Solved

Array comparison algorithm of different sized arrays

Posted on 2006-11-10
2
904 Views
Last Modified: 2008-01-09
Hello all,

I seem to have a brain freeze going and I sure could use some help before I do something drastic (you know I never really liked that guy in the next cubicle)!

Assume I have 2 arrays.  Array 1 is a list of possible string values:

final String colors[] = {"black", "brown", "red", "orange", "yellow",
                            "green", "blue", "violet","grey", "white"};

Array 2 is a list of 3 colors chosen by a user:

final String userColors[] = {"red", "yellow", "white"};

How can I compare the two arrays to make sure that userColors[] only has values that can be found in colors[]?

Thanks,
Brian
0
Comment
Question by:bnblazer
[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 Comments
 
LVL 16

Expert Comment

by:imladris
ID: 17917975
In pseudo code it would be something like:

set usercolorsvalid to true
for all user colors
     set incolor to false
     for all colors
          if current user color equals current color
               set incolor to true
               break
     if not incolor set usercolorsvalid to false

at the end usercolorsvalid will indicate whether all user colors are in the colors array or not. Basically, you go through them one by one, and check if there is an entry for them in the colors array
0
 
LVL 9

Accepted Solution

by:
owenli27 earned 250 total points
ID: 17917996

if ((Arrays.asList(colors)).containsAll(Arrays.asList(userColors) ))
{
....
}
0

Featured Post

Revamp Your Training Process

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
iterator/ListIterator approach 17 66
Eclipse Java import and method not resolved 4 125
wild fly 8 startup error 2 77
Delete .class files at every compile 4 55
An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…
This tutorial covers a practical example of lazy loading technique and early loading technique in a Singleton Design Pattern.
Suggested Courses

739 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