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comma-number
Advanced tools
$ npm install --save comma-number
const commaNumber = require('comma-number')
commaNumber(1000) // "1,000"
commaNumber(-1000) // "-1,000"
commaNumber(-1000, '.') // "-1.000"
commaNumber(1000.12) // "1,000.12"
commaNumber(-1000.12) // "-1,000.12"
commaNumber('-1000,12', '.', ',') // "-1.000,12"
// make a new function using custom separator and decimal char:
const format = commaNumber.bindWith('_', '!')
// use it as you would commaNumber().
format(1000) // "1_000"
format(-1000) // "-1_000"
format(1000.12) // "1_000!12"
format(-1000.12) // "-1_000!12"
Revised implementation changes the API a bit:
string
and number
is returned as is, not as '0'
.bindWith
function to use a currying style to bind options for a reusable format function.Other changes:
Parameters:
Returns:
The commaNumber
function accepts these same parameters as the second and third params. This prevents using currying to bind them and reuse that bound function.
The bindWith
function accepts the options and returns a function bound with them.
// the default commaNumber uses a comma separator and period for decimal char.
var commaNumber = require('comma-number')
// can build a custom version using bindWith.
, format = commaNumber.bindWith('_', '!')
, result1 = commaNumber(1234567.89)
, result2 = format('1234567.89')
console.log(result1) // outputs: 1,234,567.89
console.log(result2) // outputs: 1_234_567!89
# run tests via tap
$ npm test
# benchmark current implementation versus previous
npm run benchmark
# get coverage info by default with testing:
npm test
The rewrite has a considerable performance increase from the previous version.
I converted the benchmark output from my machine into a table.
It compares the performance of version 1.1.0 with 2.0.0. The inputs with decimals can only be processed by the new version so those show as "invalid" for the previous version.
FAQs
Format a number with commas or custom character
The npm package comma-number receives a total of 65,128 weekly downloads. As such, comma-number popularity was classified as popular.
We found that comma-number demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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