My Numbers

Parse and stringify numbers using the format that you want.

Install

$ npm --save install my-numbers

or you can use externally

<script src="dist/my-numbers.js">

Usage

import MyNumbers from 'MyNumbers'

// use the 1.1,00 format
const mnumbers = MyNumbers('1.1,00')

mnumbers.parse('1.323,32') // 1323.32
mnumbers.stringify(1323.32) // '1.323,32'

Formats

Complete format:

#+?1,1.0000?#

• # It Indicate if the numbers can have prefixes. See prefixes and suffixes section for more info.
• +? It Indicate if the numbers can have + or - symbols. The character ? indicate if that symbols are optionals in the stringify function.
• 1,1 integer part. the character , is the thousands separator. you can use any character here. Also you can use only the character 1 If you don't want thousands separator.
• .0000? Decimal part. The character . is the decimal separator, and the number of zeros is the number of decimals will have the decimal part. The character ? indicate that the decimal numbers will optional in the stringify function.
• # Indicate if the number can have suffixes. See prefixes and suffixes section for more info.

Format examples

1

Only integer numbers

parse	stringify
'33' => 33	123 => '123'
'33.32' => false	123.3 => false

1,0

Parse decimals, using the , as decimal character, and one round in one decimal.

parse	stringify
'33' => 33	123 => '123,0'
'33,39' => 33.4	123.38 => '123,4'
'33.39' => false ( the decimal characters isn't , )	0.73 => '0,7'

1_000

Now the decimal characters is _ and the number of decimal is 3.

parse	stringify
'33' => 33	123 => '123_000'
'33_32' => 33.32	123.3 => '123_300'
'33_3248' => 33.325	8.34328 => '8_343'

1,000?

Decimal character is ,. 3 decimals, and the character ? indicate the 3 decimals are optionals in the stringify function.

parse	stringify
'33' => 33	123 => '123'
'33,32' => 33.32	123.3 => '123,3'
'33,3248' => 33.325	8.34328 => '8,343'

1.1,00

The integer part has as thousands separator the character . . And the decimal separator is ,.

parse	stringify
'88' => 88	328 => '328,3'
'1.732,23' => 1732.23	10839 => '10.839,00'
'33.324.883,23' => 33324883.23	834328.323 => '834.328,32'
'333.32,33' => false (incorrect format number)

+1_1'00

Now you can add the + and the - sign in the numbers, and the numbers string always have that symbols. The thousands separator is _ and the decimal separator is '

parse	stringify
'88' => 88	328 => '+328,3'
"-1_732'23" => -1732.23	-10839 => "-10_839'00"
"33_324_883'23" => 33324883.23	834328.323 => "+834_328'32"
"333_32'33" => false (incorrect format number)

+?1 00

Parse numbers with sign and the + and - symbols are optional in the stringify function. And the decimal separator is <space>

parse	stringify
'99 32' => 99.32	132.489 => '132 49'
'-99 32' => -99.32	-132.489 => '-132 49'

,000

Only decimals. The decimal separator is ,

parse	stringify
',323' => 0.323	0.442 => ',442'
'3,323' => false (number has integer part)	0.8 => ',800'

This only are some examples of formats. You can combine the before formats for makes others.

MyNumber Object

MyNumbers(string|array format[, object prefixes[, object suffixes ] ])

• See the formats section for more info about format parameter.
• See the prefixes and suffixes section for more info about prefixes and suffixes parameters

Parse function

MyNumbers(...).parse(float|int number)

This function transform a string number in a number depending of the format. If the string number no match with the format then return false.

// example
const mn = MyNumbers('1.1,000')

mn.parse('3.323') // 3233
mn.parse('4.323.323,1') // 4323323.1
mn.parse('4_323_323,1') // false
mn.parse('4.33,1') // false

Multiparse

You can add two or more format. Parse returns an object with the formats and his results.

// example
const mn = MyNumbers(['1.1,000', '1,1.000'])

mn.parse('3.323') // { '1.1,000': 3323, '1,1.000': 3.323}
mn.parse('3.32') // { '1.1,000': false, '1,1.000': 3.320}

Stringify function

Transform a number in a string number depending of the format. If the number isn't compatible with the format the return false.

MyNumbers(...).stringify(float|int number[, string prefix[, string suffix]])

• See the prefixes and suffixes section for more info about prefix and suffix parameters.

// example
const mn = MyNumbers('1_1 000')

mn.s(3323) // '3_233 000'
mn.parse(888323.3) // '888_323 300'
mn.parse(-1) // false. The format not admit negative number.

MultiStringify

You can add two or more format. Stringify function returns an object with the formats and his results.

// example
const mn = MyNumbers(['1_1 000', '+?1,000?'])

mn.s(3323) // {'1_1 000': '3_323 000' '+?1,000?': '3323'}
mn.parse(432.3) // {'1_1 000': '432 300', '+?1,000?': '432,3'} 
mn.parse(-1) // {'1_1 000': false, '+?1,000?': '-1'}

Prefixes and suffixes

You can use prefixes and suffixes in the numbers. Firstly you must specify the prefixes and the suffixes in the number format.

const format = '#1.1,00#' // The characters # indicate you can use prefix and suffix in the numbers.

// More format examples 
'#1.00' // number with prefix.
'1.1,000#' // number with suffix
'#1.0#' // number with prefix and suffix

// you make the prefixes and the suffixes that you want
const pr = {'a': 20, 'b': 30 }
const su = {'dm': 10, 'hm': 100, 'km': 1000}
// the key is the prefix/suffix and the value is the multiplier. the number will multiply with this value when parse and divide when stringify

const mn = MyNumbers(format, pr, su)
mn.parse('3dm') // 30
mn.parse('3,3244hm') // 332.44 
mn.parse('1.100km') // 1100000
mn.parse('a32') // 640
// can use prefix and suffix
mn.parse('a32dm') // 6400

Customize the prefixes and suffixes.

You can use functions for make suffixes and prefixes

/*
  @param {int} num the number
  @param {boolean} False in the parse function, True in stringify function
  @return {int} Number modified.
*/
const kelvin = (num, inv) => !inv num + 273.15 : num - 273.15
const su = { K: kelvin }
const mn = MyNumbers('+1,00#', null, su)

mn.parse('100K') // 373.15
mn.stringify(10, null, 'K') // '-263,15K'

LICENSE

The license is MIT. See LICENSE file to more info.