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Great Reads

Building a search engine with Python, Tornado and Strus

by Patrick P. Frey

This tutorial based on a docker image will guide through the development of a search engine service based on Strus and its Python Bindings within the Tornado web-framework.

Searching Music Incipits in Metric Space with Locality-Sensitive Hashing

by Ajcek84

Using locality-sensitive hashing algorithm to improve performance of searching of musical incipits

Distributing a search engine index with Strus

by Patrick P. Frey

Article about implications of scalability requirements on full-text search engines and how Strus meets these requirements.

Multiobjective Tabu Search for Clustering and the Zoning Problem

by Arnaldo P. Castaño

This document describes a tabu Search algorithm embedded in a multiobjective framework capable of finding solutions to the zoning problem by allowing the optimization of multiple objectives.

Latest Articles

Search MySQL Like Google Using Match and Full-Text Search

by Arctype SQL

How to use full text search and the match keyword to find a string in every table in a MySQL database

Find Duplicate Text

by Dharmesh Barochia

Recommended best practices for finding and removing Duplicate Text/Documents

hOOt - full text search engine

by Mehdi Gholam

Smallest full text search engine (lucene replacement) built from scratch using inverted MGRB bitmap index, highly compact storage, operating in database and document modes

Searching Music Incipits in Metric Space with Locality-Sensitive Hashing

by Ajcek84

Using locality-sensitive hashing algorithm to improve performance of searching of musical incipits

All Articles

top

Search

Crawled websites not inserting into my SQL table | PHP web crawler

8 Dec 2023 by Dave Rave

Instead of developing everything from scratch why don't you use existing parser like Simple HTML DOM documentation[^] ? This one works very well and will save you hours of development. The rest is easy - the queue of links to process etc. I'd...

MySQL

PHP

Semantic search on numeric data

26 Nov 2023 by Maciej Los

I think you don't understand what semantic analysis[^] are. I'd suggest to start with Stanford's Univerity publication: Learning Word Vectors for Sentiment Analysis[^]. Then, use its Large Movie Review Dataset[^] to create your own model. In...

machine-learning

NLP

Semantic search on numeric data

24 Nov 2023 by Apoorva666

I have a dataset in csv format. Most columns have numbers in them. The data is mostly number based, with little text. A sample of my dataset: Test_name Execution_date User_name Total_tests Passed_tests Failed_tests test1, ...

machine-learning

NLP

Crawled websites not inserting into my SQL table | PHP web crawler

24 Nov 2023 by s.s.scriptties

I've made a PHP web crawler and then made a MySQL table called "dex" as in index, then I connected to the database through PDO and tweaked the code to "INSERT" websites that aren't already crawled into the table, "UPDATE" for websites that are...

MySQL

PHP

Tools to build a semantic search engine

19 Sep 2023 by Apoorva666

I'm trying to build a semantic search engine for my production application. I tried building one from scratch. I did the tokenization, vectorization,... & other steps myself, but the whole process was consuming a lot of time. So I decided to use...

Python

AWS

fuzzy

Tools to build a semantic search engine

19 Sep 2023 by Dave Kreskowiak

The problem isn't with Kendra. It's with your understanding of how it works and your expectations. There's plenty of areas that can cause your searches to fail to return expected results. This can be how you're indexing your documents, which...

Python

AWS

fuzzy

Tools to build a semantic search engine

19 Sep 2023 by Richard MacCutchan

The documentation at Amazon Kendra Features - Amazon Web Services[^] suggests it offers intelligent searching. You need to study it in detail.

Python

AWS

fuzzy

How do I stop receiving e-mails on posts

11 Jun 2023 by mhnCPF

I am receiving way too many e-mails How do I stop this? What I have tried: Searching through the web site over and over again

web

How do I stop receiving e-mails on posts

11 Jun 2023 by Richard MacCutchan

Posting your question in the correct forum might be an idea: Bugs and Suggestions[^].

web

Advanced search control for angular

23 Mar 2023 by Jeffrey Rempel

Does anyone have a suggestion for a alternative control similar to ngx-advanced-search or ngx-magicsearch. These don't seem to be maintained anymore. I'm looking for a control where users can choose which fields they want to search by to provide...

Angular10

Advanced search control for angular

23 Mar 2023 by Ayush Bajpai 2023

Did you find anything? Please suggest me too, would be helpful. Thanks

Angular10

I am trying to sort some chars alphabetically to practice on sorting array

18 Feb 2023 by merano99

Currently, this is C source code. The other programming languages according to the tag are irrelevant. There are several errors: // Str = (char**)calloc(5, sizeof(char)); need space for pointer, use n for size! Str = (char**)calloc(n,...

I am trying to sort some chars alphabetically to practice on sorting array

18 Feb 2023 by Addy__0

#include #include #include char **StringArray(char **arr, int size); int main() { char **Str; int n= 5; int i; Str= (char**)calloc(5,sizeof(char)); Str[0]= (char*) calloc(10, sizeof(char)); ...

I am trying to sort some chars alphabetically to practice on sorting array

17 Feb 2023 by OriginalGriff

Probably because it doesn't compile: you declare StringArray as returning achar** - but the function body does not have a return statement. If code doesn't compile, then it doesn't generate an EXE file - so what you are running is the previous...

I am trying to sort some chars alphabetically to practice on sorting array

17 Feb 2023 by CPallini

Quote: Str= (char**)calloc(5,sizeof(char)); That should beStr= (char**)calloc(5,sizeof(char *)); Might be there are other errors, as well. Anyway the code is not robust against user input.

Usage of regular expressions for search and replacs

17 Feb 2023 by Versy Stems

I don't know how to perform a certain type of search and replace. What I have tried: To adapt an old source code within eclipse it will be very convenient to do a search and replace keeping one character of the original text and replacing it...

regular-expression

Usage of regular expressions for search and replacs

17 Feb 2023 by OriginalGriff

Try:([a-zA-Z]+)(?\d+)(...

regular-expression

How do I trace back the shortest path found using BFS

23 Oct 2022 by devonJones

So I've implemented a BFS search algorithm to find the shortest path from the first index in the binary matrix (top left) to the last index (bottom right). I would now like to trace back the path that I found, but I have no idea how to keep...

.NET

algorithm

How to search items on listbox with a text filter in C#?

22 Oct 2022 by ernteSKY

The following code working well with basics but I would like to update with speacial request. My_listBox.SelectedItems.Clear(); for (int i = My_listBox.Items.Count - 1; i >= 0; i--) { ...

Visual-Studio

ListBox

Whats the code for this question?

13 Oct 2022 by Dan Jj

Write a program to solve the 8-queen problem in hill climbing and simulated annealing algorithms. For hill climbing, you must write an algorithm for each of the three different variants: steepest-ascent, first-choice, and random restart. Use a...

Python

Java

Whats the code for this question?

13 Oct 2022 by OriginalGriff

While we are more than willing to help those that are stuck, that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for...

Python

Java

How to create a search bar in uwp

3 Oct 2022 by Venki Vky

I NEED TO CREATE A SEARCH BAR IN MY UWP APP ...

Windows-Phone-8.1

XAML

UWP

How do I connect a powerapps table as a source in jquery autocomplete?

22 Jul 2022 by n.ll

I am using power portal to create a form. I am using a basic form and adding JQuery to it. I have an 'deactivate item number' field that needs to show suggested options as the user types. The table has two columns: item number (a number) and...

Search results in SQL server using loop in where clause

3 Jul 2022 by Hamza M. S. Abazeed

Good afternoon, I'm trying to complete a small project using SQL Server, but I'm having some troubles ;/ I'm trying to Serch in SQL Server table, where I have a statement (one word or many words) I have a table two tables: - Products (P_ID...

Search results in SQL server using loop in where clause

3 Jul 2022 by Dave Kreskowiak

You cannot use a LOOP expression in a WHERE clause. The WHERE clause expects to see only conditional expressions. You can build the SQL statement in a variable, use the LOOP clause to build up a WHERE clause with multiple OR expressions, then...

Average of super elements

22 Apr 2022 by lalli307

Given an array, find the average of values in the array that satisfies the below condition. condition is, element value and the number of times that element is present in the array must be the same. Note:1) if no element is satisfying the...

Average of super elements

22 Apr 2022 by CPallini

Your approach would work only if you keep track of already visited numbers, e.g. #include #define MAX_N 100 int main() { int n, arr[MAX_N]; int skip[MAX_N]; // this is used for skipping already visited numbers int sum = 0; int...

Average of super elements

21 Apr 2022 by OriginalGriff

A better approach would be simple: sort the array - C includes the C library function - qsort()[^] which will help you with that. Once sorted, all identical values are side by side - so counting identical values becomes trivial - a single pass...

How do I search data in a gridview (data isn't from database) ASP.NET

5 Feb 2022 by Graeme_Grant

You are looking at it backwards. The GridView, as the name implies, is a view into the data. So you filter/search the data and display the results in the GridView. UPDATE I did a quick Google Search and found this: Search records in GridView...

How do I search data in a gridview (data isn't from database) ASP.NET

5 Feb 2022 by Tinsae Teku

Most search features of grid view in ASP.NET shows how to search data from a data list that is connected to a database. But my data in my gridview is list of name of books from a folder. It uploads files from folders and save them on visual...

Swift - creating a data model and an array

11 Jan 2022 by Member 15127345

I'm just starting out my journey in Swift and I have a task to do that I need help with. First, I have to create a data model and an array: Quote: City model object should contain: id, name, description, latitude, longitude, list of keyword/tag...

Swift

Datamodel

Swift - creating a data model and an array

11 Jan 2022 by Richard MacCutchan

I am not a Swift programmer. However, after reading https://docs.swift.org/swift-book/LanguageGuide/ClassesAndStructures.html[^] I would make the following suggestion. The task is to create an array of City objects, not strings of city names. So...

Swift

Datamodel

How to write (log2(log2n)) in java

27 Oct 2021 by Abdullatif Art

am trying to find the average number of comparisons in linear, binary, and Interpolation search and I found that by using this (log2(log2N)) we can find the average number of comparisons in interpolation but I could not represent this...

Java

How to write (log2(log2n)) in java

27 Oct 2021 by phil.o

If log2(N) = log(N) / log(2) , then log2(log2(N)) = log2(log(N) / log(2)) = log(log(N) / log(2)) / log(2)

Java

C# implementing a search algorithm

24 Aug 2021 by Luc Pattyn

Three comments: (1) A crucial part of the code isn't shown: when you enter a post. you fill array newpost[] and then call Bloggen.Add(newpost); which is a black box to us. When you search a post. you basically scan a post[] array, so we must...

algorithm

C# implementing a search algorithm

24 Aug 2021 by tgviee

I'm currently needing help to implement a search function within my (first ever) program, primarily a Linear Search-algorithm and potentially a Binary-algorithm as well. I've been reading through a ton of guides and tried different sorts of codes...

algorithm

C# implementing a search algorithm

24 Aug 2021 by OriginalGriff

Getting it to run not mean your code is right! :laugh: Think of the development process as writing an email: compiling successfully means that you wrote the email in the right language - English, rather than German for example - not that the...

algorithm

Read the data into a binary search tree (BST).

3 Aug 2021 by navjot kaur 2021

Read the data into a Binary Search Tree (BST) What I have tried: i. Read the data into a Binary Search Tree (BST)

binary

TreeListView

algorithm

Read the data into a binary search tree (BST).

2 Aug 2021 by OriginalGriff

binary

TreeListView

algorithm

How to write a binary search tree to a text file

22 May 2021 by Casper Josiah

I'm trying to write a binary Search tree to a text file in sorted order, my write method is in my BST class. When I print out the BST in Order Tranversal it works perfectly. When I try to write it to a text file it works but the current node...

Java

binary

file

How to write a binary search tree to a text file

22 May 2021 by OriginalGriff

The first thing to notice is that when you construct a FileWriter instance with just a string parameter, it always overwrites any existing file. So if you want to have more than one node in your file at any time, you either need to use the...

Java

binary

file

Search MySQL Like Google Using Match and Full-Text Search

1 Apr 2021 by Arctype SQL

How to use full text search and the match keyword to find a string in every table in a MySQL database

Why my SCOPUS API search results does not matches with elsevier search engine results using Python?

14 Dec 2020 by OriginalGriff

Talk to the API providers: they will know a lot more about their code than we will, and should be able to help you a lot quicker and more thoroughly.

Python

automation

web

Search two columns in mysql C#

4 Oct 2020 by Johnny Sins

i have a search text box. Now if i search -------------- | Californa 87| --------------- The Location and Location Number. There will be no output in my datagrid view. int i = 0; dgv_bene.Rows.Clear(); ...

MySQL

DataGridView

Search two columns in mysql C#

4 Oct 2020 by OriginalGriff

For starters, don't do it like that! Never concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Always use Parameterized queries instead. ...

MySQL

DataGridView

Javascript read a text file from a string

11 Apr 2020 by Blazin 3330

So I am trying to learn javascript, but I cannot find a tutorial that will allow me to search a text file using a string. I am wanting to search a text file at: constant path = "./data/data.txt" And I want to search for `${server.id} prefix: ` I would then want to store the full line (as...

Javascript read a text file from a string

9 Feb 2020 by F-ES Sitecore

You can't read files using javascript. If you google how to use the html5 file api you'll find lots of examples of accessing files via the "file" input component, but that requires the user to explicitly select the file to be searched through. ...

Dirac delta search function

27 Jan 2020 by Patrice T

This is not a programming problem, it is about a mathematical algorithm. Quote: I have an N-dimensional distribution that resembles the Dirac Delta Function (there is a single narrow peak in an otherwise uniform distribution). My sampling cost is very high, so I want to minimize the number of...

algorithm

Dirac delta search function

27 Jan 2020 by Member 14727212

I have an N-dimensional distribution that resembles the Dirac Delta Function (there is a single narrow peak in an otherwise uniform distribution). My sampling cost is very high, so I want to minimize the number of samples required to locate the peak. A grid search would be sufficiently...

algorithm

Dirac delta search function

27 Jan 2020 by Member 14727212

What I think I'm going to try a sampling method similar to that used in finite element analysis. FEA uses a grid sampling method and starts by zeroing out everything but the diagonal. With each iteration, the diagonal is widened by one row. I think that this is going to minimize the number of...

algorithm

Dirac delta search function

27 Jan 2020 by CPallini

I see no way other than random sampling. There is no smart way to locate a point on a straigh tline.

algorithm

Search in datatable with datetime in C#

16 Jun 2019 by Maciej Los

Take a look at your code: DateTime d1 = new DateTime(2019,05,26,21,43,24); DateTime d2 = new DateTime(2019, 05, 26, 5, 32, 42); d1 is bigger than d2, so... this condition: ShiftStartDateTime>=d1 AND ShiftStartDateTime

Search in datatable with datetime in C#

16 Jun 2019 by Member 14089908

Hello, I have a little problem, i want get all records in datatable between two dates and time. Please look at the code bellow. I want to get all the records between "25/5/2019 21:43:24 PM" AND "25/5/2019 05:32:42 AM". What can i do please advise. Thanks in advance. What I have tried: ...

How to search multiple terms in Google?

14 Jun 2019 by Gabriel9999

I have a project related with Google Dork. I need to search multiple things in a single search with the terms like search txt files in given domain only. What I have tried: I have a project related with Google Dork. I need to search multiple things in a single search with the terms like search...

Google

google-analytics

How to search multiple terms in Google?

14 Jun 2019 by Patrice T

Quote: How to search multiple terms in Google? Have a look here: Google Advanced Search[^]

Google

google-analytics

How can I send private msg plz to someone here

22 May 2019 by nezar78

how can I send private msg plz to someone here What I have tried: how can I send private msg plz to someone here

How can I send private msg plz to someone here

22 May 2019 by Thomas Daniels

If they left a message in a forum, you can use the 'Email' link next to 'Reply' to send something privately. But if they disabled the 'Email' link or do not have a forum message at all, then you can't.

Find Duplicate Text

23 Apr 2019 by Dharmesh Barochia

Recommended best practices for finding and removing Duplicate Text/Documents

Python

AWS

Azure

How to search multiple terms in Google?

8 Apr 2019 by #realJSOP

google dork multiple search terms - Google Search[^]

Google

google-analytics

How can I implement a button to search results in listbox

30 Mar 2019 by Member 14017552

C#, Windows Forms - I did almost 90% of the problem but Search Button is not working! Given Access file with the data (below). I need to build a program (GUI application) that uses LINQ to get data from the database file called (students.accdb). I need radio buttons to select and search by last...

ListBox

How can I implement a button to search results in listbox

30 Mar 2019 by OriginalGriff

Instead of searching, use filtering of your original data. It's easy enough to do: private BindingSource displaySource = new BindingSource(); private void frmMain_Shown(object sender, EventArgs e) { DataTable dt = new DataTable(); using...

ListBox

hOOt - full text search engine

24 Feb 2019 by Mehdi Gholam

Smallest full text search engine (lucene replacement) built from scratch using inverted MGRB bitmap index, highly compact storage, operating in database and document modes

VS2013

VS2010

I want to make a tool to find search volume of keyword on play store

8 Feb 2019 by NoorKaximi

hi experts, I am trying to find some information regarding building a play store keyword research tool. I googled it but i am unable to find some valuable resource can some tell me from where i can start and what does it require? my preferred languages are c#,php, node.js What I have tried: i...

Node.js

PHP

Getting CORS error as per below in only in Microsoft edge browser while calling azure search api from my custom application

17 Jan 2019 by Richard MacCutchan

You already posted this message at Getting CORS error in MS edge browser while calling azure search from my custom application[^]. Please do not repost.

Azure

Ajax

Microsoft-Edge

I want to make a tool to find search volume of keyword on play store

5 Jan 2019 by DaveAuld

Do a quick search would suggest the only keyword data you can work with relates only to your own apps in the store. Google Play Store Install Keywords Official Data Now on AppTweak! (for everyone) - ASO Blog[^]

Node.js

PHP

I want to make a tool to find search volume of keyword on play store

5 Jan 2019 by Dave Kreskowiak

Unless the Play Store exposes this search data somehow through the Play Store API, you've got no shot at making this work. I have no idea if it does or not, but I don't see a reason why Google would expose it.

Node.js

PHP

C# multiple search textbox (error)

25 Dec 2018 by el_tot93

i get the solution with this code i hope it help anyone private string CreateSqlFilter(string fieldName, Control userInputControl, SqlCommand command, bool exactMatch) { string searchValue = null; if (userInputControl is TextBox) searchValue = ((TextBox)userInputControl).Text; ...

DataGrid

TextBoxBase

DataGridView

C# multiple search textbox (error)

25 Dec 2018 by el_tot93

Dear: friends please if you have time to solve my problem i have many textbox in my form with one button and one datagridview i use this code to make the search DataTable dt = new DataTable(); if (txtCIVILIDD.Text.Length > 0) { ...

DataGrid

TextBoxBase

DataGridView

C# multiple search textbox (error)

24 Dec 2018 by Richard MacCutchan

You need to check all your textboxes first. Collect the text entries and build your search statement by combining the values to match the relevant fields in the database. For example you could do something like: StringBuilder sqlcommand = "SELECT * FROM tabl1 WHERE "; if...

DataGrid

TextBoxBase

DataGridView

C# multiple search textbox (error)

24 Dec 2018 by OriginalGriff

Not like that! Never concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Always use Parameterized queries instead. When you concatenate strings, you cause problems because SQL receives...

DataGrid

TextBoxBase

DataGridView

Passing variable from text control to google custome search engine CSE

12 Dec 2018 by Albert Sbnie

(function() { var cx = 'CXXXXXXXXXXX'; var gcse = document.createElement('script'); gcse.type = 'text/javascript'; gcse.async = true; gcse.src =...

controller

Passing variable from text control to google custome search engine CSE

12 Dec 2018 by Nuha IT

Hi,I have a textBox in the index page and I want it to take the value from this text to the google search engine in another page.how can i pass this variable from control to the cse?This is the index code for passing the variableResponse.Redirect("Search.aspx?parma=" +...

Google

controller

How to search a directory of .txt files for specific string (word or phrase)

11 Dec 2018 by Afzaal Ahmad Zeeshan

Quote: I need to search one directory (c:\K_txt) of almost 3,000 .txt files Searching this on the fly is a really very bad idea, and would have to make your users wait each time they make a change in the query. A good approach would be to read your files once, and create tokens (words, in...

directory

ListBox

string

How to search a directory of .txt files for specific string (word or phrase)

11 Dec 2018 by Member 13698711

hi, I am not good with coding - in vb.net, I need to search one directory (c:\K_txt) of almost 3,000 .txt files for either a word or exact phrase that the user enters, and then load up a listbox with the names of those txt files that contain the word or phrase. Then when the file in the listbox...

directory

ListBox

string

How to search a directory of .txt files for specific string (word or phrase)

11 Dec 2018 by RickZeeland

See answer here: How to search specific string into text file from VB.NET[^] And here: VB.Net 2005: Search specific word in text file within a directory-VBForums[^]

directory

ListBox

string

How to search a directory of .txt files for specific string (word or phrase)

11 Dec 2018 by CHill60

You could adapt the technique used in this CodeProject article File Searcher in C#[^] or this one WinSearchFile: how to search files on your PC[^] Or the techniques discussed here .net - c# Fastest string search in all files - Stack Overflow[^]

directory

ListBox

string

Searching Music Incipits in Metric Space with Locality-Sensitive Hashing

27 Nov 2018 by Ajcek84

Using locality-sensitive hashing algorithm to improve performance of searching of musical incipits

Javascript

SQL

Blazor

How do i Search my record using Vb.net

24 Oct 2018 by Joy1979

Hello Friends!!I have window Form with 'text box' for display and 'command button' to find customer number.Can you please help me how to perform search command in Vb.net?Im using SQL Server 2008r2 as my Database.... i Can now Connect to my Database, and insert some of my records with...

Why searchbox become lagging when typing word to search data in CSV?

15 Oct 2018 by MUHAMMAD HARITH

I developed the store locator using open street map and leaflet. The problem is when I want to type in searchbox it will become lagging to finish the word. That store locator read from the CSV file that has 300++ data. Below is the code for the searchbox: var locationLat = []; var locationLng...

HTML

Javascript

How to extract bold text from pdf file programatically using pdfkit in iOS?

23 Aug 2018 by Akshay K. Bura

I am using PDFKit to display my pdf files. I've integrated the searching functionality but I want to search only bold texts/words. I'm wondering is it possible to do what I'm looking for or does Apple don't allow it? Because String data type is from Foundation class and UIFont is from UIKit. I...

Swift

iOS

PDF

Changing 1 exactly 1 character to optimise a string

8 Jul 2018 by Member 13903102

You are given a string S of lowercase English letters with length N. You are allowed to (but don't have to) choose one index in this string and change the letter at this index to any other lowercase English letter. The cost of this operation is the absolute value of the difference of ASCII...

algorithm

string

Changing 1 exactly 1 character to optimise a string

8 Jul 2018 by Member 13903180

This is a question from on-going challenge, I don't think it is appropriate to ask it while the challenge is going on.

algorithm

string

Changing 1 exactly 1 character to optimise a string

8 Jul 2018 by OriginalGriff

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action. Try it yourself, you may find it is...

algorithm

string

Changing 1 exactly 1 character to optimise a string

8 Jul 2018 by Patrice T

So, you show no attempt to solve the problem yourself, you have no question, you just want us to do your HomeWork. HomeWork problems are simplified versions of the kind of problems you will have to solve in real life, their purpose is learning and practicing. We do not do your HomeWork....

algorithm

string

How to read HTML file and to how to find desired string in C#?

12 Jun 2018 by Eric Lynch

There is some discussion of various methods to parse HTML documents here to get you started: String to HTML Document[^]

HTML

read

string

How to read HTML file and to how to find desired string in C#?

12 Jun 2018 by Member 12268183

Hello, I would like to create an application that could read an html file. Then I would like to search desired strings and get the data to text edit elements using C#. Could you please help with any example or tutorial? Thank you! Regards What I have tried: WebClient client = new...

HTML

read

string

Bing Visual Search for Image Insights

29 May 2018 by Michael Dodaro