Why Beat ’em Ups don’t allow players to face toward or away from the screen

Most Beat ’em Ups don’t allow players to face away or towards the screen: example, in Streets of Rage, when you press up, the character moves up but still facing either left or right and same goes when you press down. Even in modern Beat ’em Ups, this is the case. What is the reason for this? I used to think this is because the graphics are 2D so its harder or more work to get characters to face towards or away from the screen. But even in Beat ’em Ups that uses 3D graphics, this is still the case, like Double Dragon Neon.

One more thing, if you know any Beat ’em Ups that does do this, can you post the name of the game here. I am interested on how that behaves.

Using Cache to make website faster

I am building a website with node.js express webserver and i use Mongo db database.

On my website people can register a profile they can upload pictures and write text.

Now i hear often that many things can be load from a cache then the website run faster.

Now i ask myself if i need to code something into my script to make for example the Mongo db use cache for requests or if i need to code anything to make the browser or webserver to use pictures from cache.

Can somebody help me to understand this cache thing?

How to build a specialized chat platform

I am building a website and I have hit a road block. What I am wanting to do is have customers create a profile that includes a survey. Once a customer answers the questions to the survey and creates their profile I want them to be routed to a chat feature where they become a lead to one of my employees. I need my employees to be able to access the info from the survey through the customers profile. I also need my employees to be able to add items to customers carts so the customer can make purchases. It would be awesome if we could get statistics to how many times the customer views the items we share and their cart. Any help or advice would be much appreciated.

Select list of attributes that exist in all groups

select distinct(p) from Pub; /* phdthesis article proceedings incollection inproceedings www book mastersthesis */ select * from field limit 20; /* tr/meltdown/s18,0,author tr/meltdown/s18,1,author tr/meltdown/s18,2,author tr/meltdown/s18,3,author tr/meltdown/s18,4,author tr/meltdown/s18,5,author tr/meltdown/s18,6,author tr/meltdown/s18,7,author tr/meltdown/s18,8,author tr/meltdown/s18,9,author tr/meltdown/s18,10,title tr/meltdown/s18,11,journal tr/meltdown/s18,12,year tr/meltdown/s18,13,ee tr/meltdown/m18,0,author tr/meltdown/m18,1,author tr/meltdown/m18,2,author tr/meltdown/m18,3,author tr/meltdown/m18,4,author tr/meltdown/m18,5,author */ 

pub and field join on column k (primary key)

I want to write a query that returns only those attributes (author/journal/year etc.) that have at least one record in every publication type: phdthesis, book, etc.

Adding arbitrary data via wp_style_add_data?

I stumbled across wp_style_add_data while reading though someone else’s code. I can see a list of keys that the function accepts and trying to add my own data-foo for example didn’t product any output however title did

Is there a filter to add any arbitrary key into this function? I tried following the source down but didn’t find anything

Having trouble managing projects, duplicating, deleting, restoring..

Hey folks, I am having trouble with GSA SER since I started playing with it again in the last few weeks. 

I try to duplicate a project and it simply does nothing. 

When I delete the project it also does nothing. 

And when I am trying to load a template (.ser file) it says the project already exists and asks me to append, overwrite, or skip. It doesn’t matter which option I choose – it doesn’t do anything. 

I tried to rename the previous project using that template and it worked to rename it, but I still get the popup saying that the project already exists and asking to overwrite, append, skip, etc. 

It doesn’t seem to matter what I do, I can’t get around these problems. 

I try to modify a project and nothing happens. 

Am I doing something wrong or is there something funky going on with GSA? 

Large and infinite sums evaluated numerically

I am interested to learn when and how Mathematica is able to evaluate large/infinite sums numerically in reasonable time. I have found that it can evaluate $ $ \sum_{l=1}^{\infty}e^{il/2}H_{0}^{(1)}(l) $ $ or any finite truncation of this in a fraction of a second:

NSum[Exp[I 0.5 l] HankelH1[0, l], {l, 1, 10000000000}] NSum[Exp[I 0.5 l] HankelH1[0, l], {l, 1, 100000000000}] NSum[Exp[I 0.5 l] HankelH1[0, l], {l, 1, 1000000000000}] NSum[Exp[I 0.5 l] HankelH1[0, l], {l, 1, Infinity}] 

How is it able to do this? I’m not aware of any exact formula for this sum (if there is one please let me know!), and the sum doesn’t even converge very rapidly, with the terms dying off as $ O(1/l^{1/2})$ in absolute value.

Thanks in advance for any help.

“Percona-XtraDB-Cluster prohibits use of ALTER command on a table () that resides in non-transactional storage engine”

I installed a Percona XtraDB cluster with pxc_strict_mode set to ENFORCING, and am trying to import databases from non-Galera MariaDB servers. This works fine for some databases, by dumping them via mysqldump --skip-locks -K and importing them via mysql <database> < <dumpfile> (after creating a blank database using CREATE DATABASE). One database however is refused the import:

ERROR 1105 (HY000) at line 40: Percona-XtraDB-Cluster prohibits use of ALTER command on a table (example.example) that resides in non-transactional storage engine (except switching to transactional engine) with pxc_strict_mode = ENFORCING or MASTER 

Most internet threads simply suggest temporarily disabling pxc_strict_mode. Given however that other databases import without any issues, I assume the issue should be resolvable by altering either the the flags appended to mysqldump, or modifying the statements inside the dumpfile. I attempted removing all ALTER statements in the dump, which changes the above error to ...prohibits the use of DML command....

Both, the source MariaDB instance, as well as the new XtraDB Cluster, are configured with the default InnoDB storage engine.

Would appreciate any input.