Oliver Eyton-Williams ee1e8abd87

feat(curriculum): restore seed + solution to Chinese (#40683 )

* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>

2021-01-12 19:31:00 -07:00

3.0 KiB

Raw Blame History

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
594dc6c729e5700999302b45	Balanced brackets	5	302230	balanced-brackets

--description--

Determine whether a generated string of brackets is balanced; that is, whether it consists entirely of pairs of opening/closing brackets (in that order), none of which mis-nest.

Examples:

Input	Output
`[]`	true
`][`	false
`[][]`	true
`][]`	false
`[]][[]`	false
`[[[[]]]]`	true

--hints--

isBalanced should be a function.

assert(typeof isBalanced === 'function');

isBalanced("[]") should return true.

assert(isBalanced(testCases[0]));

isBalanced("]][[[][][][]][") should return false.

assert(!isBalanced(testCases[1]));

isBalanced("[][[[[][][[[]]]]]]") should return true.

assert(isBalanced(testCases[2]));

isBalanced("][") should return false.

assert(!isBalanced(testCases[3]));

isBalanced("[[[]]]][[]") should return false.

assert(!isBalanced(testCases[4]));

isBalanced("][[]") should return false.

assert(!isBalanced(testCases[5]));

isBalanced("][[][]][[[]]") should return false.

assert(!isBalanced(testCases[6]));

isBalanced("[[][]]][") should return false.

assert(!isBalanced(testCases[7]));

isBalanced("[[[]]][[]]]][][[") should return false.

assert(!isBalanced(testCases[8]));

isBalanced("[]][[]]][[[[][]]") should return false.

assert(!isBalanced(testCases[9]));

isBalanced("][]][[][") should return false.

assert(!isBalanced(testCases[10]));

isBalanced("[[]][[][]]") should return true.

assert(isBalanced(testCases[11]));

isBalanced("[[]]") should return true.

assert(isBalanced(testCases[12]));

isBalanced("]][]][[]][[[") should return false.

assert(!isBalanced(testCases[13]));

isBalanced("][]][][[") should return false.

assert(!isBalanced(testCases[14]));

isBalanced("][][") should return false.

assert(!isBalanced(testCases[15]));

isBalanced("[]]]") should return false.

assert(!isBalanced(testCases[16]));

isBalanced("") should return true.

assert(isBalanced(testCases[17]));

--seed--

--after-user-code--

const testCases = [
  '[]',
  ']][[[][][][]][',
  '[][[[[][][[[]]]]]]',
  '][',
  '[[[]]]][[]',
  '][[]',
  '][[][]][[[]]',
  '[[][]]][',
  '[[[]]][[]]]][][[',
  '[]][[]]][[[[][]]',
  '][]][[][',
  '[[]][[][]]',
  '[[]]',
  ']][]][[]][[[',
  '][]][][[',
  '][][',
  '[]]]',
  ''
];

--seed-contents--

function isBalanced(str) {

  return true;
}

--solutions--

function isBalanced(str) {
  if (str === '') return true;
  let a = str;
  let b;
  do {
    b = a;
    a = a.replace(/\[\]/g, '');
  } while (a !== b);
  return !a;
}

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