How do I find the index of the first empty cell in a specific column of an array?

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xanderwood's avatar
xanderwood

  • I want to determine the index of the first empty cell in a particular column of an array (The column has multiple rows (cell) filled with data). Once I find the first empty cell, I'd like to perform an action based on its position. Basically, I want to fetch its position.

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  • If I understood correctly, something like this will do (probably there's a simpler way)

    + Button: On clicked

    | Local boolean emptyFound‎ = false

    | Local number targetColumn‎ = 2

    ----+ Array: For each XY element

    ----+ Array: Current value = ""

    ----+ System: Array.CurX = targetColumn

    --------+ System: [X] Is emptyFound

    ---------> Functions: Call DoSomething (xIndex: Array.CurX , yIndex: Array.CurY)

    ---------> System: Set emptyFound to True

    * On function 'DoSomething'

    * Parameter 'xIndex' (Number)

    * Parameter 'yIndex' (Number)

    -> Text: Set text to xIndex & "," & yIndex

  • array.IndexOf(0), this works as empty array cells return null

    edit: sorry I just read you are looking for a specific collumn, my bad

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  • thanks, cesisco, also I managed to do it with JS so posting the answer for future users. 

    const arrayInstance = runtime.objects.C3_Array.getFirstInstance();
const columnIndex = 4; // Target column

let indexOfEmptyCell = -1; // Initialize with a default value in case no empty cell is found

for (let rowIndex = 0; rowIndex < arrayInstance.height; rowIndex++) {
 const cellValue = arrayInstance.getAt(columnIndex, rowIndex);
 if (cellValue === '') {
 indexOfEmptyCell = rowIndex;
 break;
 }
}

runtime.globalVars.IndexOf_Empty_Cell_GV = indexOfEmptyCell;

// IndexOf_Empty_Cell_GV is a Global Variable of C3 event sheet where I put the output.
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