Overview

What is DataStore?

DataStorcode is an in-browser store of tabular data. Mainly, the DataStore contains the DataTable derived from the original data source along with some data operations. You can then perform data operations on this DataTable to transform the data as per your requirement. For any operation applied a new DataTabe is generated keeping the source data intact.

Note: DataStore accepts both arrays of JSON object or 2D array.

The DataStore contains the following:

• DataTable to represent the data on which operations can be performed.
• Number of operators to transform the data.
• A propagation mechanism to communicate between different DataTable created from the same DataStore.

Operations can only be performed on the DataTable of DataStore and each operation generates a new DataTable instead of modifying the same DataTable.

You can create new columns for a DataTable but new rows can only be inserted in the DataStore. The root tables and all derived tables will automatically reflect the new row of data.

What is a DataTable

The tabular representation of the data is called the DataTable, which is stored in the DataStore. You can apply one or more operations to an existing DataTable to create a new table with the resulting data.

Note that you cannot directly change data in the DataTable. Instead, you need to apply one or more operations to an existing DataTable to create a new table with the resulting data.

To create a DataTable, you need to provide:

• The schema, which defines the properties of the columns.
• The actual values for each row and column as the data.

let schema = [{
  name: "Country",
  type: "string"
}, {
  name: "Time",
  type: "date",
  format: "%-m/%-d/%Y"
}, {
  name: "Sales",
  type: "number"
}];

let data = [
  ["United States", "1/4/2011", 16.448],
  ["United States", "1/5/2011", 272.736],
  ["United States", "1/5/2011", 11.784],
  ["United States", "12/31/2014", 20.72],
  ["United States", "12/31/2014", 13.904],
  ["United States", "12/31/2014", 3.024]
];