Google Apps脚本在两个数组中查找具有相同列值的行

Question

A = [{ 123, abc}, { 456, abc}, { 111, def}]
B = [{ 123, xyz}, { 111, def}, { 891, def}]

I have stored values of a google spreadsheet table in the two arrays A & B. I now want to create a new array C that only has the rows of array A where the first column of A matches the first column of B.

Note: The first column is a unique ID. There won't be any duplicates within each array's first column.

In the example given this would result in:

c =  [{ 123, abc}, { 111, def}]

Is this possible?

Answer 1

This code does what you want. I've tested it. You can view the LOGS, and see the results. The code creates two new objects from the arrays of objects.

var A = [{ 123:"abc"}, { 456:"abc"}, { 111:"def"}];

Is used to create:

var newObjA = {123:"abc", 456:"abc", 111:"def"};

And the same for array B. Then the code loops through the newObjA, and uses the key from each element in newObjA to look for a key of the same value in newObjB. If there is a match, a value is returned. If there is no matching key of the same value, then undefined is returned.

If undefined is returned, then there is no match, and no data get put into the final array. If there is a match, the matching element from newObjA is put into the final array.

There is a lot of data manipulation to retrieve and move data from one format into another. You'll need to study the code to figure it out.

function compareData() {
  var A = [{ 123:"abc"}, { 456:"abc"}, { 111:"def"}];
  var B = [{ 123:"xyz"}, { 111:"def"}, { 891:"def"}];

  Logger.log("A: " + A);
  Logger.log("B: " + B);

  var arryLengthA = A.length;
  var arryLengthB = B.length;

  var newObjA = {};
  var newObjB = {};
  var finalArry  = [];
  var thisIterationObj = {};

  //Convert Array A to an Ojbect A
  for (var i = 0; i < arryLengthA; i++) {
    Logger.log("count: " + i);
    thisIterationObj = {}; //reset to empty
    thisIterationObj = A[i];
    Logger.log("thisIterationObj: " + thisIterationObj);

    for (var thisKey in thisIterationObj) {
      Logger.log("thisKey: " + thisKey);
      Logger.log(thisIterationObj[thisKey]);

      newObjA[thisKey] = thisIterationObj[thisKey];
      Logger.log(newObjA[thisKey]);
    }
  };

  //Convert Array B to an Ojbect B
  for (var i = 0; i < arryLengthB; i++) {
    Logger.log("count: " + i);
    thisIterationObj = {}; //reset to empty
    thisIterationObj = B[i];
    Logger.log("thisIterationObj: " + thisIterationObj);

    //Create a new object of all values in array B
    for (var thisKey2 in thisIterationObj) {
      Logger.log("thisKey2: " + thisKey2);
      Logger.log(thisIterationObj[thisKey2]);

      newObjB[thisKey2] = thisIterationObj[thisKey2];
      Logger.log(newObjB[thisKey2]);
    }
  };

  //Compare Object A to Object B
  for (var keyObjA in newObjA) {
    thisIterationObj = {};
    //Find key of objA in objB

    var theMatch = newObjB[keyObjA];
    Logger.log("newObjB[keyObjA]: " + newObjB[keyObjA]);

    if (theMatch != undefined) {
      Logger.log("newObjB[keyObjA] " + newObjB[keyObjA]);
      thisIterationObj[keyObjA] = newObjA[keyObjA];
      finalArry.push(thisIterationObj);
    };
  };

  //Test the final result by looping through and displaying all values in the final array
  Logger.log("finalArry: " + finalArry);
  Logger.log("finalArry length: " + finalArry.length);

  //This code is a check to test for the correct result
  for (var i = 0; i < finalArry.length; i++) {
    thisIterationObj = {}; //reset to blank
    thisIterationObj = finalArry[i];

    for (var finalKey in thisIterationObj)
    Logger.log("finalArry value: " + i + ": " + finalKey + " : " + thisIterationObj[finalKey]);

  };
};