ee1e8abd87
* 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>
56 lines
1.2 KiB
Markdown
56 lines
1.2 KiB
Markdown
---
|
|
id: 587d7dbb367417b2b2512bac
|
|
title: Remove Whitespace from Start and End
|
|
challengeType: 1
|
|
forumTopicId: 301362
|
|
dashedName: remove-whitespace-from-start-and-end
|
|
---
|
|
|
|
# --description--
|
|
|
|
Sometimes whitespace characters around strings are not wanted but are there. Typical processing of strings is to remove the whitespace at the start and end of it.
|
|
|
|
# --instructions--
|
|
|
|
Write a regex and use the appropriate string methods to remove whitespace at the beginning and end of strings.
|
|
|
|
**Note:** The `String.prototype.trim()` method would work here, but you'll need to complete this challenge using regular expressions.
|
|
|
|
# --hints--
|
|
|
|
`result` should equal to `"Hello, World!"`
|
|
|
|
```js
|
|
assert(result == 'Hello, World!');
|
|
```
|
|
|
|
Your solution should not use the `String.prototype.trim()` method.
|
|
|
|
```js
|
|
assert(!code.match(/\.?[\s\S]*?trim/));
|
|
```
|
|
|
|
The `result` variable should not be set equal to a string.
|
|
|
|
```js
|
|
assert(!code.match(/result\s*=\s*".*?"/));
|
|
```
|
|
|
|
# --seed--
|
|
|
|
## --seed-contents--
|
|
|
|
```js
|
|
let hello = " Hello, World! ";
|
|
let wsRegex = /change/; // Change this line
|
|
let result = hello; // Change this line
|
|
```
|
|
|
|
# --solutions--
|
|
|
|
```js
|
|
let hello = " Hello, World! ";
|
|
let wsRegex = /^(\s+)(.+[^\s])(\s+)$/;
|
|
let result = hello.replace(wsRegex, '$2');
|
|
```
|