peds | Type safe persistent/immutable data structures for Go | Functional Programming library
kandi X-RAY | peds Summary
kandi X-RAY | peds Summary
Statically type safe persistent/immutable/functional data structures for Go. Inspired by Clojures data structures and the work done in Pyrsistent for Python. This is an experiment in how close to generics that code generation can take you. There's currently a vector, a slice, a map and a set implemented.
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Top functions reviewed by kandi - BETA
- main is the main entrypoint .
- renderCommon renders the common DSL for the package .
- renderSet renders a set of sets
- renderMaps renders the given maps into the given buffer .
- renderVectors renders a vector template .
- writeFile writes the given buffer to file .
- parseSetSpecs parses a set spec string into a set spec
- parseMapSpecs returns a list of map specifiers .
- renderTemplates is a helper function that takes a list of templateSpecs and writes it to dst .
- parseVectorSpecs returns a list of vector specs .
peds Key Features
peds Examples and Code Snippets
Community Discussions
Trending Discussions on peds
QUESTION
I'm trying to loop over an integer array using a lambda template.
The code to invoke the lambda would look something like this (demo purposes, not functional code):
...ANSWER
Answered 2022-Feb-11 at 23:24The example you have shown is more C# than C++, as far as the lambda syntax is concerned. But even then, the example is clearly passing the lambda as a parameter to allpeds()
, and the lambda itself takes an input parameter, too. allpeds()
is not returning an array that the lambda then iterates, allpeds()
calls the lambda passing it each integer value as needed.
In C++, you can use something like this:
QUESTION
I am an Engineering Student and as part of my diploma thesis, I am simulating the passenger changeover process in metros using the Anylogic Pedestrian Library.
In the simulation, it often happens that standing passengers "leave" the standing area and somehow get into the sitting places, blocking the way from other peds that would like to occupy the seat.
All passengers come from the Passenger Agent, where they have a boolean variable wantToSit. If wantToSit = false, they are routed into the standing area, with wantToSit = true they go to take their seats.
Now, I would like to restrict the access of peds with wantToSit = false into the area drown using polygonal nodes around the seat groups, so that the phenomenon written above cannot occur, thus only sitting passengers will enter this area.
However, when I try to define the condition for the access restriction in the polygonal Node, I always get the error "... cannot be resolved to a variable".
Here is the variable from the Agent "Passenger":
On the Agent "Main", where the Polygonal Node is, the auto code complete does not recommend anything for want
or for ped.
. For the word Passenger
, see the picture below:
Is there a way to use the access restriction feature in this case? I don't know how to access this parameter of Passenger from Main, which is a different agent.
Thank you in advance for your help!
...ANSWER
Answered 2021-Aug-20 at 05:54If you do the code complete action in the condition field before you type anything, you will see that the local variables available for you to use in the condition field is agent
and self
And then if you choose agent
you will see that the fields within your custom Pedestrian agent will become available.
Try not to type anything without code complete. It can save you a lot of time.
QUESTION
Edited Version: I'm actually modelling an airport check-in terminal. It works fine so far, but additional I'm still trying to implement a function, that allows my pedestrians not to enter the service-queue if the queue time exceeds a preselected value (e.g. already 15 Passengers in the queue) and therefore walks to some kind of backup Service that opens during this busy times.
Here is my approach:
- Variable
QueueSize
returns permanently the actual Number of Passengers in the Queue. - Every time a ped enters the pedservice block
CheckInEco
, the functionwaitingTime()
starts:
ANSWER
Answered 2021-Nov-29 at 12:02You can simply use a select output block to prevent pedestrians from going into the service block if there are more than 16 pedestrians already in.
Your original question had to do with waiting time, you should follow the exact same approach. But with waiting time it gets more complicated since you don't want to take the average waiting time from the start of the simulation.... so you need to decide if you want to take the last 10 minutes, 1 hour etc and do you want to include the current waiting time of agents in the queue. Since this is the the questions anymore I am not going to add it here, perhaps ask a new question if this is still the case.
QUESTION
ANSWER
Answered 2022-Jan-06 at 20:26There are PERCENTILE_CONT(for continues values), PERCENTILE_DISC(for discrete value)
methods in Sqlserver 2012 for doing that. you can read more about it here.
QUESTION
3 of the columns of my dataframe involve medical specialties, I am trying to do a isin on if column1 is in column2, its true... if column2 isin column 3 its true. so the expression would be true. I am also factoring out for nulls, and if everything matches. Swapping the Or between the first line to and & either gives alot of false positives, or seems like it doesnt do anything. The 2nd and 4th line should also be correct.
Dataframe https://i.stack.imgur.com/IqqaZ.png how it looks after doing the formatting.
...ANSWER
Answered 2021-Nov-29 at 18:05Try with apply
and in
:
QUESTION
I have data from a drone. The first table has the pedestrians' data in each frame. The pedestrians' data has the pedestrian Id, frame, x_est, y_est, v_abs. The second table is the vehicles' data. The vehicles' data has the vehicle Id, frame, x_est, y_est, vel_est. For example, in frame number 1, I have 39 pedestrians and two vehicles. I want to create a new table that has the following information:
the first column is the distance between each pedestrian and every vehicle in each frame. For example, I have 39 pedestrians and 2 vehicles:
d1 = sqrt((ped1_x - veh1_x)^2 + (ped1_y - veh1_y)^2)
d2 = sqrt((ped1_x - veh2_x)^2 + (ped1_y - veh2_y)^2)
d3 = sqrt((ped2_x - veh1_x)^2 + (ped2_y - veh1_y)^2)
d4 = sqrt((ped2_x - veh2_x)^2 + (ped2_y - veh2_y)^2)
and so on
- the second and third columns are the associated speed of the pedestrian and vehicles. For example, if i get d1 then I have to include the speed of ped1 and speed of veh1. If i get d2, then I have to include the speed of ped1 and speed of veh2 and so on.
I have 116 frames. I want to write code in python or Matlab to do these tasks. I tried python with the following code but didn't work because the vehicles' data has 182 rows and the pedestrians' data has 3950:
...ANSWER
Answered 2021-Nov-25 at 20:45Just think through the problem in words. For each pedestrian entry, for each car entry, if the frame number matches, compute the distance between them, and add a new row. Nothing to it.
QUESTION
I am simulating the passenger changeover process in metros using the Anylogic Pedestrian Library.
When passengers enter the vehicle, a seat is assigned to them from the seats available near the door (within a given distance) they entered the vehicle through, using a function called lookForSeat. If there is no more free seat available, their boolean parameter wantToSit is set to false and they will stay standing.
The parameter wantToSit is predefined for the Passenger Agent, with default value randomtrue(0.8). But even if I set it to default value = 1, I get the same error.
Then, passengers are separated using a PedSelectOutput block:
- Condition 1: if ped.WantToSit = true --> they are sent to their assigned seat coordinates (PointNode 'seatPoint', null by default)
- Condition 2: true (thus, ped.WantToSit = false) --> they stay in the standing area in the vehicle, no assigned seatPoint necessary in this case.
Now, it works pretty well, but when the majority of the seats is already occupied, suddenly the PedSelectOutput block directs a passenger with ped.wantToSit to its seating point, which gives null and I get the NullPointerException error.
Attached you find the function, the settings of PedSelectOutput and the log from the command.
As it can be seen, the PedSelectOutput sends the passenger through exit 1 (which gives the error due to calling the coordinates of a "null"), despite ped.wantToSit = false.
Any ideas, what is going wrong? For me it really looks like the function is working properly - I have been changing it the whole day until I realized that something in the PedSelectOutput block goes wrong.
Thank you in advance!
Pic 1: pedSelectOutput block and the command with the log
Pic 2: the function lookForSeat assigning the seats from the seat Collection
...ANSWER
Answered 2021-Aug-11 at 07:04The problem here is a subtle one, which has caused me many hours of debugging as well. What you need to understand is that the on exit code is only executed once the agent already has a path to which it is going to exit. i.e. the selectOutput and subsequent blocks are already evaluated and only once it is determined that the agent can move to the next block then the on exit code is called. But the agent will continue on its chosen path that has been determined before the on exit code has been executed.
See the small example below:
I have a pedestrian with a variable that is true by default and a select output that checks this value
If I ran the model all pedestrians exit at the top option, as expected
If I change the variable to false on the On Exit code I might expect that all pedestrians will now exit at the second option
But they don't there is no change....
If I add the code to the on enter code then it does..
QUESTION
I found this answer and tried this:
...ANSWER
Answered 2021-May-30 at 14:56This ended up working for me (inserted into the terminal)
QUESTION
I want to change my data so that it gives me the rate of pedestrians to that states population. I am using a linear model and my summary values look like this: Coefficients:
...ANSWER
Answered 2021-Apr-19 at 14:12Collating my answers from the comments: you need to get state population data from an outside source such as the US Census https://www.census.gov/data/tables/time-series/demo/popest/2010s-state-total.html#par_textimage_1574439295, read it in, join it to your dataset, and then calculate rate as pedestrians per population, scaled for ease of reading on the graph. You can make your code faster by taking some of your calculations out of the loop. The code below assumes the census data is called 'census.csv' and has columns 'Geographic Area' for state and 'X2019' for the most recent population data available.
QUESTION
The USPTO site offers public data that updates every week. Every time they release new data they release it in a form of " delta data" from the last week. Im trying to download this data using python so I wont have to do it manually every week.
there are a few weird things that are happening:
first, the browser.page_source
holds html (but not the right one - I checked). But when I pass that html (as string) to BeatifulSoup, the soup.current_data
is empty.
Second, the html that is returning is not the full html and does not contain delta
or that section at all, even though it is in the site html in the browser:
Any ideas on how to get that file to download? I need to eventually call the deltaJsonDownload()
js function.
Code to reproduce:
...ANSWER
Answered 2020-Aug-15 at 09:50When you analyse the website network calls, it makes an ajax request to get all the links for the data to download.
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