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framp/uniqueByFunction.js

Created May 3, 2016 13:58
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unique by function
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uniqueByFunction.js
const users = [{userId:"34"},{userId: "10"}, {userId: "1"}, {userId: "1"}]
const sameUserId = (a, i) => (b, j) => a.userId === b.userId && j>i
users.filter((value, index, array) => array.findIndex(sameUserId(value, index)) < 0)
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