This example demonstrates how to bind an array of city objects to SVG shapes using D3.js, creating a horizontal bar chart where each bar's width represents the city's population. The visualization uses D3's `selectAll` and `.data()` method to join the data array to five rectangle elements, setting their height, width, and vertical position dynamically. City names are displayed as text labels to the right of each bar, with both rect and text elements updated in a single pass through the data. The chart renders as SVG, with a hover effect that turns bars orange, and uses a fixed scale factor to convert population values into pixel widths.