Ext isNumber

Some of the testings with Ext.isNumber are as follows..


Ext.isNumber(null)) false
Ext.isNumber(undefined) false
Ext.isNumber('') false
Ext.isNumber('1') false
(Ext.isNumber(1)) true
Ext.isNumber('1.234')false
(Ext.isNumber(1.234))true
(Ext.isNumber('1AS')false
(Ext.isNumber('AS1')false
Ext.isNumber('.1132')false
(Ext.isNumber(.132))true
Ext.isNumber('asdf')false
asdf is not defined [Break on this error] console.log("(Ext.isNumber(adsf))"+Ext.isNumber(asdf));