I made a Competitive Index System called Chess Competitive Index System (the CCI System). As a creator, I have to update the leaderboard every week by calculating the CCIs from their Chess.com ELO rating, but it is slow. I have to figure (using Excel) for over 50 players in my club. I'm not a programmer, so I don't know how to make a real-time update leaderboard that uses the Chess.com data for members, and I had to disable it (for weeks!). Which site can I use to make that type of leaderboard? If there isn't a site about it, just help me do the code (the main one, is changeable, and has the explanation.)
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I'm finally integrating xstate into my work project because I love it and I'm excited to show off what well-structured states can do for performance and reasoning, but I'm struggling with a bit of modeling. I have a weatherMachine that gets the current temperature based on lat/long and is connected to a map in my app, so when the user moves it, the weather loads. I have that all working beautifully but if the user zooms out too much, I don't want to show weather, as it's not all that useful when you're viewing a large area. My modeling question is whether or not hiding the weather belongs in the weather machine. Part of me thinks it should just get weather when asked to but the point at which I dispatch the event to load weather (onMapRegionChange) is also the place I'd check the zoom level and show/hide the weather. It'd be simplest to add some context to the weather machine for hideWeather but is that "correct?" Any feedback on the approach you all would use would be greatly appreciated.
I am working on my website where I sell concert tickets.
I am working on designing the part of the website where I generate tickets based on seat and rows available.
After some thinking and drawing I have to the conclusion that this design would be best for my problem.
I was wondering is this poor design or are there any improvements that I can make?
Thank you
I wouldn't expect to have a table of unbooked seats. A table of bookings seems more logical. Your concerts table looks questionable if you expect to have a series of dates for the same concert.
Perhaps you should first sketch out the key functions of your site as User Stories or Use Cases and list out the required attributes for each. That could give you a better set of requirements for your database design, e.g. what customer attributes; what about seat attributes such as restricted view, standing places or accessible places for the disabled.
Metaphorically speaking, I'm learning python in a community college for game programming; and our second assignment is to make a text based game. I'm stuck trying to figure out how to get the code to run if the player has something in their inventory, then display these options or print these options if they don't have that certain item in their inventory.
What you describe is what was a very popular type of game a long time ago. The most difficult portion of this type of game is interpreting user input. You can start with a list of possible commands, iterating through each token of the user's input. If I type
look left
the game can begin by calling a method or function which interprets the available visual data. You will want to look into your database implementation for what is left in relation to the current player's position. The game can respond with
You see a wooden box on the floor. It is locked.
You get the idea. As the user, I will probably want to check my inventory for a key. You can implement a subroutine in your parser for searching, categorizing, and using your inventory. The key to writing anything like the described program is spending at least twice as much time testing and debugging the game over how much time you spent coding the first working version. The second key is to make sure you are thinking ahead. Example: "How can I modularize the navigation subroutine so that maps can be modified or expanded easily?"
Comment if you have any questions. Good luck coding!
I wish to create a college project on a simple online multiplayer management game which will involve players setting orders for the day/week and then obtaining profits. Being a relative beginner I am unable to figure out the architecture required for this task.
As far as I am concerned I would be needing the following things:
A text interface to display the status of ongoing events and to set orders in a web browser.
A certain application that would calculate the results every minute and update the database.
A database
Sorry for being so newbish, but any advice or links or books on how to proceed will do.
Please comment if any more information is required.
Any programming language would be fine. Pick a lang / arch you or someone in your group are familiar with. I'm mostly a PHP/ZF, Linux, Postgres guy. So I would...
Write a little ZendFramework app to collect your user's data and save to postgres database. I'd host it on a little Linux server. I like slicehost.com $20/mon, but there are cheaper. Or make friends with someone with a server.
Then for the update of the orders, use a cron job to run every minute. If the update process is complex, use another PHP script, else just straight SQL.
Why do you need to run updates every minute? Are people going to be updating it that often, if they are making orders for a day or week?
I would start with deciding on the equations that will be used in your model.
Then, that will help decide what you need in the database, to give the parameters to the model.
Then, once you have the database, you need to get information from the user, so decide what you need from the user.
For example you should have some random event that will make certain items go up or down in demand, or have resources become more common.
So, you may want to have information in the database that lists what each product is composed of.
If the model will have external information, or, if it is based on what others make, so, for example, last week shoes were not produced, so those that made shoes made a profit. This week everyone is making shoes, so there is too many, so the price went down.
This is why I think starting with your model, and testing your assumptions is the first step.
Any language, system, database will work well, just do what you feel comfy with. When you design the UI, do you want it to look fine on iphones and the Blackberry Razor? Then that will have a big impact on how you design the UI.
I thought I would ask the SO community on helping me with a project that I am currently working on. I need to model the price for a widget in a market situation. The price for the widget should be a result from the current supply and demand. Users will be able to buy and sell the widget at the fixed price. As users buy the widget the demand will go up along with the price. Conversely as users sell the widget the supply will go up and the price will go down. The quantity and current price of the widget will be stored in a database along with the total number of buys and sells for the widget.
Protrade.com has an excellent example of buying and trading widgets (players and teams), I would want to model my system in a similar fashion.
Is there any good programming libraries that will accurately model a market based on supply and demand?
Unfortunately I do not know of any libraries, but perhaps you can tap into Excel's statistics functions.
My opinion follows.
This is why economics is so boring, everything is supply/demand.
Something along the lines of the following should work as a start:
ListPrice = (Cost + Profit) * (demand/supply * economic-factor)
where economic-factor is some determined constant.
If you have some historical data, eg daily supply/demand ratio's you could factor it in, perhaps using some time-based scale.