Need regex for specific requirement

Question

Hello I need regex for following requirement . 1. Need regex for decimal number in which i can dynamicaly change its scale. like 12 123.2 132.22 23.2222 2. Need regex for Url which can have http or https or not have this. but url must www.abc.com. it can be http://www.abc.com https://www.abc.com.au or www.abc.com Thanks in advance.

Vulpes · Answer

So by 'scale' you mean the maximum number of digits that can appear after any decimal point? To create a dynamic regular expression you'll need to use the RegExp object rather than a regular expression literal. Something like this: function isScaledNumber(var text var scale) { var pattern = ^\d+(\.\d{1 + scale + })?$; var regExp = new RegExp(pattern); return regExp.test(text); }

Ajay Patel · Answer

Hello Thanks for reply. I have tried with regex of decimal digits it is working fine for static regex. but when I change regex dynamically it is not working. like I pass 2 scale then regex must validate following number : 12.23 12.2 12 if 3 scale then it should validate 12 23.1 23.12 24.123 In short I need to make regex dynamically for decimal digits

Vulpes · Answer

For the first one try: ^\d+(\.\d+)?$ and for the second one: ^(https?://)?www(\.\w+){23}$