Sample problems 3: objects and arrays

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Sample problems 3: objects and arrays

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Last edited May 1, 2018

Created on May 1, 2018

This example presents two JavaScript practice problems for computing the mean population of a small array of U.S. states. The code uses D3 v4’s `d3.mean()` for the first solution, then demonstrates two alternative manual approaches—using `forEach` and a `while` loop—to calculate the same average. All results are printed to the browser’s developer console, as the page includes no SVG or visual output. The data is a hardcoded array of state objects containing name, ID, and population values.

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