How to Autofill last row with formula, when data is received from IFTTT on the last row?

Question

I have a spreadsheet: https://docs.google.com/spreadsheets/d/1df2cp4DsJvSeBvhsNjLgIa5x_RO1X7s_APRdFzU6jqQ/edit?usp=sharing

|    | C                                    


        

Answer 1

Solution:

• This solution uses google-apps-script. This does not need array formulas, but uses autofill. For the solution to work, you should not use array formula, but plain formula.
• Get the active range, which will represent the current range inserted onChange or onFormSubmit.
• offset the range to the right to get the calculated columns and expand the range to all of calculated columns on the right.
• Use range.autoFillToNeighbor to fill all the calculated regions of the range.

Sample script:

/**
 * @param {GoogleAppsScript.Events.SheetsOnChange|GoogleAppsScript.Events.SheetsOnFormSubmit} e
 */
const onFormSubmitORonChange = e => {
  const rg = SpreadsheetApp.getActiveRange(),
    wd = rg.getWidth(),
    sh = rg.getSheet(),
    lc = sh.getLastColumn(),
    numRows = Math.max(
      rg
        .offset(0, wd, 1, 1)
        .getNextDataCell(SpreadsheetApp.Direction.UP)
        .getRow() - 1,
      1
    ),
    numCols = lc - wd;
  sh.getRange(2, wd + 1, numRows, numCols).autoFillToNeighbor(
    SpreadsheetApp.AutoFillSeries.DEFAULT_SERIES
  );
};

References:

• How to create a onFormSubmit or onChange trigger for this function?

Answer 2

This is a very common problem when dealing with auto-inserted data through sheets api or Google forms. The easiest solution would be to convert all your formulas into arrayformulas. For eg, Your formula in D2

=MID(C2,1,2)&"."&MID(C2,3,2)&".2020

can be modified as

In D1:

=ARRAYFORMULA({"Extracted Date";MID(C2:INDEX(C:C,COUNTA(C:C)),1,2)&"."&MID(C2:INDEX(C:C,COUNTA(C:C)),3,2)&".2020"})

OR using regex:

=ARRAYFORMULA({"Extracted Date";REGEXREPLACE(C2:INDEX(C:C,COUNTA(C:C)),"(\d{2})(\d{2}).*","$1.$2.2020")})

The table then becomes:

|    | C                               | D                                                                                                                   |
|----+---------------------------------+---------------------------------------------------------------------------------------------------------------------|
| 1> | From IFTTT                      | =ARRAYFORMULA({"Extracted Date";MID(C2:INDEX(C:C,COUNTA(C:C)),1,2)&"."&MID(C2:INDEX(C:C,COUNTA(C:C)),3,2)&".2020"}) |
| 2> | 0809 1800 0909 0600 RLK Steiger |                                                                                                                     |
| 3> | 0809 1800 0909 0600 RLK Dvorak  |                                                                                                                     |
| 4> | 0909 0600 0909 1800 UNIS Brando |                                                                                                                     |

Here the rest of D:D is auto filled automatically.

• We use array literals on the header row: {"Extracted Date";Formula for rest of the column}

• Whenever a new row comes, INDEX/COUNTA() auto calculates the last row and automatically fills the formula upto last row. See here for a deeper explanation on INDEX/COUNTA.