Autrijus on Fire - What is Haskell?
In an interview with Autrijus Tang, we hear Autriju making several strong statements in support of Haskell:
IN THE LANGUAGE SPECTRUM
Haskell is faster than C++, more concise than Perl, more regular than Python, more flexible than Ruby, more typeful than C#, more robust than Java, and has absolutely nothing in common with PHP.
ECONOMY AND POWER
Most languages require you to pay a "language tax": code that does nothing with the main algorithm, placed there only to make the computer happy.
Thus there is a threshold of refactoring: if introducing a new class or a new function costs five lines, programmers are encouraged to copy-and-paste four lines over and over again instead of abstracting them out, even with help from a good refactoring browser.
On the other end of spectrum, we often shy away from abstracting huge legacy code because we are afraid of breaking the complex interplay of flow control and global and mutable variables. Besides, the paths leading to common targets of refactoring--those Design Patterns--are often non-obvious.
Because Haskell makes all side effects explicit, code can be refactored in a safe and automatic way. Indeed, you can ask a bot on #haskell to turn programs to its most abstracted form for you. Haskell also encourages you to shape the language to fit your problem domain, so the program often reads out like a runnable specification.