lila | lichess.org | Game Engine library
kandi X-RAY | lila Summary
kandi X-RAY | lila Summary
lila (li[chess in sca]la) is a free online chess game server focused on realtime gameplay and ease of use. it features a search engine, computer analysis distributed with fishnet, tournaments, simuls, forums, teams, tactic trainer, a mobile app, and a shared analysis board. the ui is available in more than 130 languages thanks to the community. lichess is written in scala 2.13, and relies on the play 2.8 framework. scalatags is used for templating. pure chess logic is contained in the scalachess submodule. the server is fully asynchronous, making heavy use of scala futures and akka streams. websocket connections are handled by a separate server that communicates using redis. lichess talks
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QUESTION
I am trying to find the preceding row to a specific occurrence in a database, or rather some data from it.
In this example I would like to find the movement_method of the preceding row (sorted by timestamp) before a user visited the pub. So in tom's example I would like to know that tom went home by car before visiting the pub. (it doesn't matter how he traveled to the pub but rather the used method before going to the pub)
I have an example database with: user, location, movement_method, timestamp:
user location movement_method timestamp tom work car 2022-03-02 14:30 tom home car 2022-03-02 20:30 tom pub bus 2022-03-02 22:30 tom home foot 2022-03-03 02:30 jane school bus 2022-03-02 08:30 jane home bus 2022-03-02 14:30 jane pub foot 2022-03-02 21:30 jane home bus 2022-03-02 23:30 lila work bus 2022-03-02 08:30 lila home bus 2022-03-02 16:30 jake friend car 2022-03-02 15:30 jake home bus 2022-03-02 20:30 jake pub car 2022-03-02 20:30 jake home car 2022-03-03 02:30For this database the result I would want would be: | user | preceding_movement_method | | ---- | ------- | | tom | car | | jane | bus | | jake | bus |
- lila is not being reported because she never visited the pub
- I only need to know the preceding movement_method before visiting the pub (sorted by time)
- the movement_method which was used to go to the pub is not relevant
My current approach is to have a partition or window function for "preceding_movement_method" but I'm stuck finding the "preceding" entry before the one which fits the where statement.
So I'm looking for something like this pseudocode:
...ANSWER
Answered 2022-Apr-01 at 09:31Well, I'm not sure if it's a typo but the user jake has an IDENTICAL timestamp at home as at pub's which is an unlikely event. The code may seem a bit complicated, but it does take the problem into consideration.
QUESTION
Create a program, palindrome.py, that has a function that takes in one string argument and prints a sentence indicating if the text is a palindrome. The function should consider only the alphanumeric characters in the string, and not depend on capitalization, punctuation, or whitespace. If the string is a palindrome, it should print: It's a palindrome! However, if the string is not a palindrome, it should print: It's not a palindrome!
The Problem
My code is not printing whether it is a palindrome when there are spaces inside the string, but does print that it is not a palindrome despite having spaces. I included replace(), zip(), and reversed() in my code to account for the spaces and the reversed words, but it is not printing the desired result.
What am I missing or doing wrong in my code?
...ANSWER
Answered 2022-Mar-18 at 08:47Your whole code is indented in the first if
condition, which means it would work only if your entry string has a space in it.
On top of that, do you use quotes or double quotes when you add your argument ? Because using sys.argv[1]
takes the 1st argument.
QUESTION
Consider the following SQL run on SQL Server. The only difference between these two blocks is that one has the Default Namespace Set. Why does the one with the default namespace fail to parse?
I realize there are other ways to parse xml within sql server. I am just trying to understand the oddity in these two examples explicitly. Any help is appreciated.
...ANSWER
Answered 2022-Feb-17 at 19:25The first doc has a default namespace so the names, so ROOT and Customers are in the namespace "Test", and the XPath expression "/ROOT/Customers" doesn't match them. You need to introduce a namespace alias for "Test" to use in your XPath expression.
You do this by providing a dummy XML doc with the alaised namespace declarations as the third argument to sp_xml_preparedocument, like this:
QUESTION
I have a long list, and I want to add the first letter into another cell with psql command.
A header Another header John J Lila L Dwane D Zaba Z Kiol K Longi L Uthe U Hell HLike this.
...ANSWER
Answered 2022-Feb-07 at 10:57You can use the left()
postgres function to extract the first charater from a string, see the manual. Try something like this :
QUESTION
Selenium Python get_attribute("src") returns None, eventhough there is a "src" attribute
Code Trials:
...ANSWER
Answered 2022-Feb-01 at 15:25To print the value of the src attribute you need to induce WebDriverWait for the visibility_of_element_located() and you can use either of the following Locator Strategies:
Using CSS_SELECTOR:
QUESTION
Welcome,
for a long time I'm struggling with the problem of redirecting the url to a separate url in case the a special baerer token is given, I don't want to change any parameter just make a match and send this match to another url.
My setup is apache 2.4.41
typical request from postman:
https://xxxdddyyy.dqco1.firma-online.com/rest/auto-com/complete_addr?in_country=FR&in_line=73 avenue des lilas&access_token=988738467
the redirection should be like this:
http://tomcat-local:10022/rest/auto-com/complete_addr?in_country=FR&in_line=73 avenue des lilas&access_token=988738467
What I've tried so far in apache2.conf
...ANSWER
Answered 2022-Jan-27 at 10:28Finally this issue was solved by adding RewriteOptions InheritDown
before the rewrite rules, and adding RewriteEngine On
to all the virtualhosts.
Try:
QUESTION
I'm stuck on how to calculate the total amount and total price of my cart in this project. The task is to create a simple (beginners) e-commerce website where a customer should be able to click on a product and add it to their cart (with the name, amount and price displayed of the product, the amount and price should update correctly according to how many times a customer clicks on the button attached to the product).
And I can only use javascript (or html if necessary).
I have the website mostly working. Everything can be added to the cart and the cart keeps track of the amount and price for each product.
But I can't figure out how to make it so when I press the buy button, below the cart, the total amount and total price of all the products added to the cart is displayed in a string beneath the cart.
I've tried searching online for answers but I can't seem to figure it out.
Please help! :)
Anything you can think of is greatly appreciated because at this point I'm completely clueless. And worth to note, I'm really new to javascript!
Here are my javascript code thus far:
...ANSWER
Answered 2022-Jan-16 at 20:33Your issue is that your cart
is only storing the following information in key-value pairs: the key is the product name, and the quantity is the value. There is no price information in the cart
object at all, therefore computing it requires looking up the original products
array.
Moreover, count
and total
are declared outside the buy()
function, yet the function, when invoked, does not update these values. These values are only set at runtime and is not updated after.
Therefore the quickest solution is to rewrite your buy()
function into something like this, while removing the countCart()
and totalCart()
functions:
QUESTION
I have a script that used to work for calculating zonal statistics (median), but now I get the AttributeError: 'DatasetReader' object has no attribute 'affine'. Here is my code:
...ANSWER
Answered 2022-Jan-13 at 21:13affine
has been deprecated. transform
now accepts GDAL and Affine style transforms.
From Migrating to Rasterio 1.0 affine.Affine() vs. GDAL-style geotransforms:
https://rasterio.readthedocs.io/en/latest/topics/migrating-to-v1.html
Since the above changes, several functions have been added to Rasterio that accept a transform argument. Rather than add an affine argument to each, the transform argument could be either an Affine() object or a GDAL geotransform, the latter issuing the same deprecation warning.
The original plan was to remove the affine argument + property, and assume that the object passed to transform is an Affine(). However, after further discussion it was determined that since Affine() and GDAL geotransforms are both 6 element tuples users may experience unexplained errors and outputs, so an exception is raised instead to better highlight the error.
QUESTION
Is there a way to regex from digit to digit?
I have this tracklist:
...ANSWER
Answered 2021-Dec-25 at 19:17You can use
QUESTION
ANSWER
Answered 2021-Dec-09 at 14:53Assuming the three arrays are always keyed identically, use a single loop:
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