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const map = require('extra-map'); var x = new Map([['a', 1], ['b', 2], ['c', 3], ['d', 4]]); map.submap(x); map.submap(x, 3, 0.3); map.submap(x, 2, 0.3);

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@extra-map/submap v2.1.30

Picks an arbitrary submap.

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