Sample problems 3: objects and arrays

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Sample problems 3: objects and arrays

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Last edited Feb 27, 2018

Created on Feb 27, 2018

This example presents four JavaScript practice problems centered on manipulating arrays of objects, specifically U.S. state data with name, ID, and population fields. The page instructs users to solve the problems in the browser console, as no SVG or visual output is generated. The first problem demonstrates using `d3.mean()` with an accessor function to calculate the average population, while subsequent problems require computing the same statistic manually without D3’s helper. The code relies on the D3 v4 library for the mean calculation and includes sample data hardcoded in the script.

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