May 2019
Beginner to intermediate
650 pages
14h 50m
English
Content preview from Learn D3.js
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Essential Javascript data structures
Data used as sources for visualizations is usually organized in some kind of structure. The most common structures are probably lists (arrays) and tables (maps), stored in some standard data format. When using data from external sources, you usually need to clean it up, removing unnecessary values, simplifying its structure, applying bounds, etc. After that you can parse it and finally store it locally in a JavaScript array or JavaScript object that can be used by the chart.
Once your data is stored in a JavaScript data structure, you can transform it further applying mathematical operations on the stored values. It’s useful to have a good knowledge of the main data structures used in JavaScript: arrays, ...
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