[ISSUE #86]✨Add character-based methods to CheetahString: starts_with_char, ends_with_char, and contains_char

[mxsm]

fix #86

Summary by CodeRabbit

• New Features
  • Added three new character-based predicate methods: starts_with_char(), ends_with_char(), and contains_char() for checking strings by individual characters.
  • Added example demonstrating the new character-based predicates alongside existing string-based methods.

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[coderabbitai]

📝 Walkthrough

Walkthrough

This PR adds three new character-based predicate methods to CheetahString (starts_with_char, ends_with_char, contains_char) and includes a new example file demonstrating their usage alongside existing string-based methods.

Changes

Cohort / File(s)	Summary
New Example File examples/char_methods.rs	New example file demonstrating character-based predicates on CheetahString, showcasing starts_with_char(), ends_with_char(), contains_char() alongside existing string-based variants
Character Methods Implementation src/cheetah_string.rs	Three new public methods added: starts_with_char(char) -> bool, ends_with_char(char) -> bool, contains_char(char) -> bool; each delegates to the corresponding &str predicate method

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

A rabbit hops with glee so bright, 🐰
New char methods, oh what a sight!
Starts and ends and holds them true,
CheetahString now swift and new!
Character checks, fast as can be—
Simple, elegant, and fancy-free! ✨

Pre-merge checks and finishing touches

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: adding three character-based methods to CheetahString, matching the linked issue #86.
Linked Issues check	✅ Passed	The PR successfully implements all three required methods (starts_with_char, ends_with_char, contains_char) as specified in issue #86.
Out of Scope Changes check	✅ Passed	All changes are directly related to implementing the character-based methods requested in issue #86; no out-of-scope modifications detected.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

✨ Finishing touches

• 📝 Generate docstrings

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📜 Recent review details

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 7d48abb and 9239193.

📒 Files selected for processing (2)

• examples/char_methods.rs
• src/cheetah_string.rs

🧰 Additional context used

🧬 Code graph analysis (1)

examples/char_methods.rs (1)

src/cheetah_string.rs (18)

• from (30-32)
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• from (163-165)
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• from (243-245)
• starts_with_char (483-485)
• ends_with_char (515-517)
• contains_char (547-549)
• starts_with (467-469)
• ends_with (499-501)
• contains (531-533)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)

• GitHub Check: Agent

🔇 Additional comments (4)

src/cheetah_string.rs (3)

471-485: LGTM! Clean implementation of character-based predicate.

The method correctly delegates to str::starts_with(char) and provides a clear, ergonomic API for character-based checks. Documentation includes helpful examples.

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503-517: LGTM! Consistent implementation.

The method correctly delegates to str::ends_with(char) and follows the same pattern as starts_with_char. Documentation is clear and complete.

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535-549: LGTM! Completes the character-based predicate API.

The method correctly delegates to str::contains(char) and maintains consistency with the other two character-based methods. The implementation is clean and well-documented.

examples/char_methods.rs (1)

1-22: LGTM! Excellent example demonstrating the new API.

The example clearly demonstrates all three new character-based methods with both positive and negative test cases. The comparison with existing string-based methods (lines 18-21) helps users understand when to use each approach. Well-structured and educational.

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[Copilot]

Pull request overview

This PR adds three new character-based convenience methods to CheetahString that provide more ergonomic ways to check for single characters compared to the existing string-based methods. These methods delegate directly to Rust's standard library str methods that accept char parameters.

Key Changes:

• Added starts_with_char, ends_with_char, and contains_char methods that accept char parameters
• Included comprehensive inline documentation with examples for each new method
• Added an example file demonstrating usage of all three new methods

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
src/cheetah_string.rs	Implements three new character-checking methods (starts_with_char, ends_with_char, contains_char) with inline documentation and usage examples
examples/char_methods.rs	Demonstrates usage of the new character-based methods alongside the existing string-based methods

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