feat: 🎸 add Either.getOrElse

README.md

@@ -1,4 +1,4 @@
-# MojiScript ![project:experimental](https://img.shields.io/badge/project-experimental-orange.svg) [![build status](https://travis-ci.org/joelnet/MojiScript.svg?branch=master)](https://travis-ci.org/joelnet/MojiScript) [![Coverage Status](https://coveralls.io/repos/github/joelnet/MojiScript/badge.svg?branch=master&v=1)](https://coveralls.io/github/joelnet/MojiScript?branch=master) ![project:experimental](https://img.shields.io/badge/tests-372-green.svg) [![All Contributors](https://img.shields.io/badge/all_contributors-19-orange.svg?style=flat-square)](#contributors)
+# MojiScript ![project:experimental](https://img.shields.io/badge/project-experimental-orange.svg) [![build status](https://travis-ci.org/joelnet/MojiScript.svg?branch=master)](https://travis-ci.org/joelnet/MojiScript) [![Coverage Status](https://coveralls.io/repos/github/joelnet/MojiScript/badge.svg?branch=master&v=1)](https://coveralls.io/github/joelnet/MojiScript?branch=master) ![project:experimental](https://img.shields.io/badge/tests-374-green.svg) [![All Contributors](https://img.shields.io/badge/all_contributors-19-orange.svg?style=flat-square)](#contributors)
 
 ![MojiScript logo](https://raw.githubusercontent.com/joelnet/MojiScript/master/media/MS_logo_64.png)
 

type/Left.js

@@ -43,6 +43,10 @@ function ap() {
   return this
 }
 
+function getOrElse(defaultValue) {
+  return defaultValue
+}
+
 const prototype = {
   '@@type': typeLeft,
   ap,
@@ -51,6 +55,7 @@ const prototype = {
   flatMap,
   leftMap,
   leftFlatMap,
+  getOrElse,
   'fantasy-land/ap': ap,
   'fantasy-land/map': map,
   inspect() {

type/Right.js

@@ -45,6 +45,10 @@ function ap(right) {
   return right.map(this.value)
 }
 
+function getOrElse() {
+  return this.value
+}
+
 const prototype = {
   '@@type': typeRight,
   ap,
@@ -53,6 +57,7 @@ const prototype = {
   flatMap,
   leftMap,
   leftFlatMap,
+  getOrElse,
   'fantasy-land/ap': ap,
   'fantasy-land/map': map,
   inspect() {

type/__tests__/Left.test.js

@@ -98,6 +98,13 @@ describe('type/Left', () => {
     expect(actual).toBe(expected)
   })
 
+  test('getOrElse', () => {
+    expect.assertions(1)
+    const expected = 888
+    const actual = Left(123).getOrElse(expected)
+    expect(actual).toBe(expected)
+  })
+
   test('Left(abc).inspect', () => {
     expect.assertions(1)
     const expected = 'Left ("abc")'

type/__tests__/Right.test.js

@@ -77,6 +77,13 @@ describe('type/Right', () => {
     expect(actual).toBe(expected)
   })
 
+  test('getOrElse', () => {
+    expect.assertions(1)
+    const expected = 888
+    const actual = Right(888).getOrElse(123)
+    expect(actual).toBe(expected)
+  })
+
   test('Right(abc).inspect', () => {
     expect.assertions(1)
     const expected = 'Right ("abc")'