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said-and-done/d3.nest.rollup.js

Created January 12, 2017 15:51
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d3.nest.rollup.js
d3.nest()
.key(function(num) { return num % 2 == 0 ? "even" : "odd"; })
.rollup(function(values) { return values.length; })
.map([1, 2, 3, 4, 5]);
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