Module | ActionView::Helpers::NumberHelper |
In: |
lib/action_view/helpers/number_helper.rb
|
Provides methods for converting numbers into formatted strings. Methods are provided for phone numbers, currency, percentage, precision, positional notation, file size and pretty printing.
Most methods expect a number argument, and will return it unchanged if can‘t be converted into a valid number.
DEFAULT_CURRENCY_VALUES | = | { :format => "%u%n", :negative_format => "-%u%n", :unit => "$", :separator => ".", :delimiter => ",", :precision => 2, :significant => false, :strip_insignificant_zeros => false } |
STORAGE_UNITS | = | [:byte, :kb, :mb, :gb, :tb].freeze |
DECIMAL_UNITS | = | {0 => :unit, 1 => :ten, 2 => :hundred, 3 => :thousand, 6 => :million, 9 => :billion, 12 => :trillion, 15 => :quadrillion, -1 => :deci, -2 => :centi, -3 => :mili, -6 => :micro, -9 => :nano, -12 => :pico, -15 => :femto}.freeze |
Formats a number into a currency string (e.g., $13.65). You can customize the format in the options hash.
Fields are <tt>%u</tt> for the currency, and <tt>%n</tt> for the number.
an hyphen to the formatted number given by <tt>:format</tt>). Accepts the same fields than <tt>:format</tt>, except <tt>%n</tt> is here the absolute value of the number.
number_to_currency(1234567890.50) # => $1,234,567,890.50 number_to_currency(1234567890.506) # => $1,234,567,890.51 number_to_currency(1234567890.506, :precision => 3) # => $1,234,567,890.506 number_to_currency(1234567890.506, :locale => :fr) # => 1 234 567 890,506 € number_to_currency(1234567890.50, :negative_format => "(%u%n)") # => ($1,234,567,890.51) number_to_currency(1234567890.50, :unit => "£", :separator => ",", :delimiter => "") # => £1234567890,50 number_to_currency(1234567890.50, :unit => "£", :separator => ",", :delimiter => "", :format => "%n %u") # => 1234567890,50 £
Pretty prints (formats and approximates) a number in a way it is more readable by humans (eg.: 1200000000 becomes "1.2 Billion"). This is useful for numbers that can get very large (and too hard to read).
See number_to_human_size if you want to print a file size.
You can also define you own unit-quantifier names if you want to use other decimal units (eg.: 1500 becomes "1.5 kilometers", 0.150 becomes "150 mililiters", etc). You may define a wide range of unit quantifiers, even fractional ones (centi, deci, mili, etc).
%u The quantifier (ex.: 'thousand') %n The number
number_to_human(123) # => "123" number_to_human(1234) # => "1.23 Thousand" number_to_human(12345) # => "12.3 Thousand" number_to_human(1234567) # => "1.23 Million" number_to_human(1234567890) # => "1.23 Billion" number_to_human(1234567890123) # => "1.23 Trillion" number_to_human(1234567890123456) # => "1.23 Quadrillion" number_to_human(1234567890123456789) # => "1230 Quadrillion" number_to_human(489939, :precision => 2) # => "490 Thousand" number_to_human(489939, :precision => 4) # => "489.9 Thousand" number_to_human(1234567, :precision => 4, :significant => false) # => "1.2346 Million" number_to_human(1234567, :precision => 1, :separator => ',', :significant => false) # => "1,2 Million"
Unsignificant zeros after the decimal separator are stripped out by default (set :strip_insignificant_zeros to false to change that):
number_to_human(12345012345, :significant_digits => 6) # => "12.345 Billion" number_to_human(500000000, :precision=>5) # => "500 Million"
You can also use your own custom unit quantifiers:
number_to_human(500000, :units => {:unit => "ml", :thousand => "lt"}) # => "500 lt"
If in your I18n locale you have:
distance: centi: one: "centimeter" other: "centimeters" unit: one: "meter" other: "meters" thousand: one: "kilometer" other: "kilometers" billion: "gazilion-distance"
Then you could do:
number_to_human(543934, :units => :distance) # => "544 kilometers" number_to_human(54393498, :units => :distance) # => "54400 kilometers" number_to_human(54393498000, :units => :distance) # => "54.4 gazilion-distance" number_to_human(343, :units => :distance, :precision => 1) # => "300 meters" number_to_human(1, :units => :distance) # => "1 meter" number_to_human(0.34, :units => :distance) # => "34 centimeters"
Formats the bytes in number into a more understandable representation (e.g., giving it 1500 yields 1.5 KB). This method is useful for reporting file sizes to users. You can customize the format in the options hash.
See number_to_human if you want to pretty-print a generic number.
number_to_human_size(123) # => 123 Bytes number_to_human_size(1234) # => 1.21 KB number_to_human_size(12345) # => 12.1 KB number_to_human_size(1234567) # => 1.18 MB number_to_human_size(1234567890) # => 1.15 GB number_to_human_size(1234567890123) # => 1.12 TB number_to_human_size(1234567, :precision => 2) # => 1.2 MB number_to_human_size(483989, :precision => 2) # => 470 KB number_to_human_size(1234567, :precision => 2, :separator => ',') # => 1,2 MB
Non-significant zeros after the fractional separator are stripped out by default (set :strip_insignificant_zeros to false to change that):
number_to_human_size(1234567890123, :precision => 5) # => "1.1229 TB" number_to_human_size(524288000, :precision=>5) # => "500 MB"
Formats a number as a percentage string (e.g., 65%). You can customize the format in the options hash.
number_to_percentage(100) # => 100.000% number_to_percentage(100, :precision => 0) # => 100% number_to_percentage(1000, :delimiter => '.', :separator => ',') # => 1.000,000% number_to_percentage(302.24398923423, :precision => 5) # => 302.24399% number_to_percentage(1000, :locale => :fr) # => 1 000,000%
Formats a number into a US phone number (e.g., (555) 123-9876). You can customize the format in the options hash.
number_to_phone(5551234) # => 555-1234 number_to_phone(1235551234) # => 123-555-1234 number_to_phone(1235551234, :area_code => true) # => (123) 555-1234 number_to_phone(1235551234, :delimiter => " ") # => 123 555 1234 number_to_phone(1235551234, :area_code => true, :extension => 555) # => (123) 555-1234 x 555 number_to_phone(1235551234, :country_code => 1) # => +1-123-555-1234 number_to_phone(1235551234, :country_code => 1, :extension => 1343, :delimiter => ".") => +1.123.555.1234 x 1343
Formats a number with grouped thousands using delimiter (e.g., 12,324). You can customize the format in the options hash.
number_with_delimiter(12345678) # => 12,345,678 number_with_delimiter(12345678.05) # => 12,345,678.05 number_with_delimiter(12345678, :delimiter => ".") # => 12.345.678 number_with_delimiter(12345678, :separator => ",") # => 12,345,678 number_with_delimiter(12345678.05, :locale => :fr) # => 12 345 678,05 number_with_delimiter(98765432.98, :delimiter => " ", :separator => ",") # => 98 765 432,98
Formats a number with the specified level of :precision (e.g., 112.32 has a precision of 2 if +:significant+ is false, and 5 if +:significant+ is true). You can customize the format in the options hash.
number_with_precision(111.2345) # => 111.235 number_with_precision(111.2345, :precision => 2) # => 111.23 number_with_precision(13, :precision => 5) # => 13.00000 number_with_precision(389.32314, :precision => 0) # => 389 number_with_precision(111.2345, :significant => true) # => 111 number_with_precision(111.2345, :precision => 1, :significant => true) # => 100 number_with_precision(13, :precision => 5, :significant => true) # => 13.000 number_with_precision(111.234, :locale => :fr) # => 111,234 number_with_precision(13, :precision => 5, :significant => true, strip_insignificant_zeros => true) # => 13 number_with_precision(389.32314, :precision => 4, :significant => true) # => 389.3 number_with_precision(1111.2345, :precision => 2, :separator => ',', :delimiter => '.') # => 1.111,23