Clear all items from dynamodb table

dynamodb-clear-table.js

 function breakArrayIntoGroups(data, maxPerGroup) {
    const groups = [];

    for (let index = 0; index < data.length; index += maxPerGroup) {
      groups.push(data.slice(index, index + maxPerGroup));
    }

    return groups;
  }
  var wipeTable = async tableName => {
    const db = new AWS.DynamoDB({ apiVersion: "2012-10-08" });
    var info = await db
      .describeTable({
        TableName: tableName
      })
      .promise();

    var keyHash = info.Table.KeySchema.find(k => k.KeyType === "HASH")
      .AttributeName;

    console.log("key hash=", keyHash);

    var scan = await db
      .scan({
        TableName: tableName
      })
      .promise();
    console.log(`will delete ${scan.Items.length} items from ${tableName}`);

    const datagr = breakArrayIntoGroups(scan.Items, 25);

    for (let i = 0; i < datagr.length; i += 1) {
      const po = [];

      for (let i2 = 0; i2 < datagr[i].length; i2 += 1) {
        const item = datagr[i][i2];

        po.push(item);
      }

      await db
        .batchWriteItem({
          RequestItems: {
            [`${tableName}`]: po.map(s => ({
              DeleteRequest: {
                Key: {
                  [`${keyHash}`]: s[`${keyHash}`]
                }
              }
            }))
          }
        })
        .promise();
    }

    console.log("cleared table");
  };

  await wipeTable("test");