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feat: add sentinel search algorithm #1683

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Describe your change:

  • [ ✅ ] Add an algorithm?
  • Fix a bug or typo in an existing algorithm?
  • Documentation change?

Checklist:

  • [ ✅ ] I have read CONTRIBUTING.md.
  • [ ✅ ] This pull request is all my own work -- I have not plagiarized.
  • [ ✅ ] I know that pull requests will not be merged if they fail the automated tests.
  • [ ✅ ] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
  • [ ✅ ] All new JavaScript files are placed inside an existing directory.
  • [ ✅ ] All filenames should use the UpperCamelCase (PascalCase) style. There should be no spaces in filenames.
    Example:UserProfile.js is allowed but userprofile.js,Userprofile.js,user-Profile.js,userProfile.js are not
  • [ ✅ ] All new algorithms have a URL in their comments that points to Wikipedia or another similar explanation.
  • [ ✅ ] If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

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codecov-commenter commented Sep 12, 2024

Codecov Report

Attention: Patch coverage is 95.38462% with 3 lines in your changes missing coverage. Please review.

Project coverage is 84.70%. Comparing base (9010481) to head (2303b28).

Files with missing lines Patch % Lines
Search/TernarySearch.js 90.00% 3 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##           master    #1683      +/-   ##
==========================================
+ Coverage   84.65%   84.70%   +0.05%     
==========================================
  Files         378      379       +1     
  Lines       19744    19770      +26     
  Branches     2951     2959       +8     
==========================================
+ Hits        16715    16747      +32     
+ Misses       3029     3023       -6     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

@@ -18,16 +18,15 @@ export function quickSelectSearch(array, k) {

let from = 0
let to = array.length - 1

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Please keep unrelated changes out of this PR

@@ -0,0 +1,41 @@
/**
* @function sentinelSearch
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@appgurueu appgurueu Oct 2, 2024

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Suggested change
* @function sentinelSearch

* @example sentinelSearch([1,2,3], 2) => 1
* @example sentinelSearch([4,5,6], 2) => null
* @complexity_analysis
* Time Complexity :
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I think just O(n) or omitting it altogether would suffice here. It's pretty trivial to see.

while (from < to) {
let [left, right] = [from, to]
let left = from
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Please keep unrelated changes out of this PR.

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@appgurueu appgurueu left a comment

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I'm afraid there are still unrelated changes in this PR, namely the modification of TernarySearch and the associated tests.

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3 participants