,567,890.50
1234567890.506.to_s(:currency) # => $1,234,567,890.51
1234567890.506.to_s(:currency, precision: 3) # => $1,234,567,890.506
1234567890.506.to_s(:currency, locale: :fr) # => 1 234 567 890,51 €
-1234567890.50.to_s(:currency, negative_format: '(%u%n)')
# => ($1,234,567,890.50)
1234567890.50.to_s(:currency, unit: '£', separator: ',', delimiter: '')
# => £1234567890,50
1234567890.50.to_s(:currency, unit: '£', separator: ',', delimiter: '', format: '%n %u')
# => 1234567890,50 £
Percentage:
100.to_s(:percentage) # => 100.000%
100.to_s(:percentage, precision: 0) # => 100%
1000.to_s(:percentage, delimiter: '.', separator: ',') # => 1.000,000%
302.24398923423.to_s(:percentage, precision: 5) # => 302.24399%
1000.to_s(:percentage, locale: :fr) # => 1 000,000%
100.to_s(:percentage, format: '%n %') # => 100 %
Delimited:
12345678.to_s(:delimited) # => 12,345,678
12345678.05.to_s(:delimited) # => 12,345,678.05
12345678.to_s(:delimited, delimiter: '.') # => 12.345.678
12345678.to_s(:delimited, delimiter: ',') # => 12,345,678
12345678.05.to_s(:delimited, separator: ' ') # => 12,345,678 05
12345678.05.to_s(:delimited, locale: :fr) # => 12 345 678,05
98765432.98.to_s(:delimited, delimiter: ' ', separator: ',')
# => 98 765 432,98
Rounded:
111.2345.to_s(:rounded) # => 111.235
111.2345.to_s(:rounded, precision: 2) # => 111.23
13.to_s(:rounded, precision: 5) # => 13.00000
389.32314.to_s(:rounded, precision: 0) # => 389
111.2345.to_s(:rounded, significant: true) # => 111
111.2345.to_s(:rounded, precision: 1, significant: true) # => 100
13.to_s(:rounded, precision: 5, significant: true) # => 13.000
111.234.to_s(:rounded, locale: :fr) # => 111,234
13.to_s(:rounded, precision: 5, significant: true, strip_insignificant_zeros: true)
# => 13
389.32314.to_s(:rounded, precision: 4, significant: true) # => 389.3
1111.2345.to_s(:rounded, precision: 2, separator: ',', delimiter: '.')
# => 1.111,23
Human-friendly size in Bytes:
123.to_s(:human_size) # => 123 Bytes
1234.to_s(:human_size) # => 1.21 KB
12345.to_s(:human_size) # => 12.1 KB
1234567.to_s(:human_size) # => 1.18 MB
1234567890.to_s(:human_size) # => 1.15 GB
1234567890123.to_s(:human_size) # => 1.12 TB
1234567.to_s(:human_size, precision: 2) # => 1.2 MB
483989.to_s(:human_size, precision: 2) # => 470 KB
1234567.to_s(:human_size, precision: 2, separator: ',') # => 1,2 MB
1234567890123.to_s(:human_size, precision: 5) # => "1.1229 TB"
524288000.to_s(:human_size, precision: 5) # => "500 MB"
Human-friendly format:
123.to_s(:human) # => "123"
1234.to_s(:human) # => "1.23 Thousand"
12345.to_s(:human) # => "12.3 Thousand"
1234567.to_s(:human) # => "1.23 Million"
1234567890.to_s(:human) # => "1.23 Billion"
1234567890123.to_s(:human) # => "1.23 Trillion"
1234567890123456.to_s(:human) # => "1.23 Quadrillion"
1234567890123456789.to_s(:human) # => "1230 Quadrillion"
489939.to_s(:human, precision: 2) # => "490 Thousand"
489939.to_s(:human, precision: 4) # => "489.9 Thousand"
1234567.to_s(:human, precision: 4,
significant: false) # => "1.2346 Million"
1234567.to_s(:human, precision: 1,
separator: ',',
significant: false) # => "1,2 Million" # File activesupport/lib/active_support/core_ext/numeric/conversions.rb, line 100
def to_formatted_s(format = :default, options = {})
case format
when :phone
return ActiveSupport::NumberHelper.number_to_phone(self, options)
when :currency
return ActiveSupport::NumberHelper.number_to_currency(self, options)
when :percentage
return ActiveSupport::NumberHelper.number_to_percentage(self, options)
when :delimited
return ActiveSupport::NumberHelper.number_to_delimited(self, options)
when :rounded
return ActiveSupport::NumberHelper.number_to_rounded(self, options)
when :human
return ActiveSupport::NumberHelper.number_to_human(self, options)
when :human_size
return ActiveSupport::NumberHelper.number_to_human_size(self, options)
else
self.to_default_s
end
end # File activesupport/lib/active_support/core_ext/numeric/time.rb, line 54 def weeks ActiveSupport::Duration.new(self * 7.days, [[:days, self * 7]]) end
© 2004–2016 David Heinemeier Hansson
Licensed under the MIT License.