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Thread: Identify maximum distance element from String array

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    Default Identify maximum distance element from String array

    I have a requirement where I have to find an element from an array that has maximum distance in occurrence.

    If there are two terms that were equally searched, the return term has the longest distance between when it was first and last searched.
    Given the following array
    [‘C++’, ‘Java’, ‘C#’, ‘C#’, ‘Java’, ‘Python’, ‘C#’, ‘Java’]
    Our Program should return “Most searched term is Java”

    Note: Both ‘Java’ and ‘C#’ were searched 3 times, but the program should return ‘Java’ as distance
    between its first and last search is greater than that of ‘C#’.

    I tried searching google, I can find the distance (6) but couldn't return the value (Java).

  2. #2
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    Default Re: Identify maximum distance element from String array

    element from an array that has maximum distance in occurrence.
    Can you post an algorithm for searching an array to solve it?
    Once you post an algorithm, we can help you write the java code to implement the algorithm.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Identify maximum distance element from String array

    With this code, I can find the difference in index position but couldn't catch the value.


    public class mstry {

    public static void main (String[] args){
    String[] a ={"C++", "Java", "C#", "C#", "Java", "Python", "C#", "Java"};

    int maxDist = 0;
    for(int i=0; i<a.length; i++)
    {
    int firstOcc = -1;
    int lastOcc = -1;

    for(int j=0; j<a.length; j++)
    {
    if(a[i] == a[j])
    {
    if(firstOcc == -1)
    firstOcc = lastOcc = j;
    else
    lastOcc = j;
    }
    }
    if(lastOcc - firstOcc > maxDist)
    maxDist = lastOcc - firstOcc;
    }
    System.out.println(maxDist);
    }
    }

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    Default Re: Identify maximum distance element from String array

    couldn't catch the value.
    Can you describe the steps you take to find the value when you do it manually?

    Please edit your post and wrap your code with code tags:

    [code]
    **YOUR CODE GOES HERE**
    [/code]

    to get highlighting and preserve formatting.
    http://www.java-forums.org/misc.php?do=bbcode#code
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Identify maximum distance element from String array

    Array = [‘C++’, ‘Java’, ‘C#’, ‘C#’, ‘Java’, ‘Python’, ‘C#’, ‘Java’]

    Steps:

    1. Find the maximum occurrence of the element; in this case, we have 2 elements Java and C# they have maximum occurrence 3
    2. Then, find 1st and last occurrence of the elements (Java and C#) position
    3. Now subtract the first occurrence index from the last occurrence index for Java, same for C#
    4. Print the max difference which is 6 for Java.

    Here, I want to print Java.

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    Default Re: Identify maximum distance element from String array

    Some questions about holes I see in the above"
    Where are the elements (Java and C#) saved for using in step 2?
    How does step 1 know what to save?
    How are the distances for each saved element saved so they can be used for step 4?
    If you don't understand my answer, don't ignore it, ask a question.

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