checkdigit | Helper classes to calculate and validate ckecksums | Validation library

by byrokrat PHP Version: Current License: Unlicense

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | checkdigit Summary

checkdigit is a PHP library typically used in Utilities, Validation applications. checkdigit has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Helper classes to calculate and validate ckecksums.

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Security

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Support

checkdigit has a low active ecosystem.

It has 9 star(s) with 3 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

checkdigit has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of checkdigit is current.

Quality

checkdigit has no bugs reported.

Security

checkdigit has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

checkdigit is licensed under the Unlicense License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

checkdigit releases are not available. You will need to build from source code and install.

Installation instructions, examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed checkdigit and discovered the below as its top functions. This is intended to give you an instant insight into checkdigit implemented functionality, and help decide if they suit your requirements.

Calculates the sum of the number .
Get pos weight .
Assert that number is numeric
Validate a number .
Calculates check digit .

Get all kandi verified functions for this library.

checkdigit Key Features

No Key Features are available at this moment for checkdigit.

checkdigit Examples and Code Snippets

No Code Snippets are available at this moment for checkdigit.

Community Discussions

Trending Discussions on checkdigit

Luhn Algorithm Logic

I'm having trouble understanding the "element" parameter in Array.prototype.filter()

for loop help and storing expression results

Python String Manipulation - Split, Slice, Convert from HEX to DEC

ConvertAvroToJSON Apache Nifi with data type preserve

How to check the strength of a password in C++ using bool functions

Karate api test is converting @ to %40 while making a post call

Firebase query equalTo() or startAt().endAt() stop working

How can I pass std::cin as an argument for a function?

Displaying generated PNG in PHP?

QUESTION

Luhn Algorithm Logic

Asked 2021-Feb-12 at 16:04

I am currently going through Codecademy's Full Stack Engineer course, up until now I have been perfectly fine with it, discovering new things, working out problems on my own, but this is a serious roadblock in my progression as I just can't seem to identify the problem with this logic. I don't mean to question Luhn's algorithm but seriously I need some clarification on this...

So my problem is, that the algorithm is returning all my arrays as valid, my code is below (arrays provided by codecademy):

...

ANSWER

Answered 2021-Feb-12 at 14:27

Your algorithm is unnecessarily complicated. Wikipedia describes it succinctly, just implement the 3 steps

From the rightmost digit (excluding the check digit) and moving left, double the value of every second digit. The check digit is neither doubled nor included in this calculation; the first digit doubled is the digit located immediately left of the check digit. If the result of this doubling operation is greater than 9 (e.g., 8 × 2 = 16), then add the digits of the result (e.g., 16: 1 + 6 = 7, 18: 1 + 8 = 9) or, equivalently, subtract 9 from the result (e.g., 16: 16 − 9 = 7, 18: 18 − 9 = 9).

Take the sum of all the digits (including the check digit).

If the total modulo 10 is equal to 0 (if the total ends in zero) then the number is valid according to the Luhn formula; otherwise it is not valid.

I also think you misunderstood what the check digit is. You appeared to be appending it to the array as 0, and trying to calculate it at the end. It's already there in the number - it's the final digit.

Source https://stackoverflow.com/questions/66173063

QUESTION

I'm having trouble understanding the "element" parameter in Array.prototype.filter()

Asked 2021-Jan-20 at 16:43

I've been learning JavaScript through Codecademy for the past few months and right now I'm working on a credit card validator exercise.

My goal in this step is to iterate every other element in an array, and I've used the following code to do so, which works perfectly (provided by dannymac in another post):

...

ANSWER

Answered 2021-Jan-20 at 16:40

You are not using element in your case... The filter you have implemented will select even elements regarding their position in the array.

Here is an example where you use element:

Source https://stackoverflow.com/questions/65813652

QUESTION

for loop help and storing expression results

Asked 2020-Dec-12 at 00:27

completely new to java and struggling with my assignments, I don't just want to ask for answers but the tutors are not even giving me the methods to use to write my code so I am struggling.

the advice given to me is to tidy up the formatting of the code so all the lines are either at the same level or cascade in one direction. needless to say this did no help.

I feel I am close, but might benefit from a push in the right direction.

the question is: In this part you will write a public method calculateCheckNumber() to find S and then use the expression given in part (d) to find C. The method should first create a string omitting the last digit of the longNumber and then find S by iterating through this string. (You may choose to do a separate iteration for the odd and even indexes, or you could do both in a single loop.) Finally, your method should calculate and return the value of C using the expression given in (d). Choose meaningful identifiers for your variables.

Expression: Check that the long number has exactly 16 digits. If not, the long number is not valid.

If the long number has 16 digits, drop the last digit from the long number, as this is the "check digit" that we want to check against.

Multiply by 2 the value of each digit starting from index 0 and then at each even index. In each case, if the resulting value is greater than 9, subtract 9 from it. Leave the values of the digits at the odd indexes unchanged.

Add all the new values derived from the even indexes to the values at the odd indexes and call this S.

Find the number that you would have to add to S to round it up to the next highest multiple of 10. Call this C. If C equals the check digit, then the long number could be valid.

...

ANSWER

Answered 2020-Dec-12 at 00:27

package com.kickstart;

public class CreditCardChecker {
    /**
     * Variables
     */
    public String longNumber;
    public int checkDigit;
    public int checkSum;
    public int evenNumber;

    /**
     * Constructor for initializing objects of class CreditCardChecker
     */
    public CreditCardChecker(String longNumber, int checkDigit, int checkSum, int evenNumber) {
        this.longNumber = longNumber;
        this.checkDigit = checkDigit;
        this.checkSum = checkSum;
        this.evenNumber = evenNumber;
    }

    /**
     * Getters
     */
    public int getCheckDigit() {
        return checkDigit;
    }

    public int getCheckSum() {
        return checkSum;
    }

    public int getEvenNumber() {
        return evenNumber;
    }
    
    public String getLongNumber() {
        return longNumber;
    }

    /**
     * Setters
     */
    public void setEvenNumber(int evenNumber) {
        this.evenNumber = evenNumber;
    }

    public void setCheckSum(int checkSum) {
        this.checkSum = checkSum;
    }

    public void setCheckDigit(int checkDigit) {
        this.checkDigit = checkDigit;
    }

    public void setLongNumber(String longNumber) {
        this.longNumber = longNumber;
    }

    /**
     * Method to check that long number has exactly 16 digits and if character are only digits.
     * @return true if lenght of string is 16 and contains only digits, false otherwise
     */
    public boolean isCorrectLength() {
        return getLongNumber().length() == 16 && getLongNumber().matches("[0-9]+");
    }

    /**
     * Method multiplies every even number by two and checks if $result is more than 10, if true $result - 9
     * otherwise just append number to StringBuilder
     * @return String of length 16
     */
    public String everyEvenNumberIsMultipliedBy2(){
        // You can use any variable here you want to append results {String, Integer, etc.}
        StringBuilder result = new StringBuilder();
        // Method described on line n. 56
        if(isCorrectLength()){
            // For loop through String "longNumber"
            for(int i = 0; i < getLongNumber().length(); i++){
                // When character on index of "i" from for loop is an Odd number
                if(Character.getNumericValue(getLongNumber().charAt(i)) % 2 == 0){
                    // We multiplicity number by two and check if number is more than 10
                    if((Character.getNumericValue(getLongNumber().charAt(i)) * 2) > 10)
                        // If so we do on number minus nine and write it to our "result" variable
                        result.append(Character.getNumericValue(getLongNumber().charAt(i)) * 2 - 9);
                    else
                        // Otherwise we just append it to result without modifying
                        result.append(getLongNumber().charAt(i));
                } else
                    // So we do here. I could write this better (we do repetition on this line and line n. 85), but I wanted you to understand what is happening here
                    result.append(getLongNumber().charAt(i));

            }
        }
        // We return "result" which is of type StringBuilder so we parse it to String
        return result.toString();
    }
}

Source https://stackoverflow.com/questions/65257182

QUESTION

Python String Manipulation - Split, Slice, Convert from HEX to DEC

Asked 2020-Jul-21 at 11:02

I have the following string:

...

ANSWER

Answered 2020-Jul-21 at 11:02

Here is a very compact solution:

Source https://stackoverflow.com/questions/63012969

QUESTION

ConvertAvroToJSON Apache Nifi with data type preserve

Asked 2020-Jun-23 at 13:04

Below is the flow that I've created to fetch data from DB and invoke a web service.

QueryDatabaseTableRecord --> SplitAvro --> ConvertAvroToJson --> EvaluateJsonPath --> ReplaceText --> InvokeHTTP

While converting AvroToJson, the date column is being interpreted as an integer value.

Date format from DB within avor object

Date format has converted to integer after converting Avro to Json.

Is there any way of preserving the data type while converting Avro to Json?

Avro schema that I've tried:

...

ANSWER

Answered 2020-Jun-23 at 13:04

@Ramu Convert the field as a string, not a timestamp as a date is not a timestamp.

If you need to work on that value to get a real timestamp from the date you will want to use the string, and then use expression languages for timestamps. You would do this in updateAttribute on attributes you have extracted via EvaluateJson.

An example to a full timestamp is:

Source https://stackoverflow.com/questions/62529588

QUESTION

How to check the strength of a password in C++ using bool functions

Asked 2020-May-01 at 20:26

Working on an exercise for my class. My teacher wants us to work with C-string, not the string class. We must use bool functions and C-string commands to determine if a password is strong enough. I think I'm close to being done but I must have some error somewhere? Here's what I've got:

...

ANSWER

Answered 2020-May-01 at 20:26

All your loops are wrong, you're confusing the index of the character you are testing, with the count of the number of characters that have passed the test, you need separate variables for this. Plus you have an out by error on the length of the length of the string, you had len - 1 instead of len. So this

Source https://stackoverflow.com/questions/61549956

QUESTION

Karate api test is converting @ to %40 while making a post call

Asked 2020-Apr-07 at 13:24

I have written an api test using karate framework. While doing a post call it's converting the value of email field from TEST@ABC.COM to TEST%40ABC.COM.

Here are few lines from log

...

ANSWER

Answered 2020-Apr-07 at 13:24

This is correct as per the HTTP spec: https://stackoverflow.com/a/53638335/143475

You can see for yourself, try this:

Source https://stackoverflow.com/questions/61080664

QUESTION

Firebase query equalTo() or startAt().endAt() stop working

Asked 2019-Dec-17 at 01:12

I already tried suggestions from other posts but no success. I just run into an issue,I got the following code which displays data from Firebase database when user clicks on a specific date.If I comment out (startAt(),endAt()), the recycler gets populated with all data, when I add equalTo() or startAt().endAt()) recycler does not get populated. The code before was working normally, just recently stopped working and I have no clue why. The code looks like this: Bellow is the adapter:

...

ANSWER

Answered 2019-Dec-17 at 01:12

I fix-it,It was the query, was missing "orderBychild()" field, most probable I mistakenly deleted otherwise cannot explain-it :))

Source https://stackoverflow.com/questions/59365128

QUESTION

How can I pass std::cin as an argument for a function?

Asked 2019-Nov-14 at 06:04

I've searched for answers on stackoverflow and am simply not getting it. A well-explained answer would be amazing.

Here's my incomplete code for a password validator. I ask for user input and then run it through a series of boolean functions to decide whether it meets the strong password criteria.

If you find any other errors(which I'm sure there is), please let me know. Thanks!

...

ANSWER

Answered 2019-Nov-14 at 06:03

How can I pass std::cin as an argument for a function?

std::cin is an std::istream. Thus, the way to pass it to a function is like this:

Source https://stackoverflow.com/questions/58849995

QUESTION

Displaying generated PNG in PHP?

Asked 2019-Oct-31 at 10:28

So I'm trying to get a generated UPC bar code to display on an index page. but all it does is output the PNG contents instead of displaying the PNG itself. I'm not quite sure why its doing this. I'm guessing its some silly little thing i need to add but I have no clue what it would be. So any help would be appreciated.

INDEX CODE

...

ANSWER

Answered 2018-Jul-06 at 20:42

To display an image in an HTML page, you need to use an tag. To display image contents in an tag, you need to use a Data URI Scheme.

You'll end up with something like this:

Source https://stackoverflow.com/questions/51217310

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Vulnerabilities

No vulnerabilities reported

Install checkdigit

Checkdigit requires the bcmath php extension.

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