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 ...

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0
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0answers
28 views

What data should QR-Code contain to serve both my own and external QR-Code reader

My webapplication uses codes (in form of http://www.url.com/code/105820582020204), that I want to encode as QR-Code. I assume that such generated QR-Code will be scanned by both people using my mobile ...
4
votes
3answers
281 views

Big Data: Can it be pre-processed?

My question is about "big data". Basically, big data involves the analysis of a large amount of data to make meaningful insights from it. I would like to know: Whether or not large amounts of data ...
0
votes
2answers
78 views

Data sharing across processes [closed]

I have a C# .NET app that downloads a users Tweets using LinqToTwitter. This is for TV broadcast - the client wants to show Tweets on air. We have two other apps that need to access these tweets. One ...
0
votes
1answer
75 views

Using MVC strictly with DAAB?

I am the only one at my company that is familiar with MVC and they are getting more pressure to modernize and switch to MVC for future projects, so I was tasked to create a template to use as a base ...
3
votes
1answer
92 views

Algorithm that determines relevant attributes in ordered list

Suppose I have a list of objects sorted by a person based on that person's subjective taste. Let's assume that this person is being somewhat consistent in their sorting and that there are quantifiable ...
0
votes
1answer
282 views

Design pattern for configuring objects

Context In a Cocoa application I am developing, I need to load a data model that is defined in plist files. So, I have something like: root (Array) ---- item (Dictionary) -------- name : "objects" ...
1
vote
1answer
280 views

Is it ethical or even legal to track user data/metrics using IP [closed]

This one is a bit tough. It is publicly available information, is it not? But it's can also be used maliciously. So is it legal/ethical to store and/or gather information on users based on IP? It's ...
1
vote
3answers
249 views

Starting with BI / Data Analysis [closed]

We have a bunch of data about our customers and we'd like to learn more about it. Writing queries to pull data out is not a problem, and we're doing that right now, but we'd like to take it to the ...
1
vote
4answers
396 views

Data duplication vs Encapsulating. Which design to use?

The problem that I face is how to combine encapsulating and optimal memory use. I can't show you my code and therefore explain it on extensive (I hope) example. Let's say we need to have a database ...
5
votes
1answer
147 views

Version control and data provenance in charts, slides, and marketing materials that derive from code ouput

I develop as part of a small team that mostly does research and statistics stuff. But from the output of our code, other teams often create promotional materials, slides, presentations, etc. We run ...
2
votes
1answer
1k views

AngularJS dealing with large data sets (Strategy)

I am working on developing a personal temperature logging viewer based on my rasppi curl'ing data into my web server's api. Temperatures are taken every 2 seconds and I can have several temperature ...
0
votes
2answers
75 views

Cleaning a dataset of song data - what sort of problem is this?

I have a set of data about songs. Each entry is a line of text which includes the artist name, song title, and some extra text. Some entries are only "extra text". My goal is to resolve as many ...
-2
votes
1answer
69 views

Turning a problem into a data

OK, I have an app that I'm creating but I'm just really not sure about how to approach the problem. The idea is fairly simple. I'm just not sure how to wrap it in a data model (or even if I should). ...
0
votes
2answers
178 views

Perfomance of 8 bit operations on 64 bit architechture

I am usually a Python / Database programmer, and I am considering using C for a problem. I have a set of sequences, 8 characters long with 4 possible characters. My problem involves combining sets of ...
4
votes
2answers
633 views

Deduplication of complex records / Similarity Detection

I'm working on a project that involves records with fairly large numbers of fields (~15-20) and I'm trying to figure out a good way to implement deduplication. Essentially the records are people along ...
1
vote
1answer
287 views

Consolidating hotels data from various booking sites with different IDs or reference

In one of my projects, I have data for hotels, and other booking sites are able to book this hotel. For example: Hotel A - Booking (ID = 4002), Expedia (ID = 123), Priceline (ID = 147) The three ...
0
votes
0answers
36 views

Program design with multiple data sets, algorithms and results [duplicate]

I have a question regarding the design of my software. The question has already been posted by me at ...
1
vote
3answers
310 views

Program design with multiple data sets, algorithms and results

I have a question regarding the design of my software. There are four different data sets and three consecutive algorithms operating on the data sets and on the results from the previous algorithm ...
2
votes
1answer
451 views

Storing graphs with json and db

I have a Rails 4 app having to do with graphs. These graphs need to be stored and I'm not sure of the best way to do it. Firstly, the app has a SQLite db in development and PostgreSQL in production. I ...
12
votes
2answers
5k views

Data Synchronization in mobile apps - multiple devices, multiple users

I'm looking into building my first mobile app. One of the core features of the application is that multiple devices/users will have access to the same data -- and all of them will have CRUD rights. I ...
0
votes
1answer
240 views

Version-control friendly, append-only file format: “binary” or “text”?

I'm designing an append-only ("journaled") file format, and I'd like it to be friendly towards being stored in VCS (git/Mercurial/...). On one hand, I'd like if after each change, only delta ...
4
votes
5answers
434 views

Should I encrypt files saved by my program

I'm trying to decide on what format I should save data in, and hopefully this question will help me come to a decision. The program I'm writing uses 'databases' in which word=meaning (not a ...
2
votes
2answers
225 views

Why do CSV file formats normally use quoting instead of escaping?

There are a lot of variants of the CSV "standard" (or lack thereof). I've never personally see any that use an escape character (like \) instead of surrounding each field with double quotes. Instead ...
1
vote
1answer
288 views

Best approach for near real time message passing from server to client across router?

I am developing an application which must run on up to thousands of client systems that I control (Linux) which are connected behind common NAT devices to public Internet. Each of these client ...
2
votes
3answers
351 views

Storing data in 2 different systems/database structures

My company is an online retailer, and we use an homebrew ecommerce platform. In the last year or so, we've partnered with a accounting software vendor, as our homebrew solution was unable to produce ...
1
vote
1answer
104 views

Are there any standard for exchanging rules rather than data?

Just out of curiosity. There are many open standards for data exchange, as well as standards for exchanging code (jsonp, for example). But are there any standards for exchanging formulas/rules, for ...
1
vote
2answers
1k views

Radix exchange sort implementation?

I need a little help understanding the implementation of radix exchange sort algorithm. Radix exchange (I don't know if it's the exact name in english based literature) is a lot similar to quicksort, ...
1
vote
2answers
2k views

Dataset with coordinates of borders of countries [closed]

I am creating an application that visually displays world regions, e.g. to place markers within an administrative region. Does a dataset exist with geometrical or geographical (long/lat) descriptions ...
2
votes
1answer
2k views

Why retrieves a native app data faster than one with PhoneGap?

I know that an app developed with PhoneGap is slower than a native one because at PhoneGap the whole code must be interpreted at runtime into a native one. But could someone explain or has a good ...
2
votes
0answers
216 views

Single write, multiple read of stateful objects

Scenario: One data input feed (call this Source) Multiple objects (call these Layer1) read this Source, and analyze the feed. This analysis is stateful. Layer1 objects have configuration parameters. ...
0
votes
1answer
173 views

The best approach to building a mobile service that's also available when the connection drops?

Hopefully this question will be a good suit for P.SE since it is a whiteboard-level 'how can this be done' conceptual question. I'm trying to build a product that needs to be available to someone on ...
1
vote
0answers
121 views

Matching two lists of data with different conventions

I have two lists of data, A and B. These lists are themselves aggregated from multiple sources, and contain typos, abbreviations not found in the other, and also lack a 1-1 mapping, but will never ...
2
votes
2answers
116 views

Looking for session/event analytics analysis tool [closed]

I have data that is basically made up of a set of sessions filled with events. For example: Session1 - [Event1] [Event2] [Event3]...[Event64] Session2 - [Event1] [Event3] [Event4]...[Event64] The ...
-1
votes
1answer
576 views

Data aggregation like polyvore.com [closed]

I'm creating a website that is going to aggregate women shoes from across the web into one website. Kinda like polyvore.com does with all their products but mine is only going to be shoes. Which ...
0
votes
2answers
923 views

Design pattern for data privileges

I'm designing a financial system that should grant access to data based on roles and privileges. For example, a manager can see the financial transaction of users under his domain but not information ...
1
vote
4answers
1k views

Best Practices for Maintaining Uppercase vs Proper Case Data

We have several years of customer data that has been collected over time. I'd guess that 95% of the data (Names, Business Names & Addresses) is in all UPPERCASE format. The data entry tool used ...
3
votes
1answer
267 views

How to process an endless XML data stream

There is an endless data stream of XML messages (and "heartbeats"), that I receive via a telnet connection and through a site-to-site VPN IPsec tunnel. I'm still pondering. What is the best/most ...
8
votes
3answers
245 views

Is a single object to be preferred over multiple variables?

It was quite hard to put what I meant into a title, but it's easy to put into code. C++ Is this int offset_x = 10; int offset_y = 40; ... element.move(offset_x, offset_y); To be preferred over ...
3
votes
2answers
157 views

What's a good format for documenting hundreds of data feeds?

Several governments are starting to publish open data: datasets generated by the goverment, made freely available for citizens to use for value-added app development, analysis, and feedback. For ...
7
votes
2answers
633 views

Why build data models in a dynamic language?

Background This question stems out of an architectural discussion we had at work. For the current project we are using Python and an object oriented database. There are input services that we ...
4
votes
2answers
337 views

Design strategies for storing and validating serial numbers

We are writing software to track Foo Widgets. Each Foo Widget has a serial number. The serial number is an 32-character alphanumeric string. The string is separated into five sets. Each set is ...
1
vote
1answer
209 views

Storing 'sensitive' data in settings file

I'm writing a small utility in AutoIt that connects to Twitter. I would like to store the username and password in the programs setting file, but I know that it needs to be encrypted obviously. ...
1
vote
1answer
54 views

Multiple Display of a Document and persist each viewer change in a single document

i have a scenario where i have to make available a document for viewing and editing to multiple users, the users can edit and view the document at the same time. Now the problem arises here if for ...
1
vote
0answers
196 views

How to organize integration tests and test data for different environments when using Maven Failsafe

I have started to separate my unit tests from my integration tests by using Maven Surefire and Failsafe. Now I'm wondering what good ways there are to deal with separate environments. Take for ...
6
votes
1answer
687 views

Terminology: Really Delete vs set IsDeleted (“soft delete”) flag

I have a site where a regular user can delete records, where what happens is that an IsDeleted flag gets set. On administrative pages, a privileged user can delete records where an actual SQL DELETE ...
1
vote
0answers
123 views

What will be the better way for data retrieval on application that needs to handle limited amount of data? [duplicate]

Just moved this question from Stack Overflow. Since, adding my code snippets itself would make this question really long. Instead, I am pretty interested in knowing a better ways for data retrieval on ...
2
votes
1answer
558 views

How best to merge/sort/page through tons of JSON arrays?

Here's the scenario: Say you have millions of JSON documents stored as text files. Each JSON document is an array of "activity" objects, each of which contain a "created_datetime" attribute. What is ...
1
vote
2answers
204 views

Referential integrity in a database where tuples are not physically deleted

Many modern Relational Database Management Systems automatically support referential integrity, i.e. when you try to delete a tuple which has a reference (in the form of foreign key, for example), the ...
2
votes
1answer
303 views

Pattern for mobile app data synchronisation using HTTP over 3G networks

I have a mobile app built using jquerymobile, PhoneGap and some custom CSS and JavaScript. The data objects are received in JSON and used to display different forms to the user. For example { id: 1, ...
2
votes
1answer
359 views

Design patterns to avoiding breaking the SRP while performing heavy data logging

A class that performs both computations and data logging* seems to have at least two responsibilities. Given a system for which the specifications require heavy data logging, what kind of design ...