Google Apps 脚本：比较数组的唯一值

Question

I'm working from the solution provided HERE to compare two arrays. The example provided returns values found in both arrays to Array1 ( same ) and values only found on one or the other two Array2 ( diff ).

ISSUE: When I apply it to my own script, valuesDATA returns nothing and valuesCheckSeeding returns ALL values from both arrays

DESIRED RESULT: I have two arrays that I'd either like to create a third out of, or only select values from the first array, valuesDATA which are NOT present in the second, valuesCheckSeeding . Using the solution above, I was trying to have all values not found in valuesCheckSeeding AND valuesDATA pushed to valuesDATA .

SAMPLE OF valuesDATA : "U09 F Harford FC Hill/Healey - A MD CMSA Girls Saturday U09 A/B North Premier - Top TID0118"

What am I doing wrong? I tinkered with changing matchfound==false and matchfound=true in the loop, but that still didn't give me the desired result.

MOST RELEVANT SNIPPET

var matchfound = false;

for (var i = 0; i < valuesDATA.length; i++) {
  matchfound=false;
    for (var j = 0; j < valuesCheckSeeding.length; j++) {
      if (valuesDATA[i] == valuesCheckSeeding[j]) {
        valuesCheckSeeding.splice(j, 1);
        matchfound=true;
        continue;
        }
        }
          if (matchfound==false) {
            valuesCheckSeeding.push(valuesDATA[i]);
            valuesDATA.splice(i, 1);
            i=i-1;
            }
          }

WORKIG SCRIPT EDITED FROM COMMENTS/ANSWERS BELOW

//UPDATE SEEDING SHEET
function updateSeedingSheet() {

var today = Utilities.formatDate(new Date(),Session.getScriptTimeZone(), "MM/dd/yyyy hh:mm a");   

//INPUT SHEET INFO
var inputCurrentRow = 4;
var inputCurrentColumn = 20;
var inputNumRows = 1000;
var inputNumColumns =1;

var ssInput = SpreadsheetApp.openById('1Wzg2BklQb6sOZzeC0OEvQ7s7gIQ07sXygEtC0CSGOh4');
var sheetDATA = ssInput.getSheetByName('DATAREF');
var rangeDATA = sheetDATA.getRange(inputCurrentRow, inputCurrentColumn, inputNumRows, inputNumColumns);
var valuesDATA = rangeDATA.getValues();


//SEEDING SHEET INFO
var seedingCurrentRow = 4;
var seedingCurrentColumn = 1;
var seedingNumRows = 1000;
var seedingNumColumns = 1;

var ssSeeding = SpreadsheetApp.openById('1DuCHeZ3zba-nHq-7vYTrylncPGqcA1J9jNyW9DaS3mU');
var sheetSeeding = ssSeeding.getSheetByName('Seeding');
var rangeCheckSeeding = sheetSeeding.getRange(4, 102, 1000, 1);
var columnToClear = sheetSeeding.getRange(seedingCurrentRow, seedingCurrentColumn, seedingNumRows, seedingNumColumns);
var valuesCheckSeeding = rangeCheckSeeding.getValues();


//METHOD TO FILTER
valuesCheckSeeding = valuesCheckSeeding.map(function(e){return e[0];}); //flatten this array
var filteredArr = valuesDATA.filter(function(e){
    return !(this.indexOf(e[0])+1);
},valuesCheckSeeding);
Logger.log(filteredArr);
Logger.log(filteredArr.length);

var rangeSeeding = sheetSeeding.getRange(seedingCurrentRow, seedingCurrentColumn, filteredArr.length, seedingNumColumns);

sheetSeeding.getRange('A1').setValue(today);
columnToClear.clearContent();
rangeSeeding.setValues(filteredArr);



/*
//ALTERNATIVE METHOD USING LOOPS
for (var i = 0; i < valuesDATA.length; i++) {
    for (var j = 0; j < valuesCheckSeeding.length; j++) {
      if (valuesDATA[i][0] == valuesCheckSeeding[j][0]) {
        valuesDATA.splice(i, 1);
        i--; //account for the splice
        break; //go to next i iteration of loop
          }
       }
     }
          Logger.log("VALUES DATA:" + valuesDATA);
          Logger.log("VALUES CHECK SEEDING: " + valuesCheckSeeding);         

//sheetSeeding.getRange('A1').setValue(today);
//rangeSeeding.clearContent();
//rangeSeeding.setValues(valuesDATA); //INCORRECT RANGE HEIGHT, WAS 71 BUT SHOULD BE 1000 - Is splice affecting this? 

*/

}//END FUNCTION

Answer 1

V8(ES2016 update):

• You can use newer and efficient set class

 const array1 = [[1],[2],[3]], array2 = [[1],[3],[4]], set = new Set(array2.flat()) console.info(array1.filter(e => !set.has(e[0]))) //expected output [[2]]

---

• You're checking a 2D array. You'd need to use [i][0] and [j][0]
• You can try only splicing valuesDATA

Try

for (var i = 0; i < valuesDATA.length; i++) {
    for (var j = 0; j < valuesCheckSeeding.length; j++) {
      if (valuesDATA[i][0] == valuesCheckSeeding[j][0]) {
        valuesDATA.splice(i, 1);
        i--; //account for the splice
        break; //go to next i iteration of loop
        }
     }
}
Logger.log(valuesDATA);

---

Alternatively, try

valuesCheckSeeding = valuesCheckSeeding.map(function(e){return e[0];}); //flatten this array
var filteredArr = valuesDATA.filter(function(e){
    return !(this.indexOf(e[0])+1);
},valuesCheckSeeding);
Logger.log(filteredArr);