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inodaf/intersection.js

Created June 28, 2019 12:20
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Find Intersection in Array
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intersection.js
const intersection = (a, b) =>
a.map(ai => b.filter(bi => bi === ai)).flat()
intersection(['banana', 'apple'], ['banana', 'mellon']) // ['banana']
intersection(['banana', 'apple'], ['banana', 'mellon', 'apple']) // ['banana', 'apple']
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