integer.flow

Library provides integer opquae type alias for number and set of functions to work with integer type values with guarantees that any integer returned is not a floating point number, NaN or (-)Infinity.

API

Import

import * as Integer from "integer.flow"

Integer.integer:number

Library exposes integer, a subtype of a number that is guranteed to not be a floating point number, NaN or (-)Infinity.

Integer.parseInteger(string):?integer

Try to turn given string into an intgere, unlike built-in parseInt this function never returns NaN or an Infinity, but rather retuns null (? portion of ?integer). It also unlike built-in parseInt fails (returns null) on strings than aren't numbers like "0what?".

Integer.parseInteger("123") //> 123
Integer.parseInteger("+1234") //> 1234
Integer.parseInteger("-1234") //> -1234
Integer.parseInteger("0x001A") //> 26
Integer.parseInteger("0xBEEF") //> 48879
Integer.parseInteger("3.14") //> null
Integer.parseInteger("3.14") //> null
Integer.parseInteger("+3.14") //> null
Integer.parseInteger("-3.14") //> null
Integer.parseInteger("0") //> 0
Integer.parseInteger(".0") // > null
Integer.parseInteger("NaN") //> null
Integer.parseInteger("-Infinity") //> null
Integer.parseInteger("Infinity") //> null
Integer.parseInteger("0xFF") //> null
Integer.parseInteger("0what?") //> null

Integer.div(integer, integer):integer

Integer division. The remainder is discarded.

Integer.rem(integer, integer):integer

Find the remainder after dividing one number by another.

Integer.rem(11, 4) //> 3
Integer.rem(12, 4) //> 0
Integer.rem(13, 4) //> 1
Integer.rem(-1, 4) //> -1

Integer.mod(integer, integer):integer

Perform modular arithmetic.

Integer.mod(7, 2) //> 1
Integer.mod(-1, 4) //> 3

Integer.round(number):integer

Round a number to the nearest integer.

Integer.floor(number):integer

Floor function, rounding down.

Integer.ceiling(number):integer

Ceiling function, rounding up.

Integer.truncate(number):integer

Truncate a number, rounding towards zero.

Install

npm install integer.flow