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-rw-r--r--src/ljstype.js10
1 files changed, 5 insertions, 5 deletions
diff --git a/src/ljstype.js b/src/ljstype.js
index ef4be1d..7de9d9a 100644
--- a/src/ljstype.js
+++ b/src/ljstype.js
@@ -3,23 +3,23 @@
const assert = require('assert');
const lisdigit = function(c) {
- return /^\d$/.test(c.charAt(0));
+ return typeof c === 'string' && /^\d$/.test(c.charAt(0));
};
const lisxdigit = function(c) {
- return /^[0-9a-fA-F]$/.test(c.charAt(0));
+ return typeof c === 'string' && /^[0-9a-fA-F]$/.test(c.charAt(0));
};
const lisspace = function(c) {
- return /^\s$/.test(c.charAt(0));
+ return typeof c === 'string' && /^\s$/.test(c.charAt(0));
};
const lislalpha = function(c) {
- return /^[_a-zA-Z]$/.test(c.charAt(0));
+ return typeof c === 'string' && /^[_a-zA-Z]$/.test(c.charAt(0));
};
const lislalnum = function(c) {
- return /^[_a-zA-Z0-9]$/.test(c.charAt(0));
+ return typeof c === 'string' && /^[_a-zA-Z0-9]$/.test(c.charAt(0));
};
module.exports.lisdigit = lisdigit;