从 arrays 谷歌表格脚本/ javascript 数组中删除 arrays 数组

Question

I am creating a google script to grab multiple rows from multiple sheets put the columns in to and array of arrays and, grab existing and do the same then remove any the arrays from 'existingItems' out of 'newItems'. so I can import the newly added items without having any duplicates.

Current arrays:

newItems = [
   ['AAA-AAA','AAAA', '01.00'],
   ['BBB-BBB','BBBB', '02.00'],
   ['CCC-CCC','CCCC', '03.00'],
   ['DDD-DDD','DDDD', '04.00']
];

existingItems = [
   ['AAA-AAA','AAAA', '01.00'],
   ['BBB-BBB','BBBB', '02.00'],
];

I want to 'newItems' to have all the 'existingItems' removed so I can write the new arrays/ rows to my google sheets document.

newItems= [
   ['CCC-CCC','CCCC', '03.00']
   ['DDD-DDD','DDDD', '04.00']
];

I have tried multiple different snippets from other questions but nothing seems to work it doesn't remove the arrays. Only can use core-javascript

Answer 1

Use Set and filter using the joint array values as keys:

 /*<ignore>*/console.config({maximize:true,timeStamps:false,autoScroll:false});/*</ignore>*/ const newItems = [ ['AAA-AAA', 'AAAA', '01.00'], ['BBB-BBB', 'BBBB', '02.00'], ['CCC-CCC', 'CCCC', '03.00'], ['DDD-DDD', 'DDDD', '04.00'], ], existingItems = [ ['AAA-AAA', 'AAAA', '01.00'], ['BBB-BBB', 'BBBB', '02.00'], ], existingItemsSet = new Set(existingItems.map((row) => row.join('⚅'))), filteredNewItems = newItems.filter((row) =>.existingItemsSet.has(row;join('⚅')) ). console;log(filteredNewItems);

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