Validation is used to check data to make sure it fits whatever required specifications are set for it.

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Mini eCommerce Application and Message/Warning/Error Handling

I decided to build a basic eCommerce application in C++ as a learning experience. In the past, I've gone with a fat controller, skinny model approach, and while it has worked, my results always end up ...
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2answers
54 views

Ruby Mod 11 implementation

I wrote this Ruby Mod 11 (perhaps it's a bit generous to call it that) implementation to validate Brazilian CPF documents, which use a Mod 11 algorithm. CPF format is a 9 digit number followed by two ...
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1answer
28 views

Form data handler class

I've started to write a form data handler class in PHP. Can you please review it and point out any mistakes or logic errors, or perhaps if a method can be written in a better way? ...
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1answer
69 views

Agnostic means of identifying a member

I'm attempting to provide an agnostic means of identifying a member. I need a nickname, a guid, and one of ...
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1answer
70 views

MVC Model validation callback

I have made a simple MVC framework of my own for my personal website to learn a thing or two about how this whole thing even works. I think I've got the idea, but there's one thing I'm not sure about. ...
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3answers
90 views

Reducing boilerplate when validating parameters and using a tuple for the parameter list of a case class

I had designed a simple case class that looks like this: case class StreetSecondary(designator: String, value: Option[String]) I needed to add validation (to ...
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33 views

Refactoring complex phone validations

I have a complex phone validation that does the following: First, check if either a home phone, mobile phone or work phone is provided (there will be 3 text fields in form and at least one type of ...
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1answer
53 views

Redirect browser

I've got a 'menu' within a Master page which include a number of image buttons with click events. Within each click event, I want to redirect the user to a specific page. However, if the user is ...
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2answers
41 views

Pagination filtering

I want to check if there is page variable (in URL) and if it is, if it's correct - it cannot be number 1 because this is default page and it should be valid int ...
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2answers
44 views

Validation using preg_match functions

I need some improvements on my code. I did some validation by preg_match and functions. I need some special characters restrictions every field. ...
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92 views

JavaScript onKeypress validation

This is a function for JavaScript validation: ...
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3answers
688 views

Credit Card Validator Algorithm

I'm writing an algorithm to read from a file a list of numbers, and for each, determine if it is valid. If it is, then display which card type it is. Here is my code so far (using Luhn's algorithm): ...
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4answers
773 views

Determining if all strings are parsable to int

I have to loop through a list of strings and validate that all are parsable to int and not less than 1. Also, if a string is ...
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45 views

Validation on a form in JS

I've got a form that needs validating before the data in the form is added to a service queue: ...
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68 views

Is this a better way to validate a text box for mobile number only?

Is this a better way to validate a text box for mobile number only? Validation: allow only numbers will not allow to paste string including characters allow copy from the box length is set to 10 ...
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254 views

ISBN missing number solver

This is a programming contest question. Question as follows Problem Definition An ISBN (International Standard Book Number) is a ten digit code that uniquely identifies a book. The first 9 ...
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1answer
131 views

Bank account number validation in IBAN format

I wrote a JavaScript function for validation bank account numbers in IBAN format. Please tell me how can I make this better. ...
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2answers
41 views

Simple IPv4 and port validation for chat client

This is part of my chat client's code. It works fine but it looks messy. Any ideas? ...
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1answer
80 views

Bitcoin address validator in C

Here is a Bitcoin address validator I am looking to have reviewed in C. Normally I would have the enum and function prototypes declared in a header file, but I ...
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2answers
198 views

Calculating the checksum digit with the Luhn-algorithm

I'm doing some exercises in Python and this one is about using the Luhn-algorithm to calculate the checksum digit in Swedish personal identification numbers. The description is the same as this ...
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2answers
109 views

Determining if an entity exists in a database via a stored procedure

Here is a short and simple Ajax method that returns "True" or "False" if an entity exists in a database via a stored procedure ...
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97 views

Calculating Luhn-algorithm checksum digit

Today I decided to learn some basic Haskell, and for starters I made a program for calculating the checksum of a Swedish personal identification number. It uses the Luhn-algorithm, aka. ...
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2answers
93 views

Validate multiple regexes without a for loop in JavaScript

For a project, I need to validate a VAT number against the correct algorithm. I found a library for this here (freeware, so I should be able to reuse it) that I'm grateful exists. However, I feel like ...
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3answers
203 views

Refactor a selection validator

I have a data table and have to validate every field in it. I have refactor this code to this below, but the complexity is 15(!!) Should I make something like dictionary with ...
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3answers
141 views

Regex to validate font names

/((([\w -]+)|("[\w -]+"))( *, *)?)+/ http://refiddle.com/18ql I'm trying to use a PHP regex to sanitize a user input for a list of fonts. The above one seems to ...
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2answers
62 views

Generate the Norwegian equivalent to social security numbers - follow-up

First of, here is my previous post. That should explain a fair bit. The reason I'm posting one more time, is I have changed a lot. Using more classes, let them do all the work, and the overall ...
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Pattern tokenization program

I am writing this program to try and get some practice at C++ and correct and proper styling. This code is meant to take user input from a pip and then run it through the program. The user enters a ...
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66 views

Validation/error handling of user input values

This is a tiny learning program that lead to an interesting question: how can I best/most elegantly handle user entered numbers? This method works, fails cleanly, and reads well. It doesn't apply to ...
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1answer
66 views

Validation invoking queries?

I have a question regarding whether it is viable or deemed correct if a validation object invoked a query. Essentially, I have some code that looks like this: ...
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1answer
46 views

Can this date-validation function can be simplified further or is it the correct approach?

I am doing a date validation. I have no. of pages, which have the date field. User can input the date like "220875" or "22AUG75" - I need to test both and check the length as well. ...
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59 views

Multiple drop down validation

I have written some jQuery which validates a group of drop downs. It checks the text value selected in all the drop downs (first three characters), and if there is a duplicate, it warns the user. ...
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Additional model validation

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Validator extended to handle domain objects / entities

I started improving my validator library even more, and I think I'm at the last final element (domain object / entity validations) before I can gladly say that my Validator library is completely done ...
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Regex validation for Email Address

I need to validate whether my regex is correct for below scenario. Suggestion's if the regex is correct: Wiki Link Local_part The local-part of the email address may use any of these ASCII ...
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3answers
503 views

Bank card validation module

I hope that someone could review a module I wrote for bank card validation. I included a class that tests some of the methods, this is purely to show the methods work, rather than unit testing. I ...
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Validating a string under few conditions

Following code validates NIC number of a person (National Identity Card, no like SSN) Requirements are... Length should be 10 digits or characters All should be digits except the last one Last one ...
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1answer
52 views

Using a single validation handler for all controllers in a form

In input validation I'm using this validation method in my all Forms. Here I have a single handler for all TextBoxes in my Form and if I have other controllers like ...
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4answers
207 views

Input validation for text boxes in a Form

In a Win Form I'm doing initial validation in the Form. So before saving data, I want to validate whether all the required fields are filled (Text Boxes) by the user. There are about 18 such Text ...
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1answer
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Can this form validation be simplified made to memory leak free for all browsers?

I am doing a validation and I believe that there are many things that can be reduced or removed. I am still re-working this. But I am looking for some experts to look at my code and offer the very ...
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115 views

Checking if variable is defined before accessing its properties [closed]

I didn't write this but I noticed it in our codebase at work. ...
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1answer
101 views

User name and password validation in a MVP application

In a WinForms application I'm doing the password validation as follows: When the user presses the OK button after entering username and password, an event will be fired and the listener in the ...
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74 views

Validating a model and focus to the element if validation fails

I am using Backbone Marionette - I would like to set the user name and password if that passes the model validation method. I am highly confused with that. Please show me a handy approach or correct ...
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A general purpose GUI data input, with validation, but unclear about best object design

When I'm throwing together prototype code, I don't want to spend extra time setting up parameters, or chasing down problems from entering parameters wrongly. So this is a general purpose, fairly easy ...
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382 views

Allowing users to input a safe subset of HTML

I am currently working on a project that requires users to input text that may or may not be formatted (if it helps, just think of it as a Stack Exchange clone, even though that's not quite accurate). ...
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65 views

Validate fields in Python dictionary using dictionary of lambdas

I would love some feedback on this. I use it to validate web-form objects before persisting them in the dangerously-lazy MongoDb. I have a class and many validators for each of my collections. Is ...
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268 views

Scrubbing user input

I'm taking user input from a file in form (1, 2, 3) to create a color, and I just wanted to know if I was taking most cases into account, and if there is any way I ...
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3answers
2k views

Validate and import data from an Excel file

I have recently designed a module which will do bulk upload for different contents. Basically the user will upload an Excel file, I will have to read and validate headers of excel then each value of ...
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2answers
122 views

Client-side validator for contact information form (name, phone, e-mail)

My recent post had some things to fix. I think this should be well structured and written for you. How does this code look to you? If something needs to be changed please tell me. ...
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2answers
108 views

Possible security issues in email validation

I need feedback on this code regarding security issues. ...
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6answers
2k views

Can people understand my form validation code?

I've just finished creating this form validation but I want to make it public for beginner 'contact us forms'. I was wondering if I can have some peoples' input on if they can understand/read my ...