Package Exports

@qvvg/mario

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@qvvg/mario) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

MARIO

Because pipes...

Install

npm install --save @qvvg/mario

use pipe as composition

import {pipe} from "@qvvg/mario"

const double = x => x * 2
const result = await pipe(4, [double, double, double, double])

assert(result.value, 64)

use pipe as validation

import {pipe, Ok, Nope, isOk, isNope} from "@qvvg/mario"

const isString = value => {
  return typeof value === "string"
    ? Ok(value)
    : Nope(value, "Needs to be a string!")
}

const hasAt = value => {
  return /@/.test(value) ? Ok(value) : Nope(value, "Must have an @...")
}

const validateEmail = email => pipe(email, [isString, hasAt])

const v1 = await validateEmail("bob@bob.bob")
assert(v1.value, "bob@bob.bob")
assert(isOk(v1), true)
assert(isNope(v1), false)

const v2 = await validateEmail(1234)
assert(v2.value, 1234)
assert(isOk(v2), false)
assert(isNope(v2), true)
assert(v2.reason, "Needs to be a string!")

const v3 = await validateEmail("bobbob.bob")
assert(v3.value, "bobbob.bob")
assert(isOk(v3), false)
assert(isNope(v3), true)
assert(v3.reason, "Must have an @...")

pipes can be async

import {pipe, Ok, Nope, log} from "@qvvg/mario"

await pipe(null, [
  _ => fetch(url),
  r => (r.ok ? Ok(r.json()) : Nope(r.json(), r.statusText)),
  log("DATA"),
])

pipes can handle errors

import {pipe, log} from "@qvvg/mario"

const double = x => x * 2
const bang = x => {
  throw new Error("EXPLOSION!!!")
}

const result = await pipe(4, [
  double,
  double,
  bang,
  log("I will never happen because bang"),
  double,
])

assert(result.value, 16)
assert(isOk(result), false)
assert(isNope(result), true)
assert(result.reason, "pipe::throw")
assert(result.error.message, "EXPLOSION!!!")