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What is the minimum length of a valid international phone number?

Email address validation using ASP.NET MVC data type attributes

rails 3 validation on uniqueness on multiple attributes

Javascript: how to validate dates in format MM-DD-YYYY?

Checking if form has been submitted - PHP

how do I validate user input as a double in C++?

How to check whether a given string is valid JSON in Java

How do I turn off the mysql password validation?

C# Sanitize File Name

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How can I validate console input as integers?

only allow English characters and numbers for text input

How to inject in @FacesValidator with @EJB, @PersistenceContext, @Inject, @Autowired

Better way to check variable for null or empty string?

Perform client side validation for custom attribute

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Validate uniqueness of multiple columns

ASP.NET MVC Conditional validation

How do you add validation to django rest framework api

A non well formed numeric value encountered