Fix isInteger(null) === true

Polyfill from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger.
gcanti · May 8, 2017 · 5c6f3e6 · 5c6f3e6
1 parent 8565ed0
commit 5c6f3e6
Showing 1 changed file with 2 additions and 2 deletions.
diff --git 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
-};
+};