LiveScript is a functional programming language that compiles to JavaScript, emphasizing simplicity and high-level abstractions, while Hack is a statically typed language built on PHP, focusing on performance and type safety.
Hack
Pros:
Static typing for better error detection
Compatibility with PHP
Built-in collections and generics
Performance optimizations
Strong type inference
Cons:
Steeper learning curve for those unfamiliar with PHP
Can be verbose compared to PHP
Not as widely adopted as other languages
LiveScript
Pros:
Simplicity and ease of use
Powerful macro system
Strong support for functional programming
High-level abstractions
Integration with JavaScript
Cons:
Limited community support
Less documentation compared to mainstream languages