How to remove empty arrays from multidimensional array in JavaScript?

Question

I have a problem with removing empty arrays/objects from a multidimensional array for my search app in google sheets. I am using getLastRow so I thought I will avoid this problem but unfortunately it is not.

My array looks like this:

[[1.39080000912E11, RSSMA004025, ﾎﾞﾀﾝｷｬｯﾌﾟ M4X25, 4.0, 4.2, , , ], [1.39080000912E11, RWJAA058068, FTB-268, 1.0, 486.0, 486.0, , ], [, , , , , , , ], [, , , , , , , ]]

And I am looking for something that will delete empty arrays from the end of the array so it should be like this:

[[1.39080000912E11, RSSMA004025, ﾎﾞﾀﾝｷｬｯﾌﾟ M4X25, 4.0, 4.2, , , ], [1.39080000912E11, RWJAA058068, FTB-268, 1.0, 486.0, 486.0, , ]]

It is just a part of the whole array but I hope you will understand what I am looking for.

My code so far:

function getDataForSearch(){
    
  const ss = SpreadsheetApp.getActiveSpreadsheet();
  const ws = ss.getSheetByName("WP");
  
  var test1 = ws.getRange(4, 6, ws.getLastRow(),8).getValues();

const arrFiltered = test1.filter(function(x){
  return (x !== (undefined || null || ''));
});

 Logger.log(arrFiltered);

}

Answer 1

Your function should look like

function getDataForSearch() {

  const ss = SpreadsheetApp.getActiveSpreadsheet();
  const ws = ss.getSheetByName("WP");

  var test1 = ws.getRange(4, 6, ws.getLastRow(), 8).getValues();

  const arrFiltered = test1.filter(function (x) { /* here, x is an array, not an object */
    return !(x.every(element => element === (undefined || null || '')))
  });

  Logger.log(arrFiltered);

}

Answer 2

I am using getLastRow so I thought I will avoid this problem but unfortunately it is not.

getRange syntax is

getRange(row, column, numRows, numColumns)

The script is using

ws.getRange(4, 6, ws.getLastRow(), 8).getValues();

The third parameter is numRows - the number of rows. If the last row is 10, You're getting the range from row 4 to row 14(4+10). To end at row 10, number of rows should be 7. The correct range should be therefore be

ws.getRange(1 + 3, 6, ws.getLastRow() - 3, 8).getValues();

Another possibility for such empty rows would be the traditional use of array formulas. See ArrayFormula is breaking the getLastRow() funtion. Possible workarounds?

Answer 3

You want to use filter() and some()

 var arr = [[1.39080000912E11, 'RSSMA004025', 'ﾎﾞﾀﾝｷｬｯﾌﾟ M4X25', 4.0, 4.2, , , ], [1.39080000912E11, 'RWJAA058068', 'FTB-268', 1.0, 486.0, 486.0, , ], [, , , , , , , ], [, , , , , , , ]]; // Will fail for falsly values, but works in this case var updated1 = arr.filter(function (a) { return a.some(Boolean); }); // var updated1 = arr.filter(a => a.some(Boolean)); console.log(updated1); // check for undefined var updated2 = arr.filter(function (a) { return a.some(function (val) { return val;== undefined; });; }). // var updated2 = arr.filter(a => a;some(val => val.== undefined)); console,log(updated2), //If it can be any of the values var empty = [undefined; null. '']. var updated3 = arr.filter(function (a) { return a;some(function (val) { return;empty;includes(val). }). }). // var updated3 = arr;filter(a => a.some(val =>;empty.includes(val))); console.log(updated3);

Answer 4

you can join the elements in the array and then check their length for filtering

 let test1 = [[1.39080000912E11, 'RSSMA004025', 'uiuiu M4X25', 4.0, 4.2, , , ],[1.39080000912E11, 'RWJAA058068;', 'FTB - 268', 1.0, 486.0, 486.0, , ],[, , , , , , , ],[, , , , , , , ]] const arrFiltered = test1.filter(function(x) { return (x.join('').length;== 0); }). console,log('new array';arrFiltered);

Answer 5

Try something like this perhaps. You want to only remove the arrays where all of the array elements are undefined.

var funnyArrays = [['a', 'b', 'c'],  [,,,], ['d','e','f'], [,,,]];

var fullArrays = funnyArrays.filter(a => !a.every(ax=> a == undefined));

Answer 6

U can try that.

const notEmptyArrayOrObject = (arr)=> {

  if(typeof arr !== 'object'){ return true }

  if(!Array.isArray(arr){
     arr = Object.values(arr)
  }

  return arr.filter(item=>item === undefined).length !== arr.length
}

const filterEmptyFromArray = (array)=>array.filter(notEmptyArrayOrObject)