1 files changed, 6 insertions, 6 deletions
diff --git a/src/ljstype.js b/src/ljstype.js
index 7de9d9a..6f371bb 100644
--- a/src/ljstype.js
+++ b/src/ljstype.js
@@ -3,27 +3,27 @@
 const assert = require('assert');
 
 const lisdigit = function(c) {
-    return typeof c === 'string' && /^\d$/.test(c.charAt(0));
+    return /^\d$/.test(String.fromCharCode(c));
 };
 
 const lisxdigit = function(c) {
-    return typeof c === 'string' && /^[0-9a-fA-F]$/.test(c.charAt(0));
+    return /^[0-9a-fA-F]$/.test(String.fromCharCode(c));
 };
 
 const lisspace = function(c) {
-    return typeof c === 'string' && /^\s$/.test(c.charAt(0));
+    return /^\s$/.test(String.fromCharCode(c));
 };
 
 const lislalpha = function(c) {
-    return typeof c === 'string' && /^[_a-zA-Z]$/.test(c.charAt(0));
+    return /^[_a-zA-Z]$/.test(String.fromCharCode(c));
 };
 
 const lislalnum = function(c) {
-    return typeof c === 'string' && /^[_a-zA-Z0-9]$/.test(c.charAt(0));
+    return /^[_a-zA-Z0-9]$/.test(String.fromCharCode(c));
 };
 
 module.exports.lisdigit   = lisdigit;
 module.exports.lislalnum  = lislalnum;
 module.exports.lislalpha  = lislalpha;
 module.exports.lisspace   = lisspace;
-module.exports.lisxdigit  = lisxdigit;
-\ No newline at end of file
+module.exports.lisxdigit  = lisxdigit;