From 5c6f3e64a637abbc7b52ceaad931e7e827f4dc1e Mon Sep 17 00:00:00 2001
From: Daniel Sastre <dani.sastre@gmail.com>
Date: Mon, 8 May 2017 17:14:39 +0200
Subject: [PATCH] Fix isInteger(null) === true

Polyfill from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger.
---
 util.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/util.js b/util.js
index 8a05b06..d65b5a0 100644
--- a/util.js
+++ b/util.js
@@ -3,7 +3,7 @@
 var t = require('tcomb');
 
 function isInteger(n) {
-  return n % 1 === 0;
+  return typeof n === 'number' && isFinite(n) && Math.floor(n) === n;
 }
 
 var Null = t.irreducible('Null', function (x) { return x === null; });
@@ -13,4 +13,4 @@ module.exports = {
   isInteger: isInteger,
   Null: Null,
   Int: Int
-};
\ No newline at end of file
+};