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0
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0answers
24 views

Google-like search solution for an enterprise application stack using Elasticsearch

I know, title is a little confusing but the problem is, too. I am working on a company, it has several different applications and wants these applications have search functionality. We have developed ...
0
votes
1answer
29 views

Efficient way to map changes in a filesystem hierarchy

I'm currently working on a project that will enable file searching based on metadata found in the file. It'll be comprised of 2 parts: a filesystem crawler that passively scans for changes and ...
2
votes
1answer
78 views

Tree search for path finding - algorithm critiques

So, I'm pretty new to AI in general, and am trying to implement a tree-based search from a textfile input (a maze). An example would be: |||||||||||||||||||||| | || | | | \ | |||||| ...
1
vote
1answer
94 views

Why are heuristics a disadvantage for decidable problems?

I'm reading Introduction to Artificial Intelligence by Ertel. This line has me stumped from the textbook (page 102): For decidable problems such as the 8-puzzle this means that the whole search ...
3
votes
2answers
173 views

Any reasons why SQL-92 changed *, ? into %, _?

Do you know any reasons why SQL-92 standard has changed glob pattern wildcard characters from * and ? (SQL-89) to % and _? Currently I need to do mask conversions to allow users searching data with * ...
-2
votes
3answers
115 views

How to manage a large list of distinct numbers

I have a list of around 2 billion distinct numbers stored in memory for some computation. Currently, every time I need to add a new entry I have to search the entire list for a potential duplicate. ...
-1
votes
1answer
66 views

What are some hashmaps we can easily implement? [duplicate]

At many places, I read that we can use HashMap here for O(1) search. Actually, I want to ask how I can implement easy hashmaps which can satisfy this property. Can anyone tell few hashmaps including ...
1
vote
1answer
111 views

A very simple database system with JSON

If we need to store some data in a database, but without the need of advanced SQL features, can we use this scheme (written here in Javascript / node.js) : // the DB will be in RAM ! var myDb = {}; ...
1
vote
3answers
78 views

Generating test data for a search application

I have a general question about testing search applications, and what I'm looking for is pointers to resources on the topic that I can go and research on my own. I've tried semi-informed, ...
3
votes
1answer
59 views

Conveniently sorting and (binary?) searching an array of pairs of numbers?

So I have an array of distinct pairs of positive integers. That is, my array looks something like this (for instance): { (1,5) , (6,4), (5,3), (2,3), (2,4) } And my task is, for a given pair (a,b) ...
2
votes
1answer
150 views

Efficient Code Design for Pattern Search Using a Singleton Pattern

I am having difficulty figuring out an efficient (thread-safe) code design for the following problem. I have been at it for some time now and would really appreciate some advice and input on how best ...
0
votes
0answers
21 views

searching for a user's friends

I have a rails that uses sunspot/solr for searching a number of models in our app. We are now adding a feature for searching for a user's friends. So if I look for "joe" all of my friends named ...
1
vote
1answer
168 views

Performing a Depth First Search iteratively using async/parallel processing?

Here is a method that does a DFS search and returns a list of all items given a top level item id. How could I modify this to take advantage of parallel processing? Currently, the call to get the sub ...
0
votes
0answers
26 views

Relevance of search results

I implemented an easy-to-use text search for our application. It has the usual text fields for all of the keywords any of the keywords none of the keywords Now I would like to prioritize my ...
4
votes
1answer
123 views

How can I test a search engine for an uncommon human language?

We are writing a search engine from scratch in a quite uncommon language, Aramaic, mostly for learning purposes but also because few resources are available in given language. The engine is/will be ...
0
votes
0answers
80 views

Can sequence alignment algorithms be used for search implementation?

Hi I want to implement a search on a website which includes imperfect search results. Meaning, if the search term is misspelled or slightly different from a 100% match, the function should still ...
0
votes
1answer
143 views

Full Text Indexing Strategy for MS Excel Documents

Background As part of a broader application that allows users to search thousands of MS Office documents on a private network, I need to index and make searchable Microsoft Excel files. My basic ...
1
vote
2answers
165 views

Live search/filter as you type in client approach

As an exercise for myself to practice my JavaScript "skills" I'm trying to write a client-side filter. It should be able to filter "content blocks" as the user types. By "content block", I mean a ...
0
votes
0answers
80 views

Search substring using suffix array (and LCP)

I'm searching for a best way to improve suffix array run time using LCP. My text (about 2 500 000 chars) seems like: 0ricco0eric0america0polo0.... My thoughs: SA=suffixArray char=firstChar(input) s ...
4
votes
1answer
350 views

Writing a spell checker similar to “did you mean”

I'm hoping to write a spellchecker for search queries in a web application - not unlike Google's "Did you mean?" The algorithm will be loosely based on this: http://catalog.ldc.upenn.edu/LDC2006T13 ...
0
votes
1answer
127 views

Natural Language to Search Criteria - Date Ranges

Consider an application that stores a set of records that contain: Description Cost Purchase Date I'd like to be able to allow users to utilize natural language to search the dataset. For ...
3
votes
4answers
310 views

fast n-gram access data structure

TL;DR Is there a data structure that'd quickly let me match words at any point (e.g., 'foo' matches 'foobar' and 'zoofoo'), and, ideally, returns a list of "characters that show up after the needle" ...
1
vote
1answer
63 views

Determinining “value” in multi-agent microeconomical simulation

I am trying to determine an objective way for a self-interested agent to calculate the optimal buying/selling price for goods in a multi-agent simulation not dissimilar to Sugarscape ...
0
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0answers
54 views

Search technique - multiple hits, prioritise results

I have developed a search algorithm, which basically matches records on 3 different criteria types. Name, Address, and Keyword(s). "doh" , will find: Name: doh Address: re Keywords: me ...
0
votes
2answers
150 views

Microeconomical simulation: coordination/planning between self-interested trading agents

In a typical perfect-information strategy game like Chess, an agent can calculate its best move by searching the state tree for the best possible move, while assuming that the opponent will also make ...
3
votes
1answer
368 views

modelling a restaurant availability search

I am looking into finding an efficient way which can scale up to thousands of restaurants, for doing a reservation search. Ideally, it would be efficient to answer queries like find a restaurant ...
0
votes
4answers
379 views

Binary Search seems superior, why did the committee of C++ still have Find in the algorithm library?

I wish to search for an integer in a vector of integer. I have two candidates for the job: Binary Search Find It seems that Binary Search is the best candidate for the job as although I have to ...
3
votes
3answers
957 views

storing and retrieving millions of documents using c#

I am working on an integration project, where my “app/web service” will sit in the middle serving documents. Basically, a request is sent with the document id as part of the query string, I check if ...
11
votes
1answer
878 views

How is machine learning incorporated into search engine design?

I am currently building a small in-house search engine based on Apache Lucene. Its purpose is simple - based on some keywords, it will suggest some articles written internally within our company. I am ...
1
vote
1answer
140 views

How to calculate the worst-case runtime of this search-algorithm

I've written a special indexOf function for a list of unsorted unique values. I can search for one or multiple (unsorted) values, passed as array/list, and the function will return me an array/list ...
2
votes
2answers
408 views

How should I make searching a relational database more efficient? [duplicate]

This is in the scope of a web application. I have a database which has a few nested relations. There is a feature which depicts the history of a large chain of relations. It is essentially a data ...
-1
votes
3answers
1k views

Find all lines segments intersections

I have a collection of lines segments, represented by an array. Ex: [3,7,13,6,9] is 4 line segments: [(3,7)(7,13)] , [(7,13)(13,6)] , [(13,6)(6,9)] , ([6,9)(9,3)] I want to find all the lines ...
0
votes
2answers
3k views

Using lucene and sql server togheter. Newbie needs directions [closed]

Basically the whole thing can be explained simply: I need to index one or more SQL Server 2005 databases with lucene so I can search the various records. I found a lot of examples and documentation ...
0
votes
3answers
606 views

A* search for Sudoku

I have a homework problem for an Artificial Intelligence course that I am having trouble answering. Consider solving the Sudoku problem using A* search. The start state has some number of cells ...
1
vote
2answers
468 views

Search algorithm

I would like to create a site where users can post articles with the following optional parts: A title Contents (text) Categories Keywords Articles will be stored in mongodb and the site will be ...
2
votes
3answers
203 views

How to combine search words? AND or OR?

I have a basic search in my webpage. When I designed it, I chose to combine the search box inputs with OR. For example: A search for foo bar will be translated to foo OR bar, so every entry which ...
0
votes
2answers
239 views

How can I conceptually model a craigslist search?

I'm trying to understand how something like this works, but I'm inexperienced and I'm trying to understand how the process would work. Say you have ten categories, a thousand zip codes, and ten ...
2
votes
1answer
325 views

Use a search box that calls on a JSON file? [closed]

I use a JSON file to populate several drop down lists. The format is: { "value" :"lightyear", "name" :"Light Year(yl)" }, { "value" :"astronomicalUnit", ...
1
vote
2answers
1k views

Finding duplicate files? [duplicate]

I am going to be developing a program that detects duplicate files and I was wondering what the best/fastest method would be to do this? I am more interested in what the best hash algorithm would be ...
1
vote
0answers
90 views

How to map the english dictionary to UNSPSC codes?

Is there a db which maps the words from the english dictionary to the UNSPSC codes?(http://www.unspsc.org/) My problem is the following: I am building a search system. And the customer searches for ...
1
vote
2answers
600 views

Implementing search over large data set, PHP or Mysql stored procedure?

I'm building an Online Food Ordering System with PHP and MYSQL, One of the feature of the application is to allow users to search for the restaurants by typing the area name. I would like to know ...
1
vote
3answers
188 views

Binary Search Programming implementation

Binary Search, as we all know requires the elements to be sorted. But we have to take care of unsorted elements too, in the worst case. If the input size is very large, is it a good idea to sort the ...
8
votes
1answer
326 views

heuristic for searching through non-perfectly sorted data

Given sorted data, the search solution is obvious. Given unsorted data, sensible options are sort then search or just linear search. This question is about what to do if the data is somewhat sorted, ...
2
votes
4answers
998 views

Querystring Advanced Search where there are about 20 search fields

I am creating an advanced search page where there are about 20 search fields for a user to filter their search. My question deals with the query string, Is it standard web development practice to have ...
0
votes
2answers
983 views

What is a good algorithm for priority allocation of work duties?

I am currently doing a project (in PHP) that has the following requirements: There is a list of people, sorted in a certain priority. Work should be allocated to them by this priority. e.g. If the ...
2
votes
1answer
109 views

Auto-completion or Suggest

How does Google or amazon implement the auto-suggestion at their search box. I am looking for the most used algorithm with technology stack. PS: I have searched over the net and found this and this ...
5
votes
1answer
229 views

What is “the right way” to do search on a website?

I'm talking the kind of search that auto-suggests your query as you type, the way Google does, the way Wikipedia does, the way Stack Exchange suggests other questions as you type the title, etc. And ...
-1
votes
1answer
318 views

Address search from large text file

Basically I want to develop a Address lookup(part of my project) using C# (and I can use SQL if necessary). I have a very large text file which have all the UK address and postcodes. Addresses needs ...
2
votes
2answers
195 views

doing a full permutation search and replace on a string

I'm writing an app that does something like a custom number (license) plate generator tool where if I ask for the plate "robin" it will suggest I try: r0bin rob1n r0b1n Are there any published ...
8
votes
1answer
1k views

Good technique for search text tokenization

We are looking for a way to tokenize some text in the same or similar way as a search engine would do it. The reason we are doing this is so that we can run some statistical analysis on the tokens. ...