@ffras4vnpm/quae-fuga-repudiandae

Array.prototype.concat, but made safe by ignoring Symbol.isConcatSpreadable

Getting started

1npm install --save @ffras4vnpm/quae-fuga-repudiandae

Usage/Examples

1var safeConcat = require('@ffras4vnpm/quae-fuga-repudiandae');
2var assert = require('assert');
3
4assert.deepEqual([].concat([1, 2], 3, [[4]]), [1, 2, 3, [4]], 'arrays spread as expected with normal concat');
5assert.deepEqual(safeConcat([1, 2], 3, [[4]]), [1, 2, 3, [4]], 'arrays spread as expected with safe concat');
6
7String.prototype[Symbol.isConcatSpreadable] = true;
8assert.deepEqual([].concat('foo', Object('bar')), ['foo', 'b', 'a', 'r'], 'spreadable String objects are spread with normal concat!!!');
9assert.deepEqual(safeConcat('foo', Object('bar')), ['foo', Object('bar')], 'spreadable String objects are not spread with safe concat');
10
11Array.prototype[Symbol.isConcatSpreadable] = false;
12assert.deepEqual([].concat([1, 2], 3, [[4]]), [[], [1, 2], 3, [[4]]], 'non-concat-spreadable arrays do not spread with normal concat!!!');
13assert.deepEqual(safeConcat([1, 2], 3, [[4]]), [1, 2, 3, [4]], 'non-concat-spreadable arrays still spread with safe concat');

Tests

Simply clone the repo, npm install, and run npm test