Using .each() for shared computation.
From D3 in Depth book by Peter Cook.
Last active
August 2, 2017 10:22
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Using .each() for shared computation
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| license: gpl-3.0 | |
| height: 170 | |
| border: no |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <head> | |
| <title>Selection .each</title> | |
| </head> | |
| <style> | |
| body { | |
| font-family: "Helvetica Neue", Helvetica, sans-serif; | |
| font-size: 14px; | |
| color: #333; | |
| } | |
| circle { | |
| fill: #ddd; | |
| cursor: pointer; | |
| } | |
| </style> | |
| <body> | |
| <svg width="760" height="140"> | |
| <g transform="translate(70, 70)"> | |
| <circle r="40" /> | |
| <circle r="40" cx="120" /> | |
| <circle r="40" cx="240" /> | |
| <circle r="40" cx="360" /> | |
| <circle r="40" cx="480" /> | |
| <circle r="40" cx="620" /> | |
| </g> | |
| </svg> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js"></script> | |
| <script> | |
| d3.selectAll('circle') | |
| .each(function(d, i) { | |
| var odd = i % 2 === 1; | |
| d3.select(this) | |
| .style('fill', odd ? 'orange' : '#ddd') | |
| .attr('r', odd ? 40 : 20); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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