money-math - npm Package Compare versions

Comparing version 1.0.0 to 1.1.0

money.js

@@ -71,2 +71,5 @@ (function (exports) {
     exports.centsToAmount = function (cents) {
+        var sign,
+            abs;
+
         if (!isString(cents)) {
@@ -76,7 +79,10 @@ return;
 
-        while (cents.length < 3) {
-            cents = ["0", cents].join("");
+        sign = (cents[0] === "-" ? "-" : "");
+        abs = (sign === "-" ? cents.substr(1) : cents)
+
+        while (abs.length < 3) {
+            abs = ["0", abs].join("");
         }
 
-        return cents.substr(0, cents.length - 2) + "." + cents.substr(-2);
+        return sign + abs.substr(0, abs.length - 2) + "." + abs.substr(-2);
     };
@@ -116,2 +122,16 @@
 
+    exports.div = function (a, b) {
+        var hundredthsOfCents = bignum(
+                exports.amountToCents(a)
+            ).mul("10000").div(
+                exports.amountToCents(b)
+            ),
+
+            remainder = parseInt(hundredthsOfCents.toString().substr(-2), 10);
+
+        return exports.centsToAmount(
+            hundredthsOfCents.div("100").add(remainder > 50 ? 1 : 0).toString()
+        );
+    };
+
     exports.percent = function (value, percent) {
@@ -118,0 +138,0 @@ var p = bignum(exports.amountToCents(value)).mul(exports.amountToCents(percent)),

package.json

 {
   "name": "money-math",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "bignum-based arbitrary precision operations on currency amounts \"XXX.YY\"; because floats are BAD for representing money",
@@ -5,0 +5,0 @@ "main": "money.js",

README.md

@@ -42,2 +42,3 @@ [![Build Status](https://secure.travis-ci.org/ikr/money-math.png)](http://travis-ci.org/ikr/money-math)
     money.mul("24.00", "0.25");         // "6.00"
+    money.div("64.00", "2.00");         // "32.00"
     money.percent("200.00", "3.25");    // "6.50"
@@ -44,0 +45,0 @@

spec/money.spec.js

@@ -25,2 +25,10 @@ (function () {
 
+        it("works on a negative fraction", function () {
+            expect(money.centsToAmount("-32")).toBe("-0.32");
+        });
+
+        it("works on a tiny negative fraction", function () {
+            expect(money.centsToAmount("-1")).toBe("-0.01");
+        });
+
         it("works for zero", function () {
@@ -156,2 +164,20 @@ expect(money.centsToAmount("0")).toBe("0.00");
 
+    describe("money.div()", function () {
+        it("basically works", function () {
+            expect(money.div("64.00", "2.00")).toBe("32.00");
+        });
+
+        it("rounds stuff up 1", function () {
+            expect(money.div("1.00", "3.00")).toBe("0.33");
+        });
+
+        it("rounds stuff up 2", function () {
+            expect(money.div("0.50", "3.00")).toBe("0.17");
+        });
+
+        it("works for negative dividend, with rounding up", function () {
+            expect(money.div("-1.00", "3.00")).toBe("-0.33");
+        });
+    });
+
     describe("money.percent()", function () {
@@ -158,0 +184,0 @@ it("calcualtes the [2nd argument] percent of the [1st argument] 1", function () {

No alert changes

Improved metrics

Total package byte prevSize

16430

increased by9.59%

Lines of code

316

increased by12.46%

Number of lines in readme file

63

increased by1.61%

No dependency changes