Problem Looking for tips on how to improve my code and areas that I can better follow Object Orientated principles. […]

# Tag: checksum

## Refactored 2 functions into 1 – Verify UPC/EAN13 barcode

Problem I refactored 2 seperate functions that I found here into a single function: <? function isValidBarcode($barcode) { $barcode = […]

## Calculating Luhn-algorithm checksum digit

Problem Today I decided to learn some basic Haskell, and for starters I made a program for calculating the checksum […]

## Check the validity of a South African ID number using the Luhn Algorithm

Problem import java.math.BigInteger; /** * Created by lungisani on 2017/02/25. */ public class Luhn { public Boolean getIdentitySummation(BigInteger identities){ String […]

## Bash script to perform LUHN check

Problem The following Bash script takes a single parameter (the PAN) and exits with 1 if the PAN does not […]

## Convert ISBN10 to ISBN13

Problem Looking to confirm that I am doing this in the most efficient way. func convrtisbn10(isbn: String) { var checkSum: […]

## Calculating a Luhn Check Digit

Problem I was able to find all kinds of examples that demonstrate how to validate a Luhn Checksum but very […]

## Implementing a 7-3-1 check digit

Problem I need to implement a method that adds a “7-3-1” check digit to my id. The “7-3-1” method works […]

## Implementing a 7-3-1 check digit

Problem I need to implement a method that adds a “7-3-1” check digit to my id. The “7-3-1” method works […]

## Haskell code to verify credit number

Problem I am new to Haskell, and wrote a script to verify credit number. I did some tests, the script […]

- 1
- 2