* 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>
1.3 KiB
1.3 KiB
id, title, challengeType, videoUrl, forumTopicId, dashedName
id | title | challengeType | videoUrl | forumTopicId | dashedName |
---|---|---|---|---|---|
bd7123c9c451eddfaeb5bdef | 使用方括号查找字符串中的最后一个字符 | 1 | https://scrimba.com/c/cBZQGcv | 18342 | use-bracket-notation-to-find-the-last-character-in-a-string |
--description--
要获取字符串的最后一个字符,可以用字符串的长度减 1 的索引值。
例如,在var firstName = "Charles"
中,你可以这样操作firstName[firstName.length - 1]
来得到字符串的最后的一个字符。
--instructions--
使用方括号<dfn来取得lastName变量中的最后一个字符。 提示
如果你遇到困难了,不妨看看在lastLetterOfFirstName
变量上是怎么做的。 </dfn来取得
--hints--
lastLetterOfLastName
应该是"e"。
assert(lastLetterOfLastName === 'e');
你需要使用.length
获取最后一个字符。
assert(code.match(/\.length/g).length === 2);
--seed--
--after-user-code--
(function(v){return v;})(lastLetterOfLastName);
--seed-contents--
// Setup
var lastName = "Lovelace";
// Only change code below this line
var lastLetterOfLastName = lastName; // Change this line
--solutions--
var lastName = "Lovelace";
var lastLetterOfLastName = lastName[lastName.length - 1];