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add: stub for regexp challenge - check for all or none (#31670)

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Mario Kandut
2018-12-21 02:25:09 +01:00
committed by Randell Dawson
parent 844f4ec699
commit 9ebc54e9d5
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guide/english/certifications/javascript-algorithms-and-data-structures/regular-expressions/check-for-all-or-none/index.md
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@ -3,11 +3,17 @@ title: Check for All or None
---
## Check for All or None
With Regular Expressions (RegExp) you can have modify your testing pattern with special charaters. To pass this challenge you the __quantifiers__ are very helpful. A quantifier is __?__ in __x?__.
### Hint:
The difference between american and british English for the given word is: favorite-favourite. We need to define the existance of the letter u .
__x?__ Matches the preceding item x 0 or 1 time.
For example, /e?le?/ matches the "el" in "angel" and the "le" in "angle."
If used immediately after any of the quantifiers *, +, ?, or {}, makes the quantifier non-greedy (matching the minimum number of times), as opposed to the default, which is greedy (matching the maximum number of times).
__Challenge Solution:__
## Solution
```javascript
let favWord = "favorite";
let favRegex = /favou?rite/; // Change this line