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Last edited Oct 3, 2017

Created on Oct 3, 2017

Five vertical blue bars form a simple bar chart, with heights of 100 through 500 pixels. The visualization uses D3 v4 to map an array of five numbers to SVG rectangles. The `d3.selectAll` selection with `.attr` methods positions each rectangle based on its array index and scales its height relative to the data value. Bar widths remain fixed at 50 pixels, with white strokes separating each bar against a black background.

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