Provides methods for converting a numbers into formatted strings. Methods are provided for phone numbers, currency, percentage, precision, positional notation, and file size.
- human_size
- number_to_currency
- number_to_human_size
- number_to_percentage
- number_to_phone
- number_with_delimiter
- number_with_precision
Alias for number_to_human_size
Formats a number into a currency string. You can customize the format in the options hash.
- :precision - Sets the level of precision, defaults to 2
- :unit - Sets the denomination of the currency, defaults to "$"
- :separator - Sets the separator between the units, defaults to "."
- :delimiter - Sets the thousands delimiter, defaults to ","
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) => $1,234,567,890.506 number_to_currency(1234567890.50, :unit => "£", :separator => ",", :delimiter => "") => £1234567890,50
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# File vendor/rails/actionpack/lib/action_view/helpers/number_helper.rb, line 55 55: def number_to_currency(number, options = {}) 56: options = options.stringify_keys 57: precision = options["precision"] || 2 58: unit = options["unit"] || "$" 59: separator = precision > 0 ? options["separator"] || "." : "" 60: delimiter = options["delimiter"] || "," 61: 62: begin 63: parts = number_with_precision(number, precision).split('.') 64: unit + number_with_delimiter(parts[0], delimiter) + separator + parts[1].to_s 65: rescue 66: number 67: end 68: end
Formats the bytes in size into a more understandable representation. Useful for reporting file sizes to users. This method returns nil if size cannot be converted into a number. You can change the default precision of 1 in precision.
number_to_human_size(123) => 123 Bytes number_to_human_size(1234) => 1.2 KB number_to_human_size(12345) => 12.1 KB number_to_human_size(1234567) => 1.2 MB number_to_human_size(1234567890) => 1.1 GB number_to_human_size(1234567890123) => 1.1 TB number_to_human_size(1234567, 2) => 1.18 MB
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# File vendor/rails/actionpack/lib/action_view/helpers/number_helper.rb, line 137 137: def number_to_human_size(size, precision=1) 138: size = Kernel.Float(size) 139: case 140: when size == 1 : "1 Byte" 141: when size < 1.kilobyte: "%d Bytes" % size 142: when size < 1.megabyte: "%.#{precision}f KB" % (size / 1.0.kilobyte) 143: when size < 1.gigabyte: "%.#{precision}f MB" % (size / 1.0.megabyte) 144: when size < 1.terabyte: "%.#{precision}f GB" % (size / 1.0.gigabyte) 145: else "%.#{precision}f TB" % (size / 1.0.terabyte) 146: end.sub('.0', '') 147: rescue 148: nil 149: end
Formats a number as a percentage string. You can customize the format in the options hash.
- :precision - Sets the level of precision, defaults to 3
- :separator - Sets the separator between the units, defaults to "."
number_to_percentage(100) => 100.000% number_to_percentage(100, {:precision => 0}) => 100% number_to_percentage(302.0574, {:precision => 2}) => 302.06%
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# File vendor/rails/actionpack/lib/action_view/helpers/number_helper.rb, line 78 78: def number_to_percentage(number, options = {}) 79: options = options.stringify_keys 80: precision = options["precision"] || 3 81: separator = options["separator"] || "." 82: 83: begin 84: number = number_with_precision(number, precision) 85: parts = number.split('.') 86: if parts.at(1).nil? 87: parts[0] + "%" 88: else 89: parts[0] + separator + parts[1].to_s + "%" 90: end 91: rescue 92: number 93: end 94: end
Formats a number into a US phone number. You can customize the format in the options hash.
- :area_code - Adds parentheses around the area code.
- :delimiter - Specifies the delimiter to use, defaults to "-".
- :extension - Specifies an extension to add to the end of the generated number
- :country_code - Sets the country code for the phone number.
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)
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# File vendor/rails/actionpack/lib/action_view/helpers/number_helper.rb, line 20 20: def number_to_phone(number, options = {}) 21: number = number.to_s.strip unless number.nil? 22: options = options.stringify_keys 23: area_code = options["area_code"] || nil 24: delimiter = options["delimiter"] || "-" 25: extension = options["extension"].to_s.strip || nil 26: country_code = options["country_code"] || nil 27: 28: begin 29: str = "" 30: str << "+#{country_code}#{delimiter}" unless country_code.blank? 31: str << if area_code 32: number.gsub!(/([0-9]{1,3})([0-9]{3})([0-9]{4}$)/,"(\\1) \\2#{delimiter}\\3") 33: else 34: number.gsub!(/([0-9]{1,3})([0-9]{3})([0-9]{4})$/,"\\1#{delimiter}\\2#{delimiter}\\3") 35: end 36: str << " x #{extension}" unless extension.blank? 37: str 38: rescue 39: number 40: end 41: end
Formats a number with grouped thousands using delimiter. You can customize the format in the options hash.
- :delimiter - Sets the thousands delimiter, defaults to ","
- :separator - Sets the separator between the units, defaults to "."
number_with_delimiter(12345678) => 12,345,678 number_with_delimiter(12345678.05) => 12,345,678.05 number_with_delimiter(12345678, :delimiter => ".") => 12.345.678
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# File vendor/rails/actionpack/lib/action_view/helpers/number_helper.rb, line 104 104: def number_with_delimiter(number, delimiter=",", separator=".") 105: begin 106: parts = number.to_s.split(separator) 107: parts[0].gsub!(/(\d)(?=(\d\d\d)+(?!\d))/, "\\1#{delimiter}") 108: parts.join separator 109: rescue 110: number 111: end 112: end
Formats a number with the specified level of precision. The default level of precision is 3.
number_with_precision(111.2345) => 111.235 number_with_precision(111.2345, 2) => 111.24
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# File vendor/rails/actionpack/lib/action_view/helpers/number_helper.rb, line 119 119: def number_with_precision(number, precision=3) 120: "%01.#{precision}f" % number 121: rescue 122: number 123: end