strcode | Structure your code

I'm trying to update my database where in the Book copies will be updated to 5 depending on the Book code.

The Book copies I initialize in the database was 10. For now, I have a fixed value of 5 to change it. My plan is to decrement the copies by 1 if users borrowed it. But for now, I'm trying to learn how to update the book first if it will work.

Here's my code where the Book copies in my database still hasn't updated to 5.

I have the following loop for getting Woocommerce coupons on a page within the my account section of a customers dashboard.

Currently we have 10k+ coupons and just by performing this loop, it's a huge drain on resources and not very efficient causing time outs. Are there any obvious ways in which I can improve the efficiency of it?

Is there a way I can limit the loop to the only search for emails in the "Allowed emails" field (as each coupon is tied to an email address)?

I'm programmatically applying a coupon to a subscription via a custom dashboard form so the user doesn't go through the standard cart to apply it. All it's doing is taking the code they've entered into an input then applying it to the sub.

Is there a way to validate the coupon against the user in the same way the cart performs a tonne of validation (like if the coupon has been used, can be a recurring coupon etc etc).

Is there a way to hook into that validation rather than me manually writing out all the different checks? It feels wrong doing it this way and likely that things will slip through the net.

I've got some basic checks in there like if the coupon exists, then the usage limit check.

I have come up with the following function which works as it should:

The text field should display in the list as a new item when the buttons are clicked When I click the button the data of text are should be added in the list as a new line. How to link a button to this function?

I am using the following function to make an XHR request and execute javascript from the response if possible:

I'm using MPLabX IDE 5.4 with XC8 compiler (a C/MPASM hybrid compiler that has a driver named pic-as v.2.2 as its assembler) to compile/assemble a simple piece of assembly code and to output a listing file.

My entire assembly code:

I'm attempting to get a json file from a website into UITableview with Objective C. As I'm not an advanced coder please excuse my crude coding tecniques. I have a .json file uploaded to my webspace. The File is formatted as so:

I am reading through an rcv file and if I find the substring 602 in the line that starts with T then gather the data starting at an always defined starting point and going 27 more characters. I want to read in any decimal value up to 10 points after just because.

When I go to pull the value and print 17.000 works, 17.030 works, 17.003 returns an empty string so the insert into SQL fails. Why does the 3rd thing fail? Is there something with .00X where X equals some single digit, not 0, or is there something else?

I have tried String.Format, pulling in as a decimal and converting, and just pulling in as a string and using that.