New Features

This release adds 12 new utility functions to enhance string and slice manipulation capabilities.

Slice Operations

• Filter: Filter slice elements by predicate function
• Map: Transform each element using a function
• Reverse: Reverse slice order
• IndexOf: Find first occurrence index
• LastIndexOf: Find last occurrence index

Set Operations

• Difference: Get elements in first slice but not in second
• Union: Combine multiple slices and remove duplicates
• Intersection: Get common elements between slices

String Operations

• NormalizeWhitespace: Clean up and normalize whitespace
• IsBlank: Check if string is empty or only whitespace
• RemovePrefix: Remove prefix if present
• RemoveSuffix: Remove suffix if present

Improvements

• All new functions follow consistent patterns
• Proper nil and empty input handling
• Efficient O(n) algorithms for set operations
• No input mutation - all functions return new slices
• Comprehensive test coverage maintained at 98.8%

Documentation

• README updated with categorized function list
• All functions properly documented with godoc comments