Top "Alphanumeric" questions

Alphanumeric refers to strings containing a combination of letters and digits.

How to generate a random alpha-numeric string

I've been looking for a simple Java algorithm to generate a pseudo-random alpha-numeric string. In my situation it would be …

java string random alphanumeric
Regular expression to allow spaces between words

I want a regular expression that prevents symbols and only allows letters and numbers. The regex below works great, but …

regex space alphanumeric
How to strip all non-alphabetic characters from string in SQL Server?

How could you remove all characters that are not alphabetic from a string? What about non-alphanumeric? Does this have to …

sql-server parsing user-defined-functions alphanumeric alphabetic
how do i block or restrict special characters from input fields with jquery?

How do I block special characters from being typed into an input field with jquery?

jquery special-characters alphanumeric
How to remove leading zeros from alphanumeric text?

I've seen questions on how to prefix zeros here in SO. But not the other way! Can you guys suggest …

java string alphanumeric
Determine if char is a num or letter

How do I determine if a char in C such as a or 9 is a number or a letter? Is …

c char alphanumeric
HTML5 form validation pattern alphanumeric with spaces?

I have the following input tag in my html5 form: <p> <label>Company Name*</label&…

regex html validation forms alphanumeric
How to determine if a String has non-alphanumeric characters?

I need a method that can tell me if a String has non alphanumeric characters. For example if the String …

java string character alphanumeric
Regex for checking if a string is strictly alphanumeric

How can I check if a string contains only numbers and alphabets ie. is alphanumeric?

java regex alphanumeric
Replace all non Alpha Numeric characters, New Lines, and multiple White Space with one Space

I'm looking for a neat RegEx solution to replace All non Alpha-Numeric Characters All NewLines All multiple instances of white …

javascript regex replace alphanumeric