Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>As Brian said, Strings in java are immutable. This means that you can't assign through a method call like <code>m2.charAt(j)=' '</code>.This means you have to use another way to keep track of whether you've found the character yet. </p> <p>You could add it to <code>intersection</code> and when checking a character make sure it isn't in <code>intersection</code> by using <code>intersection.indexOf(char c)</code>, if this returns -1 then it isn't in the string. </p> <p>edit:</p> <p>Sorry didn't put into account that the output should be a multiset. The above solves the problem if the output is a set. </p> <p>You could use <code>replaceFirst(String searchFor, String replacement)</code> on your m2 to delete it. it would be something like:</p> <pre><code> for( int i =0; i &lt; m1.length(); i+=2) { if(m2.indexOf(m1.charAt(i)) != -1) { intersection = intersection + m1.charAt(1) + " "; m2 = m2.replaceFirst(new String(m1.charAt(i)), ""); } } </code></pre> <p>So if m1 = '1 1 2 3 5' and m2 = '1 4 2 1',</p> <p>first pass: looks for 1 in '1 4 2 1'</p> <p>second pass: looks for 1 in '4 2 1'</p> <p>third pass: looks for 2 in '4 2'</p> <p>fourth pass: looks for 3 in '4'</p> <p>fifth pass: looks for 5 in '4'</p> <p>returning '1 1 2'</p> <p>Note that that it is incrementing the variable by two to take into account spaces. This is <strong>only</strong> if we assume that the two strings are in the form 'a a a a a a', with 'a' only being a single character. If there are digits or characters that are more than a digit long then you have to skip whitespace and interpret the string in a different way, other than just looking at it at a character-by-character basis.</p> <p>If we can make these assumtions, it would be wise to trim your m1 of trailing and leading whitespace using the String <code>trim</code> method ie <code>m1 = m1.trim()</code> before executing this loop. </p>
    singulars
    1. This table or related slice is empty.
    1. POto find the intersection of two multisets in java
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USRaufio
    1. USRaufio
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COi'm gonna try, thank you very much.
      singulars
      1. PO
      1. USjack sparrow
    2. COBut we want to include repetitions, what happens when we find a character that already appeared but should be considered again?
      singulars
      1. PO
      1. USmadth3
    3. COyeah, actually this is my question. but, im gonna try the followings, i think especially m2=m2.substirng gonna work.
      singulars
      1. PO
      1. USjack sparrow
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload