stevenson | Static sites with dynamic Ruby icing

It doesn't work like that, when you extends from base.html, you only have to override the blocks, it should be something like:

base.html

I have found that you certainly have to follow Doug's advice and try to return null, this is one of the reasons why event-driven functions fail to complete

When functions written in Node.js return a rejected promise or pass a non-null value to a callback.

the function stops executing by default and the event is discarded.

You also need to terminate your background functions and return a null value or use another promise method.

If a function creates background tasks (such as threads, futures, Node.js Promise objects, callbacks, or system processes), you must terminate or otherwise resolve these tasks before returning from your function. Any tasks that are not terminated prior to returning from a particular execution may not be completed, and may also cause undefined behavior.

First of all, storing ["a", "ap", "app", "appl", "apple"] into an array and performing an whereArrayContains() query, doesn't sound like a feasible idea. Why? Imagine you have a really big online shop with 100k products, in which 5k start with "a". Are you willing to pay 5k reads every time a user types "a"? That's a very costly feature.

Most likely you should return the corresponding documents when the user types, for example, two, or even three characters. You'll reduce costs enormously. Or you might take into consideration using the solution I have explained in the following article:

• How to filter Firestore data cheaper?

Let's go forward.

For example, in every case, the documents that would be returned on each successive call where an additional letter was typed would be a subset of what was returned in the previous call, it would just be a smaller list of documents.

Yes, that's correct.

My question is since the documents retrieved on a successive query are a subset of those retrieved in a prior query, would I be charged reads based on how many documents each successive query returns?

Yes. You'll always be charged with a number of reads that is equal to the number of documents that are returned by your query. It doesn't matter if a query was previously performed, or not. Every time you perform a new query, you'll be charged with a number of reads that is equal to the number of documents you get.

For example, let's assume you perform this query:

You can do it with the $event parameter. Make sure to compare your values safely.

If your value is not in the right type or has spaces or unwanted chars, this c.state == val might not work.

You can use the trim function to compare your value safely: c.state.trim() == val.trim()

HTML

Check with np.select:

You are trying to insert more than 1 rows, so instead of cursor.execute() use cursor.executemany():

You may try using re.findall with the pattern (?:(?<=\n)|(?<=^))\|\s*\|\s*(\S+)(?:\n|$), which will find only single word names:

event.pos() contains the position of your cursor in your QMainWindow coordinate system. The method itemAt expects a position in the coordinate system of your table viewport.

You have to map the position in your event to the right coordinate system with something like that:

That is all about how std::vector works.

Whenever it runs out of memory, upon the next std::vector::push_back it simply allocates a new chunk, copies (or moves, if possible) all the data and then deletes the old one. Since it can't really know how much space do you need, automatic reallocations rely on some strategy, the most common of which is to allocate N * 2 where N is the current capacity. Now let's look at what's going on in main.

std::vector accounts; - this creates an empty vector (no allocations).

account one {"Jonathon Stevenson"}; - this creates an object of your class by invoking your, let's call it string-constructor, that's where you get the very first output into console.

accounts.push_back(account(one)); - this one is responsible for the next three messages (account(one) creates a temporary using copy-constructor, which works by invoking string-constructor; after that said temporary gets moved into the vector). Here the capacity of accounts is 1;

The next "iteration" of creation and pushing works the same way, except you get an additional move: that's vector moving data to a new location. Here the capacity of accounts is 2;

Same goes for the next one. Here the capacity of accounts is 4;

Then, at accounts.push_back(four); - you do not longer create an excessive temporary, and thus don't see move-constructor working. Here the capacity of accounts is 4;

At the next push_back another reallocation happens, and you can see vector moving all the contents (4 elements) to a new location.

At last, when you try to accounts.push_back( account("Tom Sullivanson") ); your capacity is 8 and the number of elements inside accounts is also 8, so you can see vector yet again moving its contents to a new location - exactly 8 times. Now capacity is 16 and no reallocations will occur in this program anymore.