sm | Sparse Matrix - Simple implementation | Machine Learning library

What you're looking to implement is the powerset function shown in the iterools documentation:

In your image tag, you are setting the height and width to 50vh. Viewport units (vh or vw) will cause stuff to overflow out of containers if it sees fit. In your case, everything is working as intended, the image is taking up 50% of the viewport height (637/2 = 319px). It's going to overflow out of the grid container if it needs to in order to meet those dimensions.

You should likely have the image itself have width: 100% height: 100%, or width: 100% height: auto and control the size of the image via the container (like you're already doing).

Hope this helped, let me know if you have questions.

You can name your input-fields as an array like: And get it with var_dump($_POST['col_name']);

In your example you could do like this:

While editing my initial question to add more context as Jay proposed I think it found the issue.

What probably happens? The view where the crash is, contains a table view. Each cell will be configured before being presented. I use a flag which holds the information, if the amount of weight for this cell (it is a strength workout app) has been initially set or is a change. When prepareForReuse is being called, this flag has not been reset. And that now means scrolling through the table view triggers a DB write for each reused cell, that leads to unnecessary writes to the db. Unnecessary, because the exact same number is already saved in the db.

My speculation: Scrolling fast could maybe lead to a race condition (I have read something about that issue with realm) and that maybe causes this weird crash, because there are multiple single writes initiated in a short time.

Solution: I now reset the flag on prepareForReuse to its initial value to prevent this misbehaviour.

The crash only happens when the cell is set up and the described behaviour happens. Therefor I'm quite confident I fixed the issue finally. Let's see. -- I was not able to reproduce the issue, but it also only happens pretty rare.

There are two problems which are causing the counter not to be incremented.

The first is that the CSS:

From your image, it shows that the password (firsttt) is in the database in plaintext. However, when you are querying it, you are using md5 to hash it before you check the database. The MD5 hash of firsttt is 568745cb18115e238907fbf360beb37a and since that doesn't match the field in the database it does not return a result. If you want to see the result return positive, you can remove the md5() function for now just to see it but you should secure the database in some other way.

MD5 alone would not be secure as common passwords are easily detected. The passwords need to be hashed and salted, which makes them more unique and unindentifiable.

For example, php provides a password_hash function that will hash and salt the password: https://www.php.net/manual/en/function.password-hash.php

which you should use when adding a user to the database.

They also provide a password_verify function that will be able to tell you if the submitted password is correct: https://www.php.net/manual/en/function.password-verify.php

Read here for more information: https://www.php.net/manual/en/faq.passwords.php

It's depend upon you and your requirements. You have to maintain the state based in your scenario. All the package you mentioned, used different different approached for state management.

You can try using the backticks/backquotes (``) in place of the apostrophes. So your url will end up as below: