Minor refactoring and adding of unit cm

README.md

@@ -23,10 +23,12 @@ distFrom(chicago).to(ny).in('mi');
 
 
 #### Supported units
-* km or kilometers
-* m or meters
-* mi or miles
-* ft or feet
+* km || kilometer || kilometers
+* m || meter || meters
+* cm || centimeter || centimeters
+* mi || mile || miles
+* ft || feet
+* yd || yard || yards
 
 ### License
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

__tests__/distance.spec.js

@@ -49,26 +49,37 @@ describe('distFrom().from().to().in()', () => {
     ).toBe(5570);
   });
 
-  test('gets distance from ny to london in miles', () => {
+  test('gets distance from ny to london in meters', () => {
     expect(
       parseInt(
         distFrom(ny)
           .to(london)
-          .in('miles'),
+          .in('m'),
         10
       )
-    ).toBe(3461);
+    ).toBe(5570315);
   });
 
-  test('gets distance from ny to london in meters', () => {
+  test('gets distance from ny to london in centimeters', () => {
     expect(
       parseInt(
         distFrom(ny)
           .to(london)
-          .in('m'),
+          .in('cm'),
         10
       )
-    ).toBe(5570315);
+    ).toBe(557031545);
+  });
+
+  test('gets distance from ny to london in miles', () => {
+    expect(
+      parseInt(
+        distFrom(ny)
+          .to(london)
+          .in('miles'),
+        10
+      )
+    ).toBe(3461);
   });
 
   test('gets distance from ny to london in yards', () => {
@@ -82,6 +93,17 @@ describe('distFrom().from().to().in()', () => {
     ).toBe(6091752);
   });
 
+  test('gets distance from ny to london in kilometers', () => {
+    expect(
+      parseInt(
+        distFrom(ny)
+          .to(london)
+          .in('inches'),
+        10
+      )
+    ).toBe(219303876);
+  });
+
   test('gets distance from ny to london in feet', () => {
     expect(
       parseInt(

lib/index.ts

@@ -1,11 +1,9 @@
 import { Result, Failure, Success} from "amonad"
 
 type Position = [number, number]
-type Units = 'km' | 'kilometers' | 'm' | 'meters' | 'meter' | 'metre' | 'mi' | 'mile' | 'miles' | 'feet' | 'ft' | 'yd' | 'yard' | 'yards'
+type Units = 'km' | 'kilometer' | 'kilometers' | 'm' | 'meters' | 'meter' | 'metre' | 'cm' | 'centimeter' | 'centimeters' | 'mi' | 'mile' | 'miles' | 'feet' | 'ft' | 'in' | 'inch' | 'inches' | 'yd' | 'yard' | 'yards'
 
-const multiply = (multiplier1: number) => (multiplier2: number) => multiplier1 * multiplier2
-
-const unitList: Units[] = ['km', 'kilometers', 'm', 'meters', 'meter', 'metre', 'mi', 'mile', 'miles', 'feet', 'ft', 'yd', 'yard', 'yards']
+const unitList: Units[] = ['km', 'kilometers', 'kilometers', 'm', 'meters', 'meter', 'metre', 'cm', 'centimeter', 'centimeters', 'mi', 'mile', 'miles', 'feet', 'ft', 'in', 'inch', 'inches', 'yd', 'yard', 'yards']
 
 class DistanceFrom {
   private distance: Result<number, Error> = Failure(new Error("Destination is not configured, run distFrom.to()."))
@@ -89,6 +87,10 @@ class DistanceFrom {
           return distance * 0.6213712
         else if (units === 'm' || units === 'meter' || units === 'meters' || units === 'metre')
           return distance * 1000
+        else if (units === 'cm' || units === 'centimeter' || units === 'centimeters')
+          return distance * 100000
+        else if (units === 'in' || units === 'inch' || units === 'inches')
+          return distance * 39370.1
         else if (units === 'ft' || units === 'feet')
           return distance * 3280.84
         else if (units === 'yd' || units === 'yard' || units === 'yards')
@@ -104,6 +106,6 @@ class DistanceFrom {
   }
 }
 
-module.exports = function (val) {
+module.exports = function (val: Position) {
   return new DistanceFrom(val)
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "distance-from",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "description": "Calculate distance between two coordinates",
   "main": "dist/index.js",
   "scripts": {