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    uniqs

    2.0.0 • Public • Published

    Build Status

    Tiny utility to create unions and de-duplicated lists.

    Example:

    var uniqs = require('uniqs');
     
    var foo = { foo: 23 };
    var list = [3, 2, 2, 1, foo, foo];
     
    uniqs(list);
    // => [3, 2, 1, { foo: 23 }]

    You can pass multiple lists to create a union:

    uniqs([2, 1, 1], [2, 3, 3, 4], [4, 3, 2]);
    // => [2, 1, 3, 4]

    Passing individual items works too:

    uniqs(3, 2, 2, [1, 1, 2]);
    // => [3, 2, 1]

    Summary

    • Uniqueness is defined based on strict object equality.
    • The lists do not need to be sorted.
    • The resulting array contains the items in the order of their first appearance.

    About

    This package has been written to accompany utilities like flatten as alternative to full-blown libraries like underscore or lodash.

    The implementation is optimized for simplicity rather than performance and looks like this:

    module.exports = function uniqs() {
      var list = Array.prototype.concat.apply([], arguments);
      return list.filter(function(item, i) {
        return i == list.indexOf(item);
      });
    };

    License

    MIT

    Install

    npm i uniqs

    DownloadsWeekly Downloads

    6,582,039

    Version

    2.0.0

    License

    MIT

    Last publish

    Collaborators

    • fgnass