/\A[^@\s]+@([^@\s]+\.)+[^@\s]+\z/ Meaning??

Can somebody please explain the meaning of validates_format_of: :email, with: /\A[^@\s]+@([^@\s]+\.)+[^@\s]+\z/ ...

What does [CFWS] and [FWS] mean in this ABNF??

The RFC 2282 for emails have the below ABNF for quoted-string. quoted-string = [CFWS] ...

C Program - Validate numbers read from a text file?

I am reading 15 numbers from a text file, with each number in a new line: 1 2 3 4 5 10 12 13 14 15 21 22 23 24 26 ...

Numeric input validation in C?

I am doing a lab for an intro programming class I have to make sure that an integer is entered. I thought this wou...

g-recaptcha-response with AJAX?

I've got a contact-form which sends it's information with an ajax-request to an php-script. Now I like to implement ...

How does Page.IsValid work??

I have following code with a RequiredFieldValidator. The EnableClientScript property is set as "false" in the valida...

Remove values from select list based on condition?

I have the following in the page <select name="val" size="1" > <option value="A">Apple</option> &...

Numerical values associated with Drop Down options?

So I am creating an app to work out a value based on a series of variables (see full code in this gist). The variabl...

“Stray start tag footer” in html validator??

I cannot work out why I am getting this error: Stray start tag footer. This is the code (I took the content out...

The for attribute of the label element must refer to a non-hidden form control?

I have some errors in my code Here is my error: The for attribute of the label element must refer to a non-hidde...

Always get “Network connection was lost”as a validation issue?

I am trying up upload my first app to the store. I had a real issue (wrong syntax on version string) first time so ...

Best way to check if a Data Table has a null value in it?

what is the best way to check if a Data Table has a null value in it ? Most of the time in our scenario, one column...

WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for jquery?

In my web application I get the following error: WebForms UnobtrusiveValidationMode requires a ScriptResourceMap...

An invalid form control with name='' is not focusable?

I have an acute problem on my website. In Google Chrome some customers are not able to proceed to my payment page. W...