gaspersic/freeCodeCamp
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Added a solution/fixed stub :) (#34198)

Browse Source 
Added a solution to the stub regardingn Javascript Algorithms And Data Structures Certification\Regular Expressions
This commit is contained in:
AlexandreLeFou
2018-11-07 04:48:58 +01:00
committed by Paul Gamble
parent 2910a9e6ac
commit ce33b6c650
1 changed files with 21 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
guide/english/certifications/javascript-algorithms-and-data-structures/regular-expressions/specify-exact-number-of-matches/index.md
View File

@@ -3,8 +3,26 @@ title: Specify Exact Number of Matches
---
## Specify Exact Number of Matches
This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/certifications/javascript-algorithms-and-data-structures/regular-expressions/specify-exact-number-of-matches/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>.
### Hint 1:
We see that the answer is simply finding 4 m's in a row. The first anwser would be to match EXACTLY 4 times the character so we shall implement as following:
````javascript
let timRegex = /m{4}/;
````
This solution is incorrect because you wont pass the final test case ("Timber" with 30 m's in it) as there are multiple times mmmm in a row of 30 m.
You should try to get **no more than** ***(4 times m) mmmm***.
<a href='https://github.com/freecodecamp/guides/blob/master/README.md' target='_blank' rel='nofollow'>This quick style guide will help ensure your pull request gets accepted</a>.
### Hint 2:
Based on the above I will try to specify exactly the characters before and after 4 times m!
***Remember:*** e.g. /b/ is a string literal for the word b so what if before and after mmmm we add ALL missing letters?
### Solution
From hint 1 we defined how to find mmmm in the timStr. From hint 2 we observe that we need to find the word Timmmmber=Tim{4}ber.
We simpply add the exact word in our timRegex value and the final result is:
````javascript
let timStr = "Timmmmber";
let timRegex = /Tim{4}ber/; // Change this line
let result = timRegex.test(timStr);
````
<!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds -->