Answers

• colin Posts: 15,237Questions: 1Answers: 2,599

  October 2018 edited October 2018

  Hi @hitostacha ,

  The Select extensions selects rows based on the row selector - see rows().select(). The best bet would be to either keep another array containing the rows, or just get the data() from the rows when you need it.

  So, something like:

  array = dtHandler.rows('.selected');
  
  // when you need data
  data = array.data().toArray();
  
  // to reselect
  array.select();
  

  Cheers,

  Colin
• hitostacha Posts: 5Questions: 2Answers: 0

  October 2018

  The problem is that I'm looking to re-select given the data in the array, not re-select what was previously selected, for example I'm using .splice() to remove an item from the array, using a method triggered when a certain event happens, and I want it to be reflected in the table
• colin Posts: 15,237Questions: 1Answers: 2,599

  October 2018 edited November 2018

  Hi @hitostacha ,

  Yep, understood. The problem with only storing the data is in the array is that to reselect those remaining, you'll need to scan all the rows and reselect those that match - and you'll need some uniqueness in each row for that to happen. The pseudo code would look something like:

  toSelect = [];
  dtHandler.rows().every(function ( rowIdx, tableLoop, rowLoop) {
    if (this.data() is in array) { // << not pseudo code here
      toSelect.push(rowIdx);
    }
  })
  
  dtHandler.rows(toSelect).select();
  

  Hope that helps,

  Cheers,

  Colin
• hitostacha Posts: 5Questions: 2Answers: 0

  November 2018

  Hi, sorry for the long time I didn't reply to the post, I was away.

  So that is finding the rows alright, but the console says that the method used to select/deselect the rows doesn't exist.
  I'm using

  $('#dataTable tbody').on( 'click', 'tr', function () {
              $(this).toggleClass('selected');
          });
  

  to select the rows
• hitostacha Posts: 5Questions: 2Answers: 0

  November 2018

  OK, doing a little copy-paste from row-selector docs(https://datatables.net/reference/type/row-selector) I managed to get it working as I wanted... But I think it's a bit of overkill since it can be resource,consuming if I select a lot of data, right? Here's the code:

  let toSelect = [];
                  this.dtHandle.rows().every(function ( rowIdx, tableLoop, rowLoop) {
                      let row = this;
                      if (array.some(function(el) {
                                  return el === row.data();
                              })) {
                          toSelect.push(rowIdx);
                      }
                  });
                  this.dtHandle.rows()
                          .nodes()
                          .to$()
                          .removeClass( 'selected' );
                  this.dtHandle.rows(toSelect)
                          .nodes()
                          .to$()
                          .addClass( 'selected' );
  

  Isn't there a more efficient way to do it in the "every" function?