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* fix: recursion challenges that abuse global space #43516 * fix challenge phrasing and create separate test * fix: challenges which pollute/impure functions should not pass * Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/cash-register.md allow users to ab(use) global space in cash register Co-authored-by: Tom <20648924+moT01@users.noreply.github.com> * Update curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/build-a-roman-numeral-converter-project/roman-numeral-converter.md allow users to abuse global space in roman numeral converter Co-authored-by: Tom <20648924+moT01@users.noreply.github.com> Co-authored-by: kravmaguy <flex4lease@gmail.com> Co-authored-by: Tom <20648924+moT01@users.noreply.github.com>
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id, title, challengeType, forumTopicId, dashedName
| id | title | challengeType | forumTopicId | dashedName |
|---|---|---|---|---|
| ab306dbdcc907c7ddfc30830 | Steamroller | 1 | 16079 | steamroller |
--description--
Flatten a nested array. You must account for varying levels of nesting.
--hints--
steamrollArray([[["a"]], [["b"]]]) should return ["a", "b"].
assert.deepEqual(steamrollArray([[['a']], [['b']]]), ['a', 'b']);
steamrollArray([1, [2], [3, [[4]]]]) should return [1, 2, 3, 4].
assert.deepEqual(steamrollArray([1, [2], [3, [[4]]]]), [1, 2, 3, 4]);
steamrollArray([1, [], [3, [[4]]]]) should return [1, 3, 4].
assert.deepEqual(steamrollArray([1, [], [3, [[4]]]]), [1, 3, 4]);
steamrollArray([1, {}, [3, [[4]]]]) should return [1, {}, 3, 4].
assert.deepEqual(steamrollArray([1, {}, [3, [[4]]]]), [1, {}, 3, 4]);
Your solution should not use the Array.prototype.flat() or Array.prototype.flatMap() methods.
assert(!code.match(/\.\s*flat\s*\(/) && !code.match(/\.\s*flatMap\s*\(/));
Global variables should not be used.
steamrollArray([1, {}, [3, [[4]]]])
assert.deepEqual(steamrollArray([1, {}, [3, [[4]]]]), [1, {}, 3, 4])
--seed--
--seed-contents--
function steamrollArray(arr) {
return arr;
}
steamrollArray([1, [2], [3, [[4]]]]);
--solutions--
function steamrollArray(arr) {
if (!Array.isArray(arr)) {
return [arr];
}
var out = [];
arr.forEach(function(e) {
steamrollArray(e).forEach(function(v) {
out.push(v);
});
});
return out;
}