fix(find, findLast): simplify logic by removing unnecessary checks

[wo-o29]

Summary

This PR simplifies the find function implementation by removing unnecessary type checks and simplifying array handling logic.

This fix improves test coverage.

Before	After

There is no test for the case where there is no predicate, so the coverage is not 100%. However, someone else worked on this part, so I did not modify it separately!

Changes

• Removed unnecessary typeof doesMatch === 'function' check since iteratee() always returns a function
• Simplified array handling: changed Array.isArray(source) ? source.slice(fromIndex) : Object.values(source).slice(fromIndex) to source.slice(fromIndex) since at that point in the code, source is guaranteed to be an array

Additional

The findLast function also had the same issue and was fixed. This function also did not have a test for the case where there is no predicate, so the coverage is not 100%, but someone else worked on it :) #1450

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Project	Deployment	Preview	Comments	Updated (UTC)
es-toolkit	Ready	Preview	Comment	Oct 9, 2025 4:29pm

[Copilot]

Pull Request Overview

This PR refactors the find function to simplify its logic by removing unnecessary type checks and streamlining array handling. The changes improve code maintainability while preserving functionality.

• Removed redundant typeof doesMatch === 'function' check since iteratee() always returns a function
• Simplified array slicing logic by removing conditional check that was no longer needed
• Improved test coverage as shown in the before/after screenshots

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.90%. Comparing base (21bd853) to head (95338a0).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1453      +/-   ##
==========================================
- Coverage   99.90%   99.90%   -0.01%     
==========================================
  Files         468      468              
  Lines        4439     4437       -2     
  Branches     1309     1307       -2     
==========================================
- Hits         4435     4433       -2     
  Misses          4        4              

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[sukvvon]

Hello! @wo-o29 I've created a PR(#1454) for what you were concerned about! 😄

[wo-o29]

Hello! @wo-o29 I've created a PR(#1454) for what you were concerned about! 😄

Confirmed, thank you!👍