IRCRA

WARNING

Some grade types do not match 1:1 with other grade types during conversion. Currently the first found match is returned.

Supported Grade Systems

Gender, Vermin, Font, IRCRA, YDS, French/Sport, British, Tech, Ewbank, BRZ, UIAA, Metric UIAA, Watts

Grade System Types

name	type
male (level)	number
female (level)	number
vermin	string
font	string
ircra	number
yds	string
sport	string
british	string
tech	string
ewbank	number
brz	string
uiaa	string
uiaa_metric	number
watts	number

Description

Tiny Library for converting values between different climbing route grade systems.

Installation

npm install ircra

Usage

Example

import IRCRA from 'ircra'

const ircra = new IRCRA()
const test = ircra.convert('yds', '5.3').to('vermin')

console.log(test) // {vermin:null}

Methods

get

console.log(
    new IRCRA().get('yds')
) // [...]

The get method generates an index for the chosen grade system, and returns a new object for that type. It takes an optional parameter of gradeSystem. If no argument is provided, all grades in all grade systems are returned.

console.log(
    new IRCRA().get()
) // [{...}]

convert

console.log(
    new IRCRA().convert('yds', '5.1').to('vermin')
) // {...}

The convert method takes two parameters. The gradeSystem and gradeValue. It returns an object with a to method that takes one parameter, the target gradeSystem.

It will then return an object with the new gradeSystem value.

scale

console.log(
    new IRCRA().scale()
) // [{...}, {...}...]

The scale method returns a list of possible scale values with human-readable values associated with their respective internal ids.

Efficiency

Since this package loads the climbing grade version directly at runtime, attempts are made to make the queries / conversions more efficient.

When you call .get with a type. An index (Map) is generated in memory, and used for the conversions to other types.

The first .get call is benchmarked at around .2ms, but subsequent get/convert calls come in at around 0.002ms.