從一個陣列向另一個陣列推送數據的問題

Question

我一直在努力處理這段代碼一段時間。我試圖循環訪問一個數組（從Google Spreadsheet數據創建）並有條件地將整行數據（基於該行中一個單元格的內容）複製到具有相同列數的新行數組中。然後，我計劃將此數組寫入電子表格中的匹配範圍。

數據陣列似乎正在正常工作，[k]作爲行索引，而[u]作爲列索引。

目前我看到這個錯誤，當我運行時：TypeError：無法從undefined @這行代碼讀取屬性「0」：targetArray [m] [u] .push（data [k] [u]）;當我通過這段代碼：targetArray [m] [u] .push（data [k] [u]）時，值爲m = 0，u = 0，k = 2，i = 5。那麼，爲什麼data [5] [0]中的數組元素不能寫入targetArray [0] [0]？如果這個特定的單元格是空的，那麼它仍然應該被複制到數組中，對吧？我不確定「未定義」是從哪裏來的。目標數組從初始化設置爲[]。示例數據數組元素是：[「」，「」，「Display」，「」，1，「A」，「」，「」，「」] - > 1行和9列。

任何指針？

var sheetArray = ss.getSheets(); //returns an array of all the sheets 
var numSheets = sheetArray.length; 
var targetArray = []; 
var m = 0; //target array counter 

for (j = 6; j < numSheets; j++) { 

    var data = sheetArray[j].getDataRange().getValues(); //getdatarange -> return the range of the data for the active sheet // getvalues -> returns 2D array of values for the given range 
    var numRows = data.length; //returns the number of rows in the data array 
    var numColumns = data[1].length; //returns the number of columns in the 2nd row of the data array 

    for (var i = 0; i < numColumns; i++) { //loop through all columns of active sheet 

    if (data[1][i] == "Build Prio [Alpha(A), Beta(B)]") { //check data heading value in each column of Row 2, when column heading matches run next for loop 

     for (var k = 0; k < numRows; k++) { //k = row index & i = column index 

     if (data[k][i] == 'A') { // check if cell contents are equal to A 

      for (var u = 0; u < numColumns; u++) { //loop through all columns in the current row 

      targetArray[m][u].push(data[k][u]); //set the value of each column in the current row to the new array     

      } 

      m++; //advances the targetArray row index        

     } 
     } 
    } 
    } 
} 

Answer 1

在代碼中添加了一些註釋。不要在數組中執行m ++ push（）:)

var sheetArray = ss.getSheets(); //returns an array of all the sheets 
var numSheets = sheetArray.length; 
var targetArray = []; 
var m = 0; //target array counter 

for (j = 6; j < numSheets; j++) { 

    var data = sheetArray[j].getDataRange().getValues(); //getdatarange -> return the range of the data for the active sheet // getvalues -> returns 2D array of values for the given range 
    var numRows = data.length; //returns the number of rows in the data array 
    var numColumns = data[1].length; //returns the number of columns in the 2nd row of the data array 

    for (var i = 0; i < numColumns; i++) { //loop through all columns of active sheet 

    if (data[1][i] == "Build Prio [Alpha(A), Beta(B)]") { //check data heading value in each column of Row 2, when column heading matches run next for loop 

     for (var k = 0; k < numRows; k++) { //k = row index & i = column index 

     if (data[k][i] == 'A') { // check if cell contents are equal to A 

      //just push the whole row at once: 
      targetArray.push(data[k]); //push the whole row in targetarray    

      } 
      //no need for m++ since push adds a row. 

     } 
     } 
    } 
    } 
}