Increment counter with loop

Question

This question is related to my previous question    Jsp iterate trough object list  I want to insert counter that starts from 0 in my for loop  I ve tried several combinations so far    1    lt c forEach var  tableEntity  items    requestScope tables   gt      lt c forEach var  rowEntity  items    tableEntity rows   varStatus  count  gt                       lt c out value    count     gt       lt  c forEach gt   lt  c forEach gt    2    lt c set var  count  value  0  scope  page    gt   lt c forEach var  tableEntity  items    requestScope tables   gt      lt c forEach var  rowEntity  items    tableEntity rows   gt            lt   count    gt     lt c out value    count     gt       lt  c forEach gt   lt  c forEach gt    Problem with first approach is that outer loop has 3 items and inner loop has 7 items  so for each outer item the count starts from 0  The second one I get compile error  Here is basically what I want    counter   0  outer for loop      inner for loop         counter             cout echo print counter value should start from 0     end inner loop end outer loop   I m just not totally familiar with the syntax  thank you

User · Answer

You can use varStatus in your c forEach loop   In your first example you can get the counter to work properly as follows      lt c forEach var  tableEntity  items    requestScope tables   gt      lt c forEach var  rowEntity  items    tableEntity rows   varStatus  count  gt                      my count is   count count       lt  c forEach gt   lt  c forEach gt

User · Answer

what led me to this page is that I set within a page then the inside of an included page I did the increment   and here is the problem   so to solve such a problem  simply use scope  request  when you declare  the variable or the increment     when you set the variale add scope  request   lt c set var  nFilters  value    0   scope  request   gt    the increment  it can be happened inside an included page  lt c set var  nFilters  value    nFilters   1    scope  request    gt    hope this saves your time

User · Answer

The varStatus references to LoopTagStatus which has a getIndex   method   So    lt c forEach var  tableEntity  items    requestScope tables   varStatus  outer  gt      lt c forEach var  rowEntity  items    tableEntity rows   varStatus  inner  gt                       lt c out value     outer index   fn length tableEntity rows     inner index     gt       lt  c forEach gt   lt  c forEach gt    See also    Hidden features of JSP Servlet

User · Answer

Try the following    lt c set var  count  value  0  scope  page    gt     in your loops  lt c set var  count  value    count   1   scope  page   gt

[java] Increment counter with loop

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