Create a multiplication table application where user will enter a sentinel value n and the application will display the mathematical multiplication tables till given sentinel value n.
For example, if user enters n = 4 then application will display the multiplication tables of 2, 3, and 4.
Constraint:
• Make use of oop concepts class methods and attributes
Related
What I am trying to achieve:
In an Web App (Blazor Server), we generate some documents.
Each document, should have a unique sequence number.
The Sequence Number must be between X and Y, where Y always > X.
The Sequence Number (X and Y) is set at the beginning of each year by a Superadmin.
The values are saved in a SQL Server or PSQL database, via EF Core 6.
Normal Flow:
First document is generated : gets the ID 1.
Second document is generated from the app : gets the ID 2.
Last document is generated from the app : gets the ID Y.
Last document + 1 > gets an error.
Now, my only problem is: how can I treat concurrent calls?
What happens if in the same millisecond two users try to get the same Id?
Can SQL guarantee to me that each one will have the next Sequence Number?
I need help programming a process in AnyLogic.
I want to assign a specific number to an Agent (50%=1,20%=2,30%=3). And later I want to use the number to add to a stock.
For example: if the Agent has the number 3 I want the stock (variable) to go down exaclly this amount.
I tried using a Parameter on the Agent, but I am only able to create a string and with that I can't calculate later…
I would be very happy if anyone knows a solution to the Problem! :)
Here is a simple solution for your case:
set the parameter type to "int"
Assign the initial value according to your probabilities, as below. Note that for numbers 2 and 3, it is a relative probability, given that it was not drawing value 1
Each agent instance will draw a number between 1 and 3 now (50% 1, 20% 2 and 30% 3). Then, you can do your stock adjustments with that param
I am trying to build an automatic feature for a database that takes NOAA weather data and imports it into our own database tables.
Currently we have 3 steps:
1. Import the data literally into its own table to preserve the original data
2. Copy it's data into a table that better represents our own data in structure
3. Then convert that table into our own data
The problem I am having stems from the data that NOAA gives us. It comes in the following format:
Station Station_Name Elevation Latitude Longitude Date MXPN Measurement_Flag Quality_Flag Source_Flag Time_Of_Observation ...
Starting with MXPN (Maximum temperature for water in a pan) which for example is comprised of it's column and the 4 other columns after it, it repeats that same 5 columns for each form of weather observation. The problem though is that if a particular type of weather was not observed in any of the stations reported, that set of 5 columns will be completely omitted.
For example if you look at Central Florida stations, you will find no SNOW (Snowfall measured in mm). However, if you look at stations in New Jersey, you will find this column as they report snowfall. This means a 1:1 mapping of columns is not possible between different reports, and the order of columns may not be guaranteed.
Even worse, some of the weather types include wild cards in their definition, e.g. SN*# where * is a number from 0-8 representing the type of ground, and # is a number 1-7 representing the depth at which soil temperature was taken for the minimum soil temperature, and we'd like to collect these together.
All of these are column headers, and my instinct is to build a small Java program to map these properly to our data set as we'd like it. However, my superior believes it may be possible to have the database do this on a mass import, but he does not know how to do it.
Is there a way to do this as a mass import, or is it best for me to just write the Java program to convert the data to our format?
Systems in use:
MariaDB for the database.
Centos7 for the operating system (if it really becomes an issue)
Java is being done with JPA and Spring Boot, with hibernate where necessary.
You are creating a new table per each file.
I presume that the first 6 fields are always present, and that you have 0 or more occurrences of the next 5 fields. if you are using SQL Server i would approach it as follows,
Query the information_schema catalog to get a count of the fields in
the table. If the count= 6 then no observations are present, if 11
columns ,then you have 1 observation, if 17 then you have 2
observations, etc.
Now that you know the number of observations you can write some SQL
that will loop the over the observations and insert them into a
child table with a link back to a parent table which has the 1st 6
fields.
apologies if my assumptions are way off.
-HTH
I'm having a very curious Problem in QlikView.
I have a number of readouts from a Database which show certain amounts of time in a different state.
In that table there are 49 variables that describe the state, there are 7 levels of i.e the SOC and seven states of the Temperature.
i.e the one of the fields could be named: SOC1_T1 or SOC2_T1 and so on...
So what i get is a table full of readouts in which every i have an specific id for the object, the state of the variables and an age. There are multiple entries per Object.
What i want to do is to plot a two dimensional diagram over all the states so i get SOC over Temperatur Histogram(Average of the maximum (or newest) value of every object).
I tried creating to Dynamic (or syntethic) Dimensions (ValueLoop(1,7) and ValueLoop(1,8).
In the formulas i reffered to them with
=If(ValueLoop(1,7) = 1 and ValueLoop(1,8) = 1,
(avg(aggr(FirstSortedValue (SOC1_T1
, -age), id)) * 100))
and created 49 Formulas with each state variable output.
Problem now is:
It only shows the first entry. I can replace the whole expression in the if condition with a specific number (100) and get a result. I also plotted the inner expression into a Listbox and checked wheter the result is not null.
As soon as I delete the aggr function and just take the AVG over everything (which is not what i want). Everything works fine. When i turn back to aggr, only the first one is shown.
Doesnt help by the way when i delete one of the dimensions, this doesnt work one dimensional either.
Any ideas or workarounds?
Greetings
Julian
I'd like to store data from actual graphs. in other words we might the following for example:
paper: smith
finance type: outgoings
time | 0 10 20 30 ... etc
amount | 10 22 31 44 ... etc
I would like to store the variables paper, finance type and for each the graph data given by time-amount. there will be other variables also (note the above example is fictional)
I'm not here to get solutions although I hardly know anything about databases. Would like to get started. When I type in Google 'store data from graph in database' all I get is information about sql graph types, node etc. I need just some direction for the actual tools to use (MySql or another database type? XML?). I will eventually want to extract the graph data of person and use that information. Google is not being my friend at the moment and I don't know who to ask personally
The database wouldn't be that big but will eventually run into 1000s of entries.
It is possible to model this in a database, but if you hardly know anything about them, you should start learning a bit about ER schema's, normalization (just up to third normal form) and the basic DDL and DML queries.
Anyway, possible model with two tables:
TABLE 'graphs'
- ID
- paper
- finance type
TABLE 'graphdata'
- ID
- GRAPH_REF
- TIME
- AMOUNT
In your table graphs, you put 1 line for each graph you have. You might have a graph for 'smith, outgoings', one for 'smith, incomings', one for "deloitte, reports"... that would be three lines. The ID is just a counter.
In the table 'graphdata', you put 1 line for each data point. Again, the ID is just a counter. The GRAPH_REF is the ID of the graph in the 'graphs' table where this data-point belongs to.
So for your example, you'd have the following graphdata rows:
1 - 1 - 0 - 10
2 - 1 - 10 - 22
3 - 1 - 20 - 31
4 - 1 - 30 - 44
Are you following so far? Now you can make a webpage (or an application, anything you can program that can work with SQL - even Excel or Access will work) that gives a user the choice to create a new graph, or select an existing graph.
Creating a new graph would insert a new row in the 'graphs' table. Then, for each data point, you put a new row in the 'graphdata' table.
When they select an existing graph, you fetch the data points from the graph, and display to them. Maybe they can add/delete points?