IpMap | HTML5 browsable IP map inspired by http : //xkcd.com/195/
kandi X-RAY | IpMap Summary
kandi X-RAY | IpMap Summary
HTML5 browsable IP map inspired by http://xkcd.com/195/
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QUESTION
I'm learning how to use Boost-graph library for a university project. I have a graph where I need to add and remove vertices, so I declared my adjacency list with listS as vertex list. I have a big problem with the call of depth_first_search() function: because of listS, I need to provide a Indexes Property Map, but I don't understand how I need to procedes. Here's the code:
...ANSWER
Answered 2020-Jan-06 at 16:25The named parameters are not given correctly. They use Fluent Syntax:
QUESTION
I am trying to whitelist IPs dynamically to grant access to a specific directory. A php script will be constantly modyfying the whitelist.txt file to add/remove entries.
I know the proper way handle this is with RewriteMap, but I am not sure how to set this up.
For example, I want users to access my site normally when they visit example.com, however I want to deny access to ALL users visiting anything in the block path/directory "http://example.com/block" EXCEPT for those IP addresses in whitelist.txt, additionally, those IP addresses in whitelist.txt will only have access to a specific folder and file inside the "block" directory, request e.g:
http://example.com/block/123/123.txt
I have tried the code below (this is a rough sketch, it is completely off and wrong I am sure, but just to get the idea):
...ANSWER
Answered 2018-Dec-10 at 12:39I've played around a bit starting from your rules and got to this:
QUESTION
What is the advantage using Akka Actor over normal File operation method?. I tried to calculate the time taken to analyze a log file. The operation is to find the IP addresses which have logged on more than 50 times and display them. Normal file operation was faster when compared to Akka Actor model. Why so?
Using normal file operation
...ANSWER
Answered 2018-Feb-21 at 17:44With all concurrency frameworks there is always a trade-off between the amount of concurrency that is deployed vs. the complexity involved for each unit of concurrency. Akka is no exception.
In your non-akka approach you have a relatively simple sequence of steps for each line:
- read a line from the file
- split the line by '-'
- submit the ip address into a hashmap & increment the count
By comparison, your akka approach is much more complicated for each line:
- create an Actor
- create a
LogLineMessage
message - send the message to the actor
- split the line by '-'
- create a
LineProcessingResult
message - send the message back to the coordinating actor
- submit the ip address into a hashmap & increment the count
If we naively assumed each of the above steps took the same amount of time then you would need 2 threads with akka just to run at the same speed as 1 thread without akka.
Make Each Concurrency Unit Do More Work
Instead of having 1 Actor
per 1 line, have each actor process N lines into its own sub-hashmap (e.g. each Actor processes 1000 lines):
QUESTION
I had a BaseModel of table defined like this:
...ANSWER
Answered 2018-Feb-21 at 01:00I am not sure whatever you are trying to do will work, as combining complex classes from complex hierarchies is in no way guaranteed to work.
In this case, although you don't mention it, you are trying to combine db.Model
which I take to be the class used by flask_sqlalchemy with sqlalchmey.table - both classes are "full of magic tricks" and this include that each have a different metaclass.
Python won't instantiate classes that inherit from independent metaclasses - instead you will get the "metaclass conflict" error you just saw. But, if metaclasses are written in a way that it is possible that they are collaborative, it is a matter of combining both metaclasses, which can be done in a single line of code.
Looking at the source code for the metaclass of sqlalchemy.Table
, which is VisitableType
in this file, we see that it indeed makes use of super
where it matters. That should be all it takes for the class to be collaborative - although one can't be sure that there won't be conflicts in attribute names or other custom mechanisms implemented by the metaclasses.
Anyway, that checked, all that is needed for your code to build and you be able to inherit from both classes is to create the combined metaclass:
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