?
Solved

Searching for a substring in a Map

Posted on 2003-11-10
5
Medium Priority
?
206 Views
Last Modified: 2010-03-31
I have a list of 3000 items.
Each item has key and value.

I need to find all the occurrence in the list whose value matches a substring.

Example:
My input is "home" and my list is:

Key              Value
001              home gardening
002              stay at home
003              office supplies
004              working from home - guide
005              the homeland office

The output should return the following items:
001, 002, 004 and 005.

I can use a vector and using a loop, perform a string.indexOf validation for each item in the list. Is there a more efficient way of doing this.
0
Comment
Question by:bennies
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
5 Comments
 
LVL 86

Expert Comment

by:CEHJ
ID: 9714551
>>Is there a more efficient way of doing this.

No - in a word.
0
 
LVL 86

Accepted Solution

by:
CEHJ earned 200 total points
ID: 9714586
...unless of course you can mark the items in some way on insertion, and then maintain a separate index.
0
 
LVL 15

Expert Comment

by:jimmack
ID: 9715772
I'd go along with CEHJs comments here.

There are always *different* ways of doing things, but that all depends on what you mean by efficiency.  Remember, efficiency is always a trade-off between space and speed.

The way you're doing it at the moment is probably about the best you could do in terms of space, implementing a separate index might make the code faster, but increases the space it takes.

It all depends on which (space or speed) you want to sacrifice ;-)

(Note.  Sometimes it is possible to create a solution that is more efficient in both space and speed.  This usually leads to unreadable/unmaintainable code ;-))
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Ready to improve network connectivity? Watch this webinar to learn how SD-WANs and a one-click instant connect tool can boost provisions, deployment, and management of your cloud connection.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
In this post we will learn how to make Android Gesture Tutorial and give different functionality whenever a user Touch or Scroll android screen.
This tutorial covers a step-by-step guide to install VisualVM launcher in eclipse.
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …
Suggested Courses
Course of the Month10 days, 10 hours left to enroll

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question