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-rw-r--r--src/core.js7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/core.js b/src/core.js
index cc921385d..3389e83f7 100644
--- a/src/core.js
+++ b/src/core.js
@@ -33,6 +33,9 @@ var jQuery = function( selector, context ) {
// Check for non-word characters
rnonword = /\W/,
+ // Check for digits
+ rdigit = /\d/,
+
// Match a standalone tag
rsingleTag = /^<(\w+)\s*\/?>(?:<\/\1>)?$/,
@@ -488,6 +491,10 @@ jQuery.extend({
return obj && typeof obj === "object" && "setInterval" in obj;
},
+ isNaN: function( obj ) {
+ return obj == null || !rdigit.test( obj ) || isNaN( obj );
+ },
+
type: function( obj ) {
return obj == null ?
String( obj ) :