added the posibility to recognize floats

README.md

@@ -38,6 +38,8 @@ r(1,2).plus(r(1,3)).minus(r(1,4)).times(r(1,5)).per(r(1,6)) === r(49,70); // tru
 // my personal favorite aproximation of Pi, from ancient china
 r(355,113).val(); // 3.1415929203539825
 
+// you can give floats and they will be converted into rationals
+rats(0.4,0.1) == rats(4);
 
 ```
 
@@ -89,7 +91,7 @@ r(355,113).val(); // 3.1415929203539825
     `r(355,113).val(); //3.1415929203539825`
 
 # Good to know
-If you provide anything else as the numerator, than a whole number in base 10 an exception will be thrown.
+If you provide anything else as the numerator, than an integer, float or a numerica string an exception will be thrown.
 On the other hand, if you do the same with the denominator, it will be cast to 1. This is because
 I am lazy, and I do not want to handle wrong values and undefined values differently throwing for the former
 and casting to 1 for the latter.

index.js

@@ -67,20 +67,42 @@ void function(root){
 
     })
 
+
     function rat(numerator, denominator){
 
-        var index, divisor;
+        var index, divisor, dendecimals = 0, numdecimals = 0
 
-        if ( ! u.isInt(numerator) ) {
+        if ( typeof numerator != 'number' && typeof numerator != 'string'
+                && (! u.isInt(numerator)) ) {
             throw new Error('invalid argument '+numerator+' ('+(typeof numerator)+')')
-        } else {
-            numerator = big(numerator)
         }
+        if ( typeof denominator != 'number' && typeof denominator != 'string'
+                && (! u.isInt(denominator)) ) {
+            denominator = 1
+        }
+        debugger;
+        numerator = numerator+''
+        denominator = denominator+''
 
-        if ( ! u.isInt(denominator) ) {
-            denominator = big.ONE
-        } else {
-            denominator = big(denominator)
+        if ( numerator.indexOf('.') > -1 ) {
+            numdecimals = Math.pow(10, numerator.length - numerator.indexOf('.') - 1)
+            numerator = numerator.split('.').join('')
+        }
+
+        if ( denominator.indexOf('.') > -1 ) {
+            dendecimals = Math.pow(10, denominator.length - denominator.indexOf('.') - 1)
+            denominator = denominator.split('.').join('')
+        }
+
+        denominator = big.parse(denominator)
+        numerator = big.parse(numerator)
+
+        if ( dendecimals > 0 ) {
+            numerator = numerator.multiply(dendecimals)
+        }
+
+        if ( numdecimals > 0 ) {
+            denominator = denominator.multiply(numdecimals)
         }
 
         if ( denominator.isZero() ) {

package.json

@@ -1,7 +1,7 @@
 {
   "name": "rationals",
   "description": "rational numbers with operations",
-  "version": "0.1.6",
+  "version": "0.1.7",
   "main": "index.js",
   "scripts": {
     "test": "mocha",

test/test.js

@@ -28,6 +28,13 @@ y = rats(3, 14)
 third = rats(1, 3)
 
 
+describe('common usage', function(){
+    it('recognizes decimal numbers, converts them into fractions', function(){
+        expect(rats(0.5)).to.be(rats(1,2))
+        expect(rats(0.33)).to.be(rats(33,100))
+        expect(rats(0.4,0.1)).to.be(rats(4))
+    })
+})
 describe('elementary arithmetic', function() {
     it('addition', function() {
         expect(one.plus(two)).to.be(three)
@@ -110,4 +117,5 @@ describe('operations with infinity and the origo → ', function() {
         expect(origo.div(x)).to.be(origo)
     })
 
+
 })