feat: Implement intermediate/advanced Go concepts (exercises 14-27)

[zhravan]

Summary by CodeRabbit

• Chores

  • Aligned indirect dependency on testing library to v1.11.0 in go.mod for consistency with existing direct dependency.

• Refactor

  • Standardized map iteration in an exercise template by explicitly discarding key/value with blank identifiers, improving consistency and avoiding unused-variable issues. No change to runtime behavior.

[coderabbitai]

Walkthrough

Added an indirect dependency entry for github.com/stretchr/testify v1.11.0 in go.mod and adjusted a for-range loop in countMap to explicitly bind and discard key/value with blank identifiers. No functional behavior changes.

Changes

Cohort / File(s)	Summary of Changes
Module dependency update go.mod	Added indirect require for github.com/stretchr/testify v1.11.0 in the second require block; no other modifications.
Range loop binding fix internal/exercises/templates/16_range_built_in/range_built_in.go	Updated for range m to for _, _ = range m to explicitly bind and discard key/value during map iteration; behavior unchanged.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~6 minutes

Poem

A hop through go.mod, neat and light,
A loop now ranges just right.
Keys and values, hop-hop, pass by—
Blank IDs wink, no stray byte.
Testify whispers, “All’s tight.”
Carrot commits signed in the night. 🥕🐇

Tip

🔌 Remote MCP (Model Context Protocol) integration is now available!

Pro plan users can now connect to remote MCP servers from the Integrations page. Connect with popular remote MCPs such as Notion and Linear to add more context to your reviews and chats.

✨ Finishing Touches

• 📝 Generate Docstrings

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/other-concepts

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

🪧 Tips

Chat

There are 3 ways to chat with CodeRabbit:

• Review comments: Directly reply to a review comment made by CodeRabbit. Example:
  • I pushed a fix in commit <commit_id>, please review it.
  • Open a follow-up GitHub issue for this discussion.
• Files and specific lines of code (under the "Files changed" tab): Tag @coderabbitai in a new review comment at the desired location with your query.
• PR comments: Tag @coderabbitai in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples:
  • @coderabbitai gather interesting stats about this repository and render them as a table. Additionally, render a pie chart showing the language distribution in the codebase.
  • @coderabbitai read the files in the src/scheduler package and generate a class diagram using mermaid and a README in the markdown format.

Support

Need help? Create a ticket on our support page for assistance with any issues or questions.

CodeRabbit Commands (Invoked using PR/Issue comments)

Type @coderabbitai help to get the list of available commands.

Other keywords and placeholders

• Add @coderabbitai ignore anywhere in the PR description to prevent this PR from being reviewed.
• Add @coderabbitai summary to generate the high-level summary at a specific location in the PR description.
• Add @coderabbitai anywhere in the PR title to generate the title automatically.

CodeRabbit Configuration File (.coderabbit.yaml)

• You can programmatically configure CodeRabbit by adding a .coderabbit.yaml file to the root of your repository.
• Please see the configuration documentation for more information.
• If your editor has YAML language server enabled, you can add the path at the top of this file to enable auto-completion and validation: # yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json

Status, Documentation and Community

• Visit our Status Page to check the current availability of CodeRabbit.
• Visit our Documentation for detailed information on how to use CodeRabbit.
• Join our Discord Community to get help, request features, and share feedback.
• Follow us on X/Twitter for updates and announcements.

[zhravan]

@coderabbitai: Give PR title

[coderabbitai]

Tip

For best results, initiate chat on the files or code changes.

🧩 Analysis chain

I'll examine the PR changes to suggest an appropriate title for you.

---

🏁 Script executed:

#!/bin/bash
# Get the PR diff to understand what changes were made
git diff origin/main..HEAD --name-only

# Get more detailed diff to understand the nature of changes
git diff origin/main..HEAD --stat

# Look at the commit messages for additional context
git log origin/main..HEAD --oneline

Length of output: 3828

---

🏁 Script executed:

#!/bin/bash
# Look at the catalog update to understand the exercise structure
cat internal/exercises/catalog.yaml | tail -20

# Check one of the exercise files to understand the content
cat internal/exercises/templates/14_closures/closures.go

Length of output: 915

---

@zhravan Based on the PR changes, I can see this adds 14 new Go exercise templates covering advanced concepts (exercises 14-27). Here are some suggested PR titles:

Recommended:

• feat: Add advanced Go concepts exercises (closures, generics, interfaces, etc.)

Alternative options:

• feat: Add 14 advanced Go programming exercises
• feat: Implement intermediate/advanced Go concepts (exercises 14-27)
• feat: Add advanced Go topics - closures, generics, interfaces, structs, and more

The PR adds comprehensive coverage of important intermediate to advanced Go concepts including closures, recursion, pointers, structs, methods, interfaces, generics, error handling, and more. Each exercise comes with both implementation examples and corresponding tests.

[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (2)

go.mod (1)

14-14: Remove the duplicate indirect require in go.mod

The module currently lists github.com/stretchr/testify twice—once as a direct requirement (line 7) and once as an indirect requirement (line 14). You can safely drop the indirect entry to eliminate noise; the Go toolchain will tidy it away.

• File: go.mod
• Line to remove: 14

Suggested diff:

--- go.mod
+++ go.mod
@@
-	github.com/stretchr/testify v1.11.0 // indirect

internal/exercises/templates/16_range_built_in/range_built_in.go (1)

13-15: Prefer idiomatic range or just use len(m).

The assignment form with two blank identifiers for _, _ = range m is valid but atypical and harder to read. Either:

• keep it minimal and idiomatic: for range m { ... }, or
• if the goal isn’t to demonstrate range itself, return len(m).

Option A — keep the range loop, but idiomatic:

-	for _, _ = range m {
+	for range m {
 		count++
 	}

Option B — simplest and fastest (if pedagogy isn’t the point):

// outside selected range for clarity:
func countMap(m map[string]int) int {
	return len(m)
}

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

💡 Knowledge Base configuration:

• MCP integration is disabled by default for public repositories
• Jira integration is disabled by default for public repositories
• Linear integration is disabled by default for public repositories

You can enable these sources in your CodeRabbit configuration.

📥 Commits

Reviewing files that changed from the base of the PR and between 669e389 and 456bf4c.

📒 Files selected for processing (2)

• go.mod (1 hunks)
• internal/exercises/templates/16_range_built_in/range_built_in.go (1 hunks)