Empty an AWS DynamoDB table

empty.js

require('dotenv').config()
const AWS = require('aws-sdk');

AWS.config.update({
    credentials: {
      accessKeyId: 'xxx',
      secretAccessKey: 'xxx'
    },
    region: 'eu-central-1'
});

const docClient =  new AWS.DynamoDB.DocumentClient();
const tableName = 'table-name';

async function main() {
    const request = {
        TableName: tableName,
    }

    let itemCount = 1;
    while (itemCount > 0) {
        const result = await docClient.scan(request).promise();
        // the old, single item method, which takes way too long.
        // for(let iter = result.Items.length-1; iter >= 0; iter--) {
        //     const item = result.Items[iter];
        //     console.log('Deleting ' + item.email);
        //     await docClient.delete({ TableName: tableName, Key:  { email: item.email}}).promise();
        // }
        let deleteItems = [];
        for(let iter = result.Items.length-1; iter >= 0; iter--) {
            const item = result.Items[iter];
            deleteItems.push({
                DeleteRequest : {
                    Key : {
                        email : item.email,
                    }
                }
            });
        }

        while(deleteItems.length > 0) {
            const partitionedDeleteItems = deleteItems.slice(0,25);
            deleteItems = deleteItems.slice(26);
            const params = {
                RequestItems : {
                    [tableName] : partitionedDeleteItems,
                }
            };
            const writeResult = await docClient.batchWrite(params).promise();
            console.log('Deleted', partitionedDeleteItems.map(item => item.DeleteRequest.Key.email ));
        }
        itemCount = result.Items.length;
    }
}

main();