Fastest way to look up an entity with a set of components?

I’m currently trying to implement an ECS system, but I’ve sort of ran into a problem trying to fetch all of my entities that have a specific set of components. I currently have a Dictionary that maps a component name to a list of Guids (entities), so I have no problem fetching a list of entities if I were to query for just one component. But if I were to query entities for more than one component (e.g. all entities that have Render and Transform component), I run into a problem where it’s no longer a constant time lookup.

I could probably loop through the entities to see if they contain that set of component names (they are stored in a dictionary that maps Guid to a list of strings), but I was thinking that there could be a faster way of doing this?

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Fastest way to select a page from server

In our app the user ask for a domain.com/uniqueID. Then, based on the unique ID we decide what html page we show him, by asking the server with this unique ID.

I am now thinking about 2 approaches, since I am new to this :

  1. User ask for domain.com/ID , he get a redirect page where we send server the ID, then we know the right new url, and ask this url from server again. (2 server access, 1 db access)

  2. User ask for domain.com/ID, he get a page with all html(+their css/js), we ask the server about the ID, and load right on the client side the right html that we already have. (1 server access(larger file file), 1 db ).

  3. preload html on server side which I DONT LIKE.

How is this usually done ? (we use Firebase)

How the fastest Spanish keyboard users type accent marks and Spanish-specific characters

Wondering what a proficient, super skilled Spanish text/copy editor individual does to type accents like á and tilde’s like ñ. Wondering if they, on a Mac, would use the popup that appears if you hold a character (which seems slow for a fast typer). Or if they use the built-in keyboard shortcuts for Mac or Windows (like alt+e for ´ on Mac). Or if they use vim or some other specialized text editor. Or perhaps a custom virtual keyboard overlay, which just maps the keys to something specifically useful to Spanish. Or maybe it’s completely different from these options. Basically am interested to know how one does it in a way that isn’t annoying like it is on the standard Mac keyboard, either with the popup or the alt codes.

Fastest way to transfer user profile data, installed applications etc [on hold]

I currently work for a MSP that has contacts for thousands of PCs.

Some of them require a standard image that can be imaged and deployed with minimal hands on interaction.

Many others require specialized software individual to the user, multiple profiles to be transferred, network printers to be installed, some are going from Windows 7 to 10, and future state there will always be a refresh cycle where upgrading will be done between Windows versions.

Currently we image based on the type of worker and location individually on a build shelf with multiple PCS hooked up to a KVM. The requirements for the build will have been previously obtained by an on site technician that physically logs into the machine and documents installed applications and printers.

We then drop it off to our field technician who drives to the location, performs a Windows Easy Transfer (can take up to 3 hours) of all profile data to the new PC, and has the user test that all is well.

I feel a lack of efficiency in the build, deploy, and possibly the requirements gathering. If it were possible, I’d like to connect both machines to the network, and perform a copy of all installed apps, profile data, network printers etc, with minimal downtime for the user, which could be utilized for deployments with dissimilar Windows versions. I’m just unsure of what solutions exist.

Fastest path on a snakes and ladders board

I am not looking for a detailed review of this code as I am aware it is very inefficient. The main reason for posting this is to see if there is a better way to achieve my goal (I am certain there must be)

I have created code to find the fewest number of dice rolls that would permit someone to move from the first to last square on a snakes and ladders board. The player wins if they land on or go beyond the final square on the board. They start off the board at position -1.

My approach uses recursion so is OK for small boards. The moment the board reaches a size of 30+ it takes far too long to generate the solution.

Is there a better way to solve this problem

"""Module works out fastest way to traverse a snakes and ladders board""" def roll_dice(position, roll_number, number_squares, snakes, ladders, list_moves=[]):     """Roll the dice and then work out if the player can climb a ladder / has won"""     if position in ladders:         position = ladders[position]     if position >= number_squares -1:         list_moves.append(roll_number)         return     for i in range(1, 7): #For each position roll the dice 6 times         if position + i in snakes:             continue  # Forbid a dice-roll that lands on a snake         roll_dice(position + i, roll_number + 1, number_squares, snakes, ladders)     return list_moves  def minimum_moves(number_squares, snakes={}, ladders={}):     """Returns the minimum number of moves starting from position 0 for a board of size n     snakes and ladders are both dictionaries containing the starting point as the key     and end point as the value"""     # Initialise board     # The player starts off the board at position -1     list_moves = roll_dice(-1, 0, number_squares, snakes, ladders)      print(f"Board is traversable in {min(list_moves)} moves")   if __name__ == "__main__":     NUMBER_SQUARES = 25     SNAKES = {21:0, 19:9, 14: 2, 18:5}     LADDERS = {2: 21, 4:9, 10:20, 17:23}     minimum_moves(NUMBER_SQUARES, SNAKES, LADDERS)