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I have two classes, App and qrCode. The qrCode class returns a image of the qrcode based on the address provided in that classes state. The app class displays the qrcode component. In the method getSessionID, the app makes a request to the server, then should call updateQrCode to update the qrcode that is being shown.

How can I call the method updateQrCode from App.js? I can't instantiate a new QrCode, because that is not the instance that is being displayed.

App.js:

I'm using javascript (React, but I don't think this is specific to React) to handle a form submit. None of my elements are controlled, and I'd like to keep it that way. I may not know beforehand exactly what the form elements are, how many there are, etc. I just want to grab whatever is in the form and send it wherever it needs to go.

I'm doing some logging in the event handler so I can inspect event.target.elements and it's a bit confusing. It seems to look like both an indexed array and an object at the same time, with each form element getting a numeric entry and a named entry. It has a length property equal to the length of the number of numeric entries (ignoring the named entries), but if I try to use a .forEach directly on it, I get the error event.target.elements.forEach is not a function. If I use Object.entries to loop over it, both the numeric and the named entries are logged. But if I use lodash to loop over it, I just get the numeric entries.

I'd just like to know what exactly is going on. If event.target.elements is not an array, why does it have a length property? If it is an array, why can't I use a regular forEach directly on it?

My form submit event handler looks something like this, for testing/learning purposes:

I copied the navigation bar from one Youtube video. I wanted to try Bootstrap and when I added it to my project, the text changed the font and the links went up in the bar. So how do I make the text look the same as it did before Bootstrap?

Before Bootstrap:

After Bootstrap:

etusivu.html:

I have these classes:

I am pretty sure this SQL requires using GROUP BY and HAVING, but not sure how to write it.

I have a table similar to this:

In this table Rows 1 & 2 are effectively duplicates, as are rows 3 & 4. This is determined by the ItemCode having the value of 'I' or 'Insert' in rows 1 & 2. And 'D' or 'Delete' in rows 3 & 4.

How could I write a SQL select statement to return rows 2 and 4, as I am interested in pulling out the duplicated rows with the higher ID value.

Thanks for any help.

Goal:
Get the second data by pressing the button and the list should display in the html page. It should replace the old data with a new data.

Problem:
I cannot make the button to be working in order to display the result on the webpage. Show new data and replace the old data.

What part am I missing?

Info:
*I'm newbie in Reactjs

Stackblitz:
https://stackblitz.com/edit/react-fetch-data-from-api-f632fh?

Thank you!

Is there a way to uniquely identify a transaction from a QFX file (downloaded from a bank) and the list of transactions fetched from plaid?

There is FITID in the QFX file and transaction_id in plaid transaction list. But is there any common unique identifier for both QFX file and Plaid transaction?

QFX file:

Yes, there are already similar issues on SO on that scanf() does not wait for the user's input before "interpreting" an enter keypress, but my problem is that this problem only occurs when the scan -- which is %ld (with a space in front) -- reads a string instead of another long number. Details are below if this summary seems convoluted.

I have the following program in C:

I am looking for regex (preferably in R) which can replace specific character say ; with say ;; but only when not present inside parenthesis () inside the text string. Example

• text;othertext to be replaced with text;;othertext
• but text;other(texttt;some;someother);more to be replaced with text;;other(texttt;some;someother);;more. (i.e. ; only outside () to be replaced with replacement text)

Still if some clarification is needed I will try to explain