Questions tagged [data]
Data are values of qualitative or quantitative variables, belonging to a set of items. Data in computing (or data processing) are represented in a structure, often tabular (represented by rows and columns), a tree (a set of nodes with parent-children relationship) or a graph structure (a set of interconnected nodes).
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How do I store a trie in memory in a Spring Boot Application?
I have a spring boot application, that simply does, takes a set of characters and lists out possible english words.
Now, as everyone knows , its fairly easy, build a trie data-structure to load up a ...
5
votes
3answers
494 views
Is it anti-pattern to have inheritence in a dto?
Are data transfer objects or POJOs meant to be final or can they be extended and create hierarchies for them?
It is not clear to me if such a value class is properly designed only as a final class and ...
0
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3answers
248 views
Do higher order functions violate the separation of data and code principle?
I am asking here something that is really haunting for years (for real !).
I guess in a "perfect world", we would have programs made of data models and functions, and those functions manipulate data ...
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votes
1answer
51 views
is using redis correct to hold a dataset?
[Have restructured the question]
We have a lot of DB readers and few writers where writers may perform longer operations. This is a real-time system so the read has to be performed as efficiently as ...
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1answer
62 views
Why does putty store sessions in the registry? [closed]
I recently wanted to copy my putty config from one laptop to another.
I figured there would be a directory somewhere which stored the IP addresses etc as some form of text file. I was surprised to ...
0
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1answer
83 views
Recommended Long Term Data Storage Format
I have an application (written in Go) with a lot of GPS location information. Each record consists of a latitude and longitude plus somewhere around 50 fields of various pieces of meta data, some of ...
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votes
1answer
48 views
How to detect that internal hard disk is removed and which files were copied? [closed]
Its easy to steal internal hdd, which do not generate sound signals to aware the owner while removing and allows Thief to copy the data.
Is there any way by which these thieves acts can be traced.
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2answers
68 views
Correct place to store semi dynamic data
What I mean by semi dynamic data are data that are expected to be changed only with product versions.
Now imagine this scenario, In version 1 of the product, I have item status : SUCCESS , FAIL
In ...
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vote
2answers
45 views
Architecture of “tags” for contacts in a marketing system and hard-coded IDs so functions can refer to them
I have these tables: contacts, tags, contact_tags.
(contact_tags has columns contact_id and tag_id.)
Administrators can manually create new tags via an internal website.
Administrators can also ...
2
votes
1answer
36 views
Data modeling user-object permissions, between claims and metadata
I've been thinking about how to map user claims to permissions in a way that scales from a read and write perspective, probably using a stand-alone service. What we have today doesn't scale for ...
0
votes
3answers
121 views
Techniques for Cleaning/Expiring Old Data
I have a database with data that "expires" in a way -- after 10 days, the status changes from "Completed" to "Archived" and after 30 days rows still marked as "Assigned" get unassigned, for various ...
0
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2answers
91 views
Is it possible to transfer data with a really unique seed of a psudo random number generator
I have thinking about this idea for over 5 years and i don't have the complete technical knowledge to fully grasp the idea I'm having.
The premise of the idea is to have an extremely high base number ...
3
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3answers
261 views
What is the most effective algorithm to evenly distribute n points on a 2 dimensional array so they are as separated as possible?
I am trying to code a game which currently uses a matrix ( that I am calling a map). On this map are islands which can be generated n times. The purpose of the algorithm is to distribute the islands ...
2
votes
1answer
34 views
Setup pipeline to analyze data stored in web app DB
Background:
So there is a (Ruby) web app with a production Postgres DB (hosted in the cloud)
I would like to run some machine learning algorithms in a Python setting on the production data and (...
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votes
3answers
270 views
Is it an ok practice to keep pointers dereferenced?
For me, I prefer having all my variables, not as pointers. Is it ok to keep all heap-allocated variables dereferenced?
For example:
#include "Foo.hpp"
#include "Bar.hpp"
class Foo {
private:
Bar* ...
0
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1answer
67 views
Reliable data synchronisation between several systems
We have several systems that hold the same data in different databases. The requirement is to keep the data synced in as much reliable way as possible. Performance isn't a concern because we don't ...
2
votes
1answer
37 views
At what size array in Swift would you consider switching to CoreData?
I've developed a reading tracking app in Swift and for simplicity's sake I used arrays for my model. It stores some data about the books a user reads and a small image of the cover. I save them to ...
0
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1answer
102 views
Encoding of timestamps over cosmological time (64-bit linear vs 32-bit logarithmic)
I understand this is the place to ask questions pertaining to software design. If my question is considered to opinion-based, is there a forum or something better suited for the discussion?
...
3
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1answer
124 views
Arranging blocks of data for efficient memory access
suppose I have an algorthm that has N blocks of data, and an operation needs to be performed on all blocks such that requires 2 blocks to be in memory at any given time to be done for all possible ...
2
votes
1answer
106 views
Is it possible to create once loadable files?
I know very little about encryption, so I figured I'd ask the internet if it's possible to do the following (and if so, what kind of algorithm should I be looking at):
Write some code that saves data ...
2
votes
1answer
105 views
Generic way to describe data synchronization between systems?
Is there a generic way (useful formalisms) to think about data synchronization between two systems, especially in the case of slightly asymmetric roles (eg, one system contain master data, another one ...
0
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3answers
186 views
Getting random yet consistent data for testing
I have a big codebase yet to be covered with tests and rather limited access to the real data.
The code that needs to be covered is very data dependent. And the data is anything but shallow and ...
4
votes
1answer
88 views
Maintaining parallel libraries: Binary files access + Metadata Database ORM design
I'm dealing with a higher-level data abstraction that I would appreciate some input on.
I'm working on an application that uses a large data lake. The data lake is consisted of thousands of large ...
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1answer
40 views
How should I update back-end data (e.g. follows, likes, etc.) which changes at an inconsistent rate?
(This is a conceptual question but as reference, I'm using Android Studio (Java) and Firebase Firestore...)
My app currently has a structure where the user can follow authors and favorite their works....
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1answer
64 views
Formula Parsing
I have created an application to import CSV files, each CSV file that the application imports can contain different data, with new formats of the CSV files being added in the future. Rather than hard ...
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2answers
146 views
Is this data as a result of business logic or is this content as a result of GUI logic?
I'm aware of the general distinction between data and content, namely context, but here I have a case that is clearly causing a lot of confusion and debate within the company I work for.
There is a ...
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1answer
54 views
Data Matching In VBA - Best way to deal with dynamic data and user entry?
Background
I am currently building this project with VBA, just to keep in the back of your mind when thinking about my question.
Imagine 2 adjacent blocks, in Excel. The first block is made up of ...
3
votes
1answer
153 views
Design of file I/O -> processing -> file I/O system
I'm in the process of designing a new desktop application which is very different from other stuff I did before, and so I'll be happy if I could be pointed towards the right direction regarding the ...
2
votes
5answers
307 views
Which layer should have responsibility for rounding numbers?
I am developing a financial system and want to have a defined policy for rounding monetary values.
Given the following layers:
View
API
Entity Model
Persistence
If I am passing a monetary value ...
4
votes
2answers
269 views
Game Playing AI - Strategy to overcome the transposition table taking up too much memory?
I've made an engine that plays Connect Four using the standard search algorithms (minimax, alpha-beta pruning, iterative deepening, etc). I've implemented a transposition table so that the engine can ...
4
votes
1answer
177 views
Self describing data with UI
I have a use case where my team owns a web UI to aggregate data from 10+ service teams and present it to the customer in order to collect more information . This data (which is in json format) is very ...
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votes
6answers
637 views
Is there a programming term that means property or field?
I think this question can span multiple languages, but in C# specifically there is a clear distinction between a field (ex: private int a;) and a property (ex: private int b { get; set; }). While ...
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1answer
52 views
Dictionary Coding for OLAP
Let's say we have a generic table like below:
id, name, price, quantity
20 product_x 5,00 100
20 product_y 5,00 100
20 ...
0
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2answers
73 views
Should / When to create javascript object to serialize data?
I'm working on a React/Redux application. I receive a data object from the api resembling this:
const dataObj = [
{
id: 1,
name: "Filo",
activity: 9,
info: {
statusCode: 4
...
0
votes
1answer
131 views
Improvements in a “data - manager - wrapper” architecture
I have programmed using the architecture below, where "client, order, piece" are just data classes, have no methods, and "managers" are the manipulators of that data, the "ClothingStore" is a wrapper ...
3
votes
1answer
115 views
Regulations about collecting data from software running at clients hardware (apps 'phoning home') [closed]
We develop an application which has now been installed on a few thousand customers sites.
Unfortunately, we have no customer data collection built into the software. This is something we want to ...
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votes
2answers
54 views
database/orm model design for contacts
I am building a internal crm which has contacts which are just people with first name, last name, email, phone etc. Contacts can be one or more types e.t.c. job candidates, hiring managers, customers, ...
2
votes
2answers
192 views
Cumulative sum of overlapping increase/decrease over time
I am looking for an efficient way to handle a calculation. I have lots of timestamped events, representing loading and unloading of trucks. I need to construct the filling rate of these trucks over ...
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vote
2answers
432 views
How to find matching profiles?
I'm developing backend for a dating app, in which each user has
a profile of his/her characteristics
a profile of ideal match's characteristics
There are dozens of characteristics like gender, ...
1
vote
0answers
64 views
separate table for one of the type or java enum?
I want to make budget tracking web-app, tracking all savings and expenses with corresponding dates. Later generating reports, summaries etc..
I came up this design
Frequency Table - does it have to ...
1
vote
2answers
230 views
Distributed training of many small ML models
I have a data science application that involves training tens of thousands of small individual Gaussian models. By "small", I mean that any individual model can easily be trained on one of our worker ...
1
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0answers
58 views
How can I offload customer's data needs onto the customer?
I write code for an Engineering application where engineers keep giving me various specs in a form of tabular data - for example, a table with product model names and many various parameters for each ...
5
votes
2answers
4k views
File storage microservice design
Problem overview:
I'm creating a spring application just for learning purposes. I would like to create a microservice just for files, which:
at the beginning would have only two basic endpoints ...
3
votes
3answers
241 views
How to store external numeric IDs - as strings or as integers?
Every now and then we programmers need to communicate with external systems (not under our own control). It's frequent that in such cases we need to keep track of some sort of identifiers that these ...
0
votes
1answer
560 views
Battery level prediction model
I have the idea of develop a model that predicts the battery charge level of my system for now until the following 5 days. The battery is charged using a solar panel. I am writing my code in Python 2....
1
vote
1answer
155 views
Which datastructure to use for temporary storage of intermittent and asynchronous sensor data?
Here an outline of the setup:
Input data:
I have several sources for sensor input data (GPS, and a bunch of other sensor data from different sources).
All of those individual inputs consist of a ...
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2answers
681 views
data vs business logic
Today my manager said: 'Amir, don't mix the business logic with data in database'.
I surprisingly shocked! I said 'Where?'.
According to wikipedia business logic is:
In computer software, business ...
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2answers
74 views
How to structure an application (and its user interface) such that extraneous and/or malformed data can be handled?
I recently applied for a position as a software developer. As a part of the recruitment process, I was given an assignment that involves reading data from a file.
The thing is that the example file ...
3
votes
2answers
157 views
Does Wikipedia Store Every Edit Page? [closed]
I am not sure if this is the best place to ask this question, but I was looking at a Wikipedia article and noticed there were a lot of edits for that article. Since you can view each edited iteration ...
1
vote
1answer
112 views
Are data attributes good identifiers of certain blocks of HTML code?
I have a complex environment which is mostly oriented around / ends up spitting out blocks of HTML, which make up the entire page.
Now, I need a way to "point and click" identify any block on my page ...
