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Questions tagged [search]

This tag is for questions about search algorithms, tools, and technologies.

0
votes
1answer
57 views

Combinational string search using Java

I wrote a program that receives 2 strings (Input and Search) in the Search string. The sign '+' indicates that if the substring before the '+' exists in the Input string. (The search string cannot ...
3
votes
0answers
45 views

Array Search Algorithm

Recently, I've been experimenting with an array searching algorithm that I'm not sure I've seen anywhere (minor references here). I'm still not fully-learned on how to state the efficiency of what I'...
6
votes
2answers
646 views

Find a best fuzzy match for a string

I am trying to find a best match for a name within a list of names. I came up with the below code, which works, but I feel that the creation of the intermediate ...
2
votes
0answers
53 views

String search function in typescript/angular

I'm trying to return a list of objects called orders based on a string search that the user enters. orders has a ...
3
votes
2answers
50 views

Listing the playlists on which each song appears

I created a way to export my Google Play playlists to a text file and also a way to export all of my songs in Google Play to a text file. Now I have both the song list (in an array format) and ...
1
vote
2answers
87 views

Calculating the minimum and maximum of a byte array [closed]

I've been working with binary files with this last assignment and part of it was to determine the maximum and minimum byte. Initially this was 2 functions but a bonus portion was to make them into 1 ...
2
votes
1answer
58 views

Locate substrings within a file

Here, I am reading in a newline delimited file that can be millions of repeating lines that looks like this: ...
1
vote
1answer
75 views

PHP code for search page

Want to show you part of code that I wrote to process search request. User commit search by articles (codes) of products. The goal is to allow user write his search request to textarea element in any ...
4
votes
0answers
46 views

Improved Knuth-Morris-Pratt over a source of indeterminate length

Following the successful review of my previous implementation. Please review my new, generic implementation of the Knuth-Morris-Pratt algorithm. Its modified to search a source of indeterminate ...
4
votes
2answers
97 views

Knuth-Morris-Pratt over a source of indeterminate length

Please review my generic implementation of the Knuth-Morris-Pratt algorithm. Its modified to search a source of indeterminate length in a memory efficient fashion. ...
3
votes
2answers
103 views

Go grep command clone

I am trying to make a simple clone of the command line utility grep. I'm working on it just for fun and to practice Go. The thing is, I am trying to make it in a way that if several files are given at ...
1
vote
1answer
70 views

Scheme: FSM substring search

I have been working on a function that return a FSM that searches a specific word based on the argument of the constructor. The idea was to use those routines as means to learn about regular ...
3
votes
1answer
48 views

Search indexing of Battle Mech Loadouts

Background I am since a long time ago developing a JavaFX application for creating and analysing 'Mech loadouts for Mechwarrior Online. I previously had a very crude search function based on a ...
0
votes
1answer
120 views

Generic Binary Search Tree Implementation in Java

There is an implementation of Binary Search Tree. This is kind of based on Set Theory that duplicates are not allowed but an attempt to adding the same node twice will replace the older node. BSTNode ...
-1
votes
1answer
185 views

Rabin-Karp String matching

I am learning algorithms and have implemented the Rabin-Karp string search algorithm. I didn't implement a rolling HashCode, but it's judged correct by this ...
3
votes
1answer
185 views

Search for rows in a 2D array that contain a given sequence

I have a 2d array of m * n dimension (m and n can vary from 1 to 100000). The following snippet of code checks if the sequence exists in the row and stores the index if it exists. The time taken by ...
2
votes
1answer
263 views

String search algorithm for finding if a long list of long strings string exists in a similarly sized haystack

My use case is that I have a list of emails and I need to find if the email is in the chain: ...
1
vote
2answers
1k views

Finding specific small byte arrays in large binary files

I'm trying to quickly and efficiently find every recurring position of small byte arrays (4 bytes) in large binary files (several GBs). My current method is as follows: ...
2
votes
2answers
82 views

Check if specific pattern exists in another array and save the index

Let's say I have this pattern and a large array: ...
1
vote
0answers
163 views

React widget to display, sort and search remote data

I've created a React widget that pulls data on crypto-token pairs from a remote API and makes that data sortable by headers and searchable. You can view a demo of it here. Is this a maintainable way ...
6
votes
1answer
92 views

Personal School Course Scheduler

A good friend of mine had the challenge of trying to build a schedule using all available times and classes through a spreadsheet... by hand. He asked me if I could build a program to generate valid ...
3
votes
1answer
60 views

A-Star Search with 3D Universe

I am attempting to write up a program in Python that will find the shortest path between two nodes in 3D space. The actual domain is the EVE-Online Universe, which is composed of systems connected by ...
2
votes
3answers
683 views

Insertion of a node in M-way search tree

I am currently studying data structures and i am looking to see if my implementation of the insertion method in an M-way search tree is good and i am looking forward to improving my coding approach. ...
6
votes
2answers
351 views

Find the second largest number in an array with at most n + log2 n - 2 comparisons

This exercise is from Roughgarden's (excellent) course on algorithms on Coursera: You are given as input an unsorted array of n distinct numbers, where n is a power of 2. Give an algorithm that ...
3
votes
1answer
65 views

Finding an index in an array of objects with 3 possible outcomes

currentUserPosts will have a post object with an id that either matches a tempId, an ...
2
votes
0answers
404 views

C++ implementation of Monte Carlo Tree Search with Python wrapper

Important Prebuilt Python Extensions built for Python 3.6 Includes Python f-strings (3.6+) Complementary GitHub link https://github.com/thejhonnyguy/CPyMCTS Notable: Previous attempt with stock ...
-5
votes
2answers
576 views

Searching with multiple filters [closed]

I was looking for optimizing a search method for an assignment where I had to search a file for employees, I should be able to search by having any of the four filters or even none; I've imagined it ...
6
votes
2answers
1k views

DFS in a binary tree

Problem statement: Perform a depth first traversal on a BST and print the elements traversed. ...
2
votes
4answers
8k views

Searching for a specific object in an ArrayList [closed]

Is this an efficient way to search for a specific object in an ArrayList? Product is the superclasS. Mobo, CPU, RAM, GPU... are the subclasses. ArrayList(called stock) stores Product objects. I ...
3
votes
1answer
289 views

Knuth–Morris–Pratt string search algorithm

I finally think I've implemented the Knuth–Morris–Pratt string search algorithm correctly, now time for that lovely criticism that causes me to learn! The code doesn't look all that pretty however it ...
4
votes
1answer
153 views

Filling a string at minimal cost

I'm solving the following problem. Here is the problem statement: You are given a string with wildcards, e.g. X***Y*Z. Your goal is to print an input string ...
12
votes
5answers
825 views

Find all words that satisfy unknown letters (Hangman)

I have been working on a function which might be used to solve a word game like Hangman or "Wheel of Fortune". Basically, I wish to search from a very large ...
1
vote
1answer
642 views

Searching for column-indices of a multi-dimensional array that match multiple conditions (one condition per row)

I have written a script that I believe works and covers all edge-cases. I am curious about ways to improve upon speed. While the given example below covers a multi-dimensional array of ...
4
votes
1answer
365 views

Nearest Neighbor Algorithm (general nearest, forward-nearest, or backward-nearest)

I am trying to write an algorithm that can find user-specified nearest neighbors. By user-specified, I mean that the user can specify whether it's a general nearest neighbor, a forward-nearest ...
3
votes
2answers
339 views

C# A* Pathfinding implementation, focusing on reusability and efficiency

I wrote a C# A* pathfinding (Though, it's generic enough that it could be used for other search purposes) implementation. I started this when I found that existing implementations often didn't support ...
0
votes
3answers
69 views

Equals and Contains for text search

I am trying to implement a search routine for an application written in C#. The requirements are as follows: The user can select one of the following options for search: ...
2
votes
3answers
73 views

search for text across multiple tables

I've got the following query. ...
1
vote
2answers
97 views

Search a unique list and search a larger list to set dictionary with keys of binary values

I would like to search a list of unique values and create a dictionary with those unique values as keys, and a binary list for whether those values occur. I have successfully solved this, but would ...
0
votes
2answers
52 views

SQL Server Multi Term Wildcard Search on Multiple Fields with Ranking

I've built up this search query for searching airport locations on multiple fields, but I don't particularly like the way it works in practice. Even though it is fairly cool. I'll be reverting back to ...
3
votes
1answer
1k views

Filtering parent and children elements of list of dictionaries

I have a list of dictionaries and its elements has id and parent_id fields. Main purposes: If the parent_id field of an element is defined, it should be returning the rest of elements except itself. ...
2
votes
1answer
84 views

Which is the best approach for searching the dictionary items?

We can search for the list of dictionaries using the below some approaches, Can one please help me, which one is the memory efficient approach to use? Provided that: ...
3
votes
3answers
156 views

Case insensitive sub-string search

I found myself in a need of a function that checks whether a string is a sub-string of another string, in a case-insensitive manner. I found that there's no standard function to do this, so I wrote my ...
4
votes
1answer
136 views

QuickSearch for files and directories

I have a project where I need to search for directories and files. In fact I'm searching for paths in other projects. I don't want to just find files but I also want to exclude some directories or ...
2
votes
1answer
220 views

Searching for an object with spectific property, using user input

I have just started my adventure with C#. Below you can find a code written for my school assigment. The homework task had 3 major elements: building a class book creating a metod for changing the ...
3
votes
0answers
166 views

Search GitHub users when text field changes in Kotlin Android app

Problem: Search for users by their name using the GitHub API (sorted by the number of followers) and display the results in a RecyclerView. Implementation: Hitting the GitHub API every time when user ...
2
votes
2answers
90 views

A linear search implementation for any data type in C

I performed an "experiment" to test my understanding of pointers in C. I decided to write a linear search function that can work on any array provided there is an existing function to compare the ...
20
votes
2answers
3k views

Search a big (13 GB) Outlook PST file

I have an Outlook PST file of a pretty big size (13 GB). For some indexing purpose I needed to scan through the full PST file to get all the PR_SEARCH_KEY and then ...
7
votes
1answer
2k views

Approximate string search in Python

I have a long text (about 6,000,000 chars) and a short text (about 6,000 chars). The long text contains the short text, but not exactly - a small number of words are missing, abbreviated or just ...
3
votes
2answers
172 views

Variadic function to find the first matching (string) argument in a larger array

Playing around with parsing a data buffer I wrote a small search function to find the first complete match out of a set of (string) arguments. The (simplified) buffer class with the find function: <...
3
votes
2answers
307 views

Is given pattern a subString of given input string? KMP implementation

My implementation of Knuth Morris Pratt algorithm. Looking forward for code review comments. Let me know of there is a better way to implement this algorithm. ...