Module

Data.Number.Format

A module for formatting numbers as strings.

Usage:

> let x = 1234.56789

> toStringWith (precision 6) x
"1234.57"

> toStringWith (fixed 3) x
"1234.568"

> toStringWith (exponential 2) x
"1.23e+3"

The main method of this module is the toStringWith function that accepts a Format argument which can be constructed through one of the smart constructors precision, fixed and exponential. Internally, the number will be formatted with JavaScripts toPrecision, toFixed or toExponential.

#Format 

data Format

The Format data type specifies how a number will be formatted.

#precision 

precision :: Int -> Format

Create a toPrecision-based format from an integer. Values smaller than 1 and larger than 21 will be clamped.

#fixed 

fixed :: Int -> Format

Create a toFixed-based format from an integer. Values smaller than 0 and larger than 20 will be clamped.

#exponential 

exponential :: Int -> Format

Create a toExponential-based format from an integer. Values smaller than 0 and larger than 20 will be clamped.

#toStringWith 

toStringWith :: Format -> Number -> String

Convert a number to a string with a given format.

#toString 

toString :: Number -> String

Convert a number to a string via JavaScript's toString method.

> toString 12.34
"12.34"

> toString 1234.0
"1234"

> toString 1.2e-10
"1.2e-10"

Modules