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bendc/cloneSet.js

Created July 31, 2015 00:05
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Cross-browser cloneSet function
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cloneSet.js
const cloneSet = (() =>
new Set(new Set().add(1)).has(1)
? set => new Set(set)
: set => {
const clone = new Set();
set.forEach(item => clone.add(item));
return clone;
})();
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bendc commented Jul 31, 2015 

const foo = new Set().add("foo");
const bar = cloneSet(foo).add("bar");
bar.size; // => 2

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